Installation
We have limited information regarding installation of our LPG refillable kits as we strongly advise a LPG qualified engineer carries out all installation, testing and servicing of LPG products.
For further information please call us on 0333 335 5614.
About Refillable LPG Gas Kits
Can I fit my LPG Refillable bottle kit myself?
We always recommend any refillable LPG tank/ bottles/ kits are installed by a LPG qualified engineer who will complete installation, testing and servicing of all LPG products.
Where can I install LPG fillpoint?
When positioning any LPG Fill point avoid placing within 500mm of an opening window, vent, vehicle exhaust, mains electric connection or appliance flue.
Do not mount fill point on gas locker door or on any moving panel. This is because every time you open the door, or the panel moves, the fill hose will twist significantly, and it will cause leaks on the joints between the fillpoint and the fill hose.
The fillpoint itself does not need to be higher than the tank as the fillpoint has a special one way non return valve in it. You can install on a skirt of the vehicle.
How do I fit a 70mm fillpoint body mount box?
Please note the fillpoint itself does not need to be higher than the tank as the fillpoint has a special one way non return valve in it.
Don't forget whatever you fit this body fill box to, it's a 70mm outside hole - EVERYTIME.
Don't drill the outside vehicle skin with anything bigger or smaller than 70mm as this is the size of the round fillbox.
If your vehicle has an insulation section in the middle of the inner and outer skin then you need to drill a 70mm hole on the outside of the vehicle and an 86mm hole on the inner. It is important that you DO NOT drill an 86mm hole all the way through the vehicle as the fill boxes are 70mm round.
This 86mm hole will allow the fillbox to correctly grip the outer wall between the inner and outer box section.
It's important to note that you must never mount the 70mm fillpoint box into the gas locker door or on any moving panel.
This is because every time you open the door, or the panel moves, the fill hose will twist significantly, and it will cause leaks on the joints between the fillpoint and the fill hose.
If you are installing a 70mm body mount fillpoint or any part of it like the fill hose is within the living accommodation or habitational area of a vehicle you need to seal the rear of the fill box off with a fillbox angle or straight rubber boot. You also need to cover the fill hose with 30mm vent tubing and vent it externally via a 30mm floor vent. This make sure no gas from when filling or any leaking joint on the fill system goes into the habitational area and it is all vented downwards and out of the vehicle.
Click here for GAS IT venting kit, which includes 30mm vent tubing, floor vent fitting and 22mm plastic brush (for use with rubber boot when using thermoplastic piping).
Please see 'where can I install LPG fillpoint?' for location questions.
How does an auto-changeover valve work?
Auto changeover valves are designed to connect to your existing bulkhead gas regulator via the W20 fitting where a single pigtail usually connected to (it is not a regulator itself ) and allows 2 gas bottles or gas tanks to be connected to one gas pressure regulator. When one bottle or tank becomes empty the auto change over valve switches seamlessly from the empty bottle/tank to the full one and at the same time the dial on the auto change over valve changes from green to red indicating to you that it has changed to the next bottle/tank.
The auto changeover is designed to sit on top of your existing bulkhead regulator via an included W20 x W20 brass fitting. The overall length of the Auto changeover is approximately 100 mm / 4 inches. If the space above your regulator is restricted and the changeover valve will not fit there, you can purchase a W20 to W20 pigtail here.
Automatic changeover valves are not a pressure regulator and is designed to work with your existing fitted bulkhead regulator via the W20 fitting (where your current pigtail goes).
What gas bottle/cylinder sizes are available?
Gas It: 6kg or 11kg
Gaslow: 2.7kg, 6kg or 11kg
You can install a twin kit (two bottles) if you have space within your vehicle. The bottle sizes for twin kits do not have to be the same. Please see here.
Gaslow Wave BlueTooth Gas Level Gauge
Why do I have to register and be logged in for the app to display data at all?
The data is not stored locally on your phone, but centrally on a cloud server. This allows you to change your device without losing your data. To be able to allocate your data, we need user accounts.
What is the GPS data needed for?
The “DIMES” product range also includes a solution for stationary containers (heating) – to be able to offer corresponding services (e.g. automatic filling), the data must be evaluated (customer, location, fill level). Furthermore we plan to include all available LPG filling stations in a later version of the app. This will enable you to find the nearest petrol station directly in the app.
Why does my tracking service have to be activated?
The providers Apple and Android do not allow Bluetooth connection if tracking services are disabled.
What data is collected and what happens to it?
The data will be sent exclusively to (ROTAREX S.A.) the manufactures of the Multivalve. You can find further information at Click Here
I am asked for a PIN when configuring the app. Where is it located?
The PIN is located on the sticker on the back of the module.
Can I measure the level with the Gaslow Wave without an internet connection?
The current fill level can also be read without an Internet connection. Only the charts/graphs are set up via the cloud server.
The app is showing me a wrong fill level
If the app is showing REFILL (empty) although you knowingly have a full gas bottle (or generally get a wrong display), this may be due to the special feature of the “first alignment” of the sensor. As this is a mechanical level sensor which transmits the fill level from the valve to the display unit via a magnetic connection, under special circumstances it is possible that the two magnets “jam” together. Only when the float is moved the magnets are correctly aligned (by gas extraction and/or by vibrations during travel). Alternatively, the magnet in the sensor can be influenced with an external magnet so that it is manually released. For this reason the app should be set up and tested during installation before the sensor is screwed together (in this case the sensor can be adjusted again manually using an external magnet. Unfortunately, this problem is due to the design and cannot be solved constructively. The problem only exists once – once the system is aligned, this problem will not reoccur. This could have produced an incorrect value during your first measurements (which is why the level seems to have increased).
The plug can no longer be removed from the sensor
The plug connection is designed according to protection class IP54, which requires a good and secure connection. To release the connection, it is best to use a small (slotted) screwdriver, with which you press in the latch directly above the plug connection to be able to pull the plug upwards.
Can several devices be connected simultaneously?
The DIMES transmitter unit can only establish one connection at a time, but they can connect several devices (just not in parallel). This situation is due to the Bluetooth Low Energy (BLE) standard.
How often is the data updated?
The default frequency is 12 hours, under ANDROID (Apple unfortunately does not support this functionality) you can set the cycle yourself (Menu – Global Settings – Advanced Settings). Please enter the value in minutes (e.g. 120 for an automatic update every 2 hours). Please also consider that a shorter transmission frequency also means higher energy consumption (battery life).
The Rotarex SRG App will not let me register
Once you have downloaded the Rotarex SRG App you will have to register to use the device. When you click register and try to enter your email address it will not allow you to type. This is caused by the phone being on the magnified screen setting, change the screen settings back to normal view and the app will accept you to register.
Contents of Gaslow Wave Kit
Hall sensor 0.5 – 4.5 V (RRD Remote Readout Dial)
WAVE transmitter box with 1 m cable length (without batteries)
Holder for WAVE Box with velcro fastener Allen Key with 2 screws for replacement
Will my LPG refillable kit have an expiry date?
Your bottle will be stamped with a expiry date on the collar or base ring depending on the age of the cylinder/bottle.
At this point your bottle will need to be replaced or re-certified.
Currently with Gaslow you can re-certify for £99.00 including VAT per cylinder/bottle.
Please contact us to discuss your options at the time of your expiry.
Filling your LPG Refillable Bottle
IMPORTANT - How do I fill my gas bottle for the first time?
We always recommend a GAS IT gas tank or gas bottles LPG qualified
engineer carries out all testing and servicing of GAS IT products.
Installation and testing with a qualified engineer will ensure that N.C.C. commissioning requirements are met.
Purging and checking the kit before use.
How do I refill my LPG refillable gas bottle or tank?
Please ensure your LPG engineer has checked your system ready for your first fill.
IMPORTANT - please don't confuse a self-refillable gas bottles / tanks, with normal exchange type gas bottles.
All refillable LPG bottles and tanks are solely designed to be self-refillable from any Autogas station or LPG pump anywhere in the world. They have been installed with the latest safety valve systems, that makes sure the filling of them is legal and easy to do, by limiting the gas level to where it automatically shuts off when the LPG gets to the bottle or gas tanks 80% volume using an 80% shut off fill valve.
The refilling of the bottle systems in the UK is very straightforward and is no more difficult to do than the refilling your car or van with petrol or diesel. Filling abroad is also super easy as it only need the purchase of a European Adaptors set, please see here. The adapter for the country you are visiting screws into the end of the UK fillpoint on your installed vehicles and allows filling to be carried out the same as in the UK.
How do I refill a bottle with Autogas?
The Autogas supplier you're using to fill up will give you the legal instructions on how to use their pumps and refill your gas bottle with Autogas.
It's also worth noting that as there are so many different brands of pumps, buttons to press for dispensing Autogas and many ways to use the gas pumps filling gun, we always recommend that you follow the legal and safe instructions set out by the Autogas pump supplier you are using at the time.
Some points to consider refilling your bottles; Never try to overfill an already full refillable gas tank. When refilling at the Autogas pump, the fill speed (the speed the litres increase on the pump) should be constant and this speed will become familiar. When full the tank will stop (all refillable bottles are fitted with 80% Automatic shut off valves within the tank) but should you at any time see the speed drop on the filling litres display to a point that is noticeably slow or note that the pump is taking more time to fill than normal then immediately stop attempting to fill as your tank are likely to be already full and the pump your filling from is over pressuring. it's always worth getting to know the litres the bottles hold from empty so you pre recognise when the bottle is getting toward full.
Where can I fill up my refillable gas bottle?
LPG filling locations are not just at major garage forecourts they are on industrial estates, small independent repair garages and MOT stations and even farms so whilst it might seem like there are no LPG filling locations near your location it's well worth a look on the internet under LPG filling or at an online map. Whilst it does not list every filling location, but it is growing in detail and even better still any info you pass the site directly will be added or changed for everyone's benefit.
Some independent websites and apps;
Should I leave my cylinders/bottles turned on when filling with LPG?
Always ensure that your bottles/ cylinders are turned off before filling commences. This applies to all LPG systems.
Traveling to Europe
I'm going abroad, what do I need to fill up my system?
When going abroad with any Autogas system (car, motorhome, caravan, etc) you will need the fill point to be changed to the country you're going to so you can refill it wherever you are via the Autogas pumps in the country you are visiting. Changing the physical fill point it's self on the side of your vehicle for every country you are going to is really impractical, so GAS IT have 3 European fill point adaptors in total which simply screw into the UK fillpoint on the vehicle to allow you to fill in the country(s) you visit.
Each country will have its own fill gun system, some design's and types of fill guns have been borrowed for other countries - so for example, France and Italy use the same adaptor, Germany and Southern Ireland use another, so if you're traveling around Europe then with your UK fillpoint covering the UK and Holland, you only need a maximum of 3 more GAS IT adapters to cover all the other countries.
We have 2 adapter kits available please view here.
LPG and travelling using the EuroTunnel
Gas used for Domestic Services
If travelling with a campervan, caravan or any other vehicle fitted with cooking facilities, any flammable gas container must be declared when asked and will be checked at the appropriate checkpoint by Eurotunnel Le Shuttle.
Flammable gas containers may be transported with the following restrictions.
In all cases, transport of gas containers to power domestic services (e.g. cooking, lighting & heating, etc.) are restricted as outlined.
Portable Gas Containers (cylinders/bottles)
Cylinders or bottles containing flammable gas that can be moved from the vehicle for replacement or re-filling. The quantity of gas is limited to 47kg (or approximately 93 litres) maximum for a single container and to 50kg (or approximately 99 litres) maximum in the case of several cylinders.
Fixed Gas Containers (tanks,etc)
Fixed containers that are permanently installed or fixed in a vehicle and are refillable from outside the vehicle.
The quantity of gas is limited to 47kg (or approximately 93 litres) maximum for a single container and to 50kg (or approximately 99 litres) maximum in the case of several containers. Each container must be no more than 80% full.
The quantity will be checked via the gauge or remote indicator but if neither are present, the vehicle will be refused.
Combination (portable & fixed containers)
If the vehicle is fitted with a combination of portable and fixed containers, the quantity of gas is limited to 50kg (or approximately 99 litres) maximum and the rules previously described apply.
Note:
All containers and/or gauges/indicators must be of easy access by Euro Tunnel staff for any check. Gas containers must be switched off whilst travelling and connection systems must be in good condition. Opening the container tap or using domestic services as described above is strictly forbidden until the vehicle has unloaded at the arrival terminal.
In case of non-compliance with the above conditions, Eurotunnel Le Shuttle reserves the right to cancel your journey.
The information contained in this document is intended to give guidance and believed to be accurate and represent good practice at the time of publication. The above information has been taken from the Eurotunnel Le Shuttle website. Information given is correct at time of printing. Please refer to Eurotunnel Le shuttles website to unsure up to date information.
No responsibility or liability is accepted by Touring Outlet Limited for any loss or damage arising out of the information given. It is important that all users adhere to all legal requirements, regulations, CoP`s and standards, particularly, those relating to Gas safety.
Troubleshooting
How accurate is the gas level indicator on my gas bottle?
GAS IT gauge:
The Gas level shown in a GAS IT tank is fed to the outside gauge by a float system that physically floats on top of the liquid LPG in the tank and this level is given to the outside indicator. As this gas level can vary due to temperature of the propane (as it expands and contracts) and its affected by the angle of the tank, the shape of the tank, the amount of gas in the tank at a given time and the actual level of the vehicle the tanks fitted to, it is hard to offer a definitive answer to what each LED or marking on the manual gas level gauge will indicate.
Gaslow Refillable LPG MultiValve Cylinder Contents Gauge:
The gas contents gauge on a Gaslow Multivalve cylinder is the most accurate contents gauge you will see on any LPG gas cylinder on the market. The Gaslow Multivalve displays on a clear covered contents gauge on top of the multivalve that has a rotation of 362 degrees to give you a wide-ranging reading of the contents. The contents gauge is also viewable from the top and sides, making it easy to view even in the tightest of spaces.
To find out more please click here.
Checking for leaks, what should I use?
DO NOT use Washing Up Liquid or non-approved leak detection sprays as these will damage the brass and stainless steel parts used in gas systems.
It is really important that you use the correct approved leak detection fluid and DO NOT use soapy water or non-approved leak sprays as these will lead to significant damage and even failure of the brass or stainless steel components being tested.
In the washing up liquid the Ammonia they put in for example will lead to stress cracks appearing which will seep into all parts of the valve and lead to brass parts failing catastrophically and simply put valves will leak in some way or form. Chlorine in the washing up liquid will cause the same damage to stainless steel parts.
Don't assume all leak detection fluids are the same as it is known in the industry that some leak fluids have significance ammonia and chlorine in them which has caused brass parts to completely crack and shatter even before LPG under pressure was put in the gas system.
If you're unsure of the specification of the leak detection fluid, please purchase via our webstore here or ensure fit for purpose to BS EN 14291 requirements.
Alternatively, you can use one of the electronic sniffer devices which detects leaking LPG and will gives and audible warning. Please note these devices prove to be a bit hit and miss if you use an electronic sniffer in windy locations or when you need to pinpoint a exact location, so the most common way to detect leaks is the use of a fully certified (to BS EN 14291) and approved Leak Detection Fluid (LDF).
I have a propane regulator, how do i connect that to a LPG refillable system?
If you use a UK propane regulator or propane pigtail and want to connect it any LPG Refillable bottle you will need a fitting to convert the outlet tap.
The easy to fit propane adaptor comes as standard with all kits (unless you opt to remove from your kit purchase), to buy the adapter separately please see here. The adapter simply screws onto the outlet tap of our refillable bottle and converts it to UK POL, so you can use your UK propane pigtail as normal.
Freezing regulator and/or pipework
A freezing regulator means it has the inability to control the gas pressure coming out of it! If you notice or experience gas pressure issues immediately turn off and stop using ALL the gas appliances in your vehicle and turn off the gas bottle or gas tank and seek and experienced LPG gas engineers to look at the cause and carry out any tests to make sure the system and regulator are not damaged and needs replacing.
Regulators can freeze for many reasons, be it from the demand on the regulator being high, the outside temperatures are very low and it's a very damp atmosphere (or a combination of all the above) or it could be liquid is coming out from the bottle or tank to the regulator.
- By high demand we mean there is a lot of gas being drawn through the regulator - like when running a high flow gas burner and the outside temperature is damp and cold, then the regulator could freeze.
- If the bottle or tank is at the wrong angle e.g. upside down, then instead of vapour gas coming from the outlet tap you could be getting liquid gas (LPG) coming out which will go through the regulator. the liquid LPG will try to change to a vapour in the regulator and thus the regulator will freeze.
- If the bottle or tank is over filled then liquid could come out of the outlet tap as well, until the internal snorkel was below the liquid level. Over filling of a gas bottle or tank can be due to the pump being held in the on position, when in fact the automatic shut off valve is trying to shut the gas off, the pump pressure will slowly overcome the automatic shut off valve in the tank or bottle. This tends to exhibit itself by the display on the pump slowed down compared to the tank was empty - this is classically the user trying to overfill and squeeze as much gas in the tank or bottle as possible.
On very rare occasions, if the forecourts Autogas pump pressure relief valve is not working correctly, the pumps pressure can be much higher than normal so when the tank or bottle auto shut off valve tries to stop the filling of the tank or bottle, the pressure from the auto gas pump can overcome the tank/bottles shut off valve and fill until the tank / bottle is full. The thing to look for here is if you know you usually only take 20 litres to fill a tank but you end up seeing the Autogas pump display going to 21 litres, 22 litres, 23 litres and so forth when the simple solution is to just stop filling.
If your tank or bottle does get overfilled, then the solution your LPG engineer will offer is to safely remove some of the liquid LPG from the bottle or tank for a minute or so. This will lower the liquid level in the tank so it's then down below the pickup pipe or outlet of the bottle/tank and only vapour is present.
Gas
What is LPG?
LPG is a fossil fuel closely linked to oil. About two thirds of the LPG is extracted directly from the Earth in the same way as ordinary natural gas.
LPG (liquefied petroleum gas) contained in cylinders are supplied either as Butane or Propane. – Commercial Butane, which contains approximately 80-90% of Butane whilst commercial Propane contains approximately 90-95% Propane.
Large quantities of flammable vapour can be produced from relatively small amounts of liquid LPG stored in cylinders and gas tanks. This makes LPG an ideal portable fuel, cylinders must always remain upright to ensure only vapour exits the cylinder valve before it enters the regulators.
At atmospheric pressure BUTANE boils at 0-2°C and PROPANE boils at -45°C
Contained in cylinders or bulk tank, LPG remains a liquid under pressure and this pressure depends on the type of LPG and the ambient or cylinder temperature surrounding the cylinder.
LPG exists as a gas at normal atmospheric pressure & temperatures, but may be liquefied by the application of moderate pressure. If the pressure is released the liquid will revert back to vapour.
LPG as a liquid is colourless and as a vapour and cannot be seen.
Smell
Pure LPG has no distinctive smell so for safety reasons a stenching agent is added during production to give a pungent, unpleasant smell and so aid detection.
Flammability
When LPG is mixed with air, a highly flammable mixture is produced. The flammability range is between 2% to 11% by volume of gas to air. Outside this range any mixture is either to weak or rich to potentially ignite.
Vaporisation
One litre of liquid LPG will produce approximately 250 litres of flammable gas vapour. “Always treat LPG with respect.
Vapour Density
LPG vapour is heavier than air. Any escapes will find its way to the lowest level where it can remain and form a flammable mixture. Therefore LPG vessels must be sited away from drains and appliances must not be sited in basements or cellars. Cylinders in boats and ships must be stored in purpose built sealed gas lockers.
Liquid Density
LPG is lighter than water and therefore floats on top of it in a similar way to oil and petrol. Care must be taken with LPG dropping into drains or basements.
Vapour Pressure
The pressure LPG exerts on a vessel varies with ambient temperature. The higher the temperature of the liquid the higher the vapour pressure, conversely the lower the temperature the lower the pressure. Commercial Propane has a vapour pressure of approximately 6.42Bar (93psi) at 15 Degrees C. Commercial Butane has a vapour pressure of approximately 0.79Bar (11.5psi) at 15 Degrees C. Because of these characteristics Butane can be used indoors and Propane must only be used outdoors.
In a cylinder LPG is liquid at the bottom and vapour under pressure at the top. When there is an off-take of gas, the gas volume is regenerated by boiling off the liquid part. This vaporisation cools down the liquid. The heat required to continue the LPG to boil is the surrounding air or ambient temperature in contact with the cylinder.
Propane delivers high pressure at colder temperatures and is vaporised faster so is used and stored outside. Butane is used mainly for indoor or summer use.
During off-take, the temperature decreases, then the pressure decreases. When only a small amount of liquid remains in the cylinder, the pressure is lower than when the cylinder was full. Likewise the larger the cylinder the greater the surface area and so more vapour can be produced. This is called the vaporisation rate.
Expansion
When LPG heats up it expands very rapidly. In order to allow for expansion LPG cylinders and tanks are only filled by volume to a maximum of 80% of the total volume of the retaining vessel.
Boiling Point
The boiling point is the temperature below which LPG will not vaporise to form a gas vapour.
The boiling point of Commercial Propane is approximately – 42oC.
The boiling point of Commercial Butane is approximately – 2oC.
Commercial Butane can be affected by cold weather resulting in poor pressure and should not be used outdoors in winter months. Commercial Propane is not adversely affected by cold weather in the UK and is an ideal fuel source for heating, cooking and industrial applications.
Chemical Reaction
LPG is aggressive to certain non-metallic materials like natural rubber and many plastics; therefore equipment and hoses must be suitable for LPG and hose replacement dates must be adhered to.
Calorific Value
The Calorific Value of a fuel is described as “The amount of heat released when a known quantity of fuel is burned”.
Commercial Propane = 95 MJ / m3
Commercial Butane = 121 MJ / m3
It is important that any gas appliances fuelled by LPG are designed and manufactured for that purpose.
Fuel / Air Mix
Commercial Propane = 23:1
Commercial Butane = 30:1
Therefore, it is important that appliances fuelled LPG are provided with adequate ventilation and serviced regularly to ensure that they burn efficiently.
Toxicity
LPG is non-toxic but at very high concentrations in air, LPG vapour acts as an anaesthetic and subsequently an asphyxiate by diluting or decreasing the available oxygen.
Safety
Care must be taken when using LPG! If LPG comes into contact with skin it will cause severe burns. Protective gloves should be worn at all times when dealing with LPG.
What low temperature will my butane bottle stop working at?
When it comes to LPG people get confused by freezing point and boiling point.
For butane gas, the freezing point is around -140 degrees celsius, but the boiling point of butane is -2 degrees celsius. Your blue butane gas cylinder might not work as effectively in colder weather as low temperatures make it difficult to produce gas vapour.
Basically, put we need a higher ambient outside temperature to boil the liquid gas off in the bottle to allow it to change to a vapour.
If you want a gas bottle that will work in lower temperatures, change your gas bottle to a red exchange type or better still an LPG refillable bottle.
What low temperature will my propane bottle stop working at?
When it comes to LPG people get confused by freezing point and boiling point of LPG.
The boiling point is where the liquid LPG in the gas bottle boils off to produce a vapour gas. This depends on the gas type used in the bottle, the ambient in bottle and outside temperature, the moisture in the air, the amount of gas being drawn from the bottle and even the material the bottle is made from, will all have an impact to how much gas vapour is boiled off / produced inside the bottle.
For propane gas, the freezing point is around -188 degrees celsius, but the boiling point of propane is -42 degrees celsius which is the important temperature for the users of the gas, so your red propane gas cylinder will work more effectively in much colder weather compared to a blue butane gas bottle.
If you want a gas bottle that will work in lower temperatures you will need to run a red propane exchange type or better still fit an LPG refillable bottle which is easier to use, can be easily filled in other countries who sell Autogas.
What is Autogas in the UK and Europe? How is it affected by temperature?
What is Autogas? Autogas in the UK is predominantly propane. It can vary a little but in the UK Autogas is always the same mixture of gas that comes in a red exchange propane gas bottle, which is usually a minimum of 90% propane and the rest a mixture of butane and other bits of petroleum based products. So filling your refillable gas bottle with Autogas in the UK will allow your appliances and heating to work in the same way they do when you ran them on red propane bottles.
The boiling point of propane is -42 degrees celsius which is the important temperature for the users of the gas as your red propane gas cylinder will work more effectively in much colder weather compared to a blue butane gas bottles. Knowing that you fill your refillable bottle mainly with propane in the UK your good to go down to around -30 to -35 celsius.
In Europe though Autogas can vary in what it is made of and this can go from as much as 50% propane and 50% butane (give or take some other petroleum products). They generally change the autogas depending on the time of year, so there is more propane in winter and less in summer.
Eitherway, this is perfectly ok and your gas appliances will generally work ok with them but because its a blend/mix of both LPG gases, the temperature the gas tank or gas cylinders will work down is not as low, and as good as just having a propane gas bottle.
Service life on pigtails
The service life on rubber pigtails is generally from 5 years and on stainless steel pigtails this is up to 20 years after the date of installation, however as with all hoses, we always recommend they are checked on a regular bases and a visual check (plus a leak check) is done when changing the gas cylinder(s).