How to fit a Gaslow Kit to your Motorhome or Caravan

Gaslow typical kit

This is a simple guide on how to install a twin Gaslow Bottle system to your Motorhome or Caravan assuming you have a standard bulkhead mounted regulator (i.e. fixed to the back wall, most Motorhomes and Caravans post 2004 will have this, if in doubt then give us a call on 0845 8698940).

Please note that mishandling of Gas bottles and Gas can be dangerous and installation although may be carried out by anyone should be attempted by competent persons only, if in doubt and you would rather a professional did the Gaslow installation for you then we can fit a Gaslow kit in our workshop. Contact us on our main site at Outdoorbits for a quote or phone us on 0845 8698940

Installation for a single bottle installation is very similar with the exception of the 2nd cylinder connection hose not being required / used and there is usually no changeover valve unless you upgrade to one for improved convenience.

A Typical Gaslow Installation with details of the individual parts used (Click the image to see a larger version)

Gaslow typical kit
Gaslow typical kit
Gaslow installation
Above shows Previous Model Gaslow Bottles installation

Below are a list of tools needed, this is a fairly comprehensive list however you may not need all of them or there may be some specialist tools required depending on your install.

Tools required on most typical installations:

  • Open ended 24mm spanner (an adjustable wrench will suffice).
  • 70mm Holesaw with appropriate Drill and Arbor.
  • Crossheaded screw drivers (at least PH2 and larger ideally).
  • 8mm box spanner / ratcheting spanner.
  • Small set of files.
  • Adjustable wrench.
  • Vice grips.
  • Leak detector spray, please do not use washing liquid as it can corrode connections and materials in the Gas Locker.
  • Caulking Gun.
  • Suitable UV stable sealant.
  • Loxeal 18-10 Sealant (optional).

What size bottles will fit?

The first consideration is what size bottles will fit. If the clearance above the head of the bottle is less than 13cm then a right angle adaptor (part number 01-4210) is required to prevent kinking the inlet hoses to the bottle.

Ideally you’d fit the largest bottle(s) that will fit into the space available, as you can then carry more Gas without spending significantly more.

Gaslow Bottle Dimensions (R67 bottles):

Link to R67 Range Of Gaslow Bottles

  • 11KG R67: Height: 560mm – Diameter: 304mm – Empty weight: 12.4KG.
  • 6KG R67: Height: 460mm – Diameter: 246mm – Empty weight: 7.0KG.
  • 2.7KG R67: Height 310mm – Diameter: 202mm – Empty weight: 5.0KG.

The 01-4210 Right Angle Adaptor for No.2 cylinders is approx 48mm tall when fitted should you have a low locker and wish to maximise the Gas storage capacity.

Locating and fitting the filling point:

Once bottle size is decided then the next choice is where to mount the filler point. There are three mounting point options:

  1. Internal mounting on a filling point mounting bracket (part number 01-4160) within the Gas Locker. This may require some modifying and spacing using additional materials (bracket dimensions are 100mm wide, 103mm deep and 148mm tall.
  2. Door mounting where the filler is fitted through the Gas Locker door (requires a 90 degree adaptor, part number 01-4210, on the rear of the filler point to reduce stress on the fitting).
  3. External mounting either in the skirt of the vehicle or in the side of the motorhome / caravan. (Optimal choice in our opinion, looks the neatest, less stress on fitting, no issues with continental filling where the station attendant mistakenly thinks you are filling a none refillable bottle and stops you filling).


Above image shows a door mounted installation with the mandatory right angle adaptor behind already fitted.

Gaslow filling kit mounted on side of motorhome
Above image shows a Gaslow filling kit mounted on side of motorhome

Now you know where the filler is going to be mounted we can offer up the cylindrical housing of the filler and check (and check again) for any issues with your desired location. Check on the rear of the fitting location for any constraints remembering that the rear of the filler will have the stainless steel hose (usually 1.5m in length if an external filling location) and so this has to be taken into account also for any issues nearby.

Once you are 100% happy with the positioning of the filler you can go ahead and drill the  70mm hole. This will be the most stressful point of the install (its impossible to cover a 70mm hole up !) So take your time.

TIP: When drilling, where possible, drill the front first then drill the rear separately to ensure a nice clean finish.

Using small box files you then need to file a locating key slot in the top and bottle sections of the hole you drilled which the mounting point lugs locate in and prevent turning once installed.

Mount the filling point, being aware there are three sizes of mounting screws that Gaslow provide. The smallest in length are hex head screws and then sets of medium and long standard cross headed screws. Use whichever set you require based on the thickness of material you are screwing through.

Tip: Depending on the location of the mounting point it might be worthwhile mounting the filling point hose on to filling point before mounting it as access may be an issue afterwards.

Once the mounting point is fully installed, sigh a breath of relief and get on with the mostly easy rest of the install.

We usually mount the changeover valve at this stage, attaching both bottle hoses to the changeover before mounting as again it is usually easier to do this outside of the locker than within tight confines.

Tip: if the regulator is mounted high up in the locker it may not be possible to mount the changeover valve on top of it due to lack of space and so in this instance you can opt to use a W20 right angle adaptor (part number: 01-1677) to bring the connection forwards towards the front of the locker and then mount the changeover on this and the changeover window can still be viewed.

We then place the bottles inside the locker ensuring the retaining straps go around them and hold them securely in place and that they are not obstructing the gas dispersal holes in the floor if present (Note: some Hymer models do not have holes in the floor and opt instead for a small flap that folds down at the front meaning gas leaks can easily escape through this slot instead)

Secure the hoses from the changeover valves to the bottle remembering they are a Left Handed thread and so tighten up opposite to standard heads (Any nut which has slots cut in its edges is a LH Thread if you didn’t already know)

The next hose to tackle is the 2nd Cylinder connection hose 01-4200 which goes between both bottles and whose purpose is to fill both bottles at the same time when you fill at the pump.

Finally we can now connect the filling point hose to the No.2 Bottle.

Once you are happy all your connections are tight we can test for leaks. If you have a spare LPG Calor or equivalent bottle and a reserve connection hose you can simply connect it up to the filler point. Turn on the gas and spray the joints with Leak detecting spray and check for smells and bubbles. LPG Gas is normally odourless but a stenching agent called Ethyl Mercaptan has been added which our human noses can pick up in even minute concentrations. It smells of rotten cabbages and adheres to materials so be aware clothes / human skin etc can smell of LPG gas even once the gas is dispersed.

4 thoughts on “How to fit a Gaslow Kit to your Motorhome or Caravan

  1. sprinter_benidorm says:

    Hiya – I have just bought 90 degree adaptor, part number 01-4210, from you at Outdoor Bits and it is not Brass? The one you’ve sent is a Zinc Coloured matal that a Magnet severely grabs at = Rust if exposed to rain.

    Have I bought a Fake? I look at yours here and it shows Brass Coloured

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