Cadac 2 gas point

[grante]

Hi all, I have a Cadac 2. My gas point is at the front of my caravan but I want to use the cadac at the back of my caravan.

As I see it I have 3 options

1 ) use the cadac at the front of my caravan
2 ) buy another gas bottle rather than using the one on board.
3) buy a 8 / 10 mtr gas hose and run it underneath my caravan to the rear

Has anyone do option 3. Just slightly concerned that the gas pressure may drop over the length of the hose.

You help would be appreciated.

Thank you

 

[otherclive]

I have always used second gas bottle. Sometimes a 6kg Calor, or a Campingaz 904. That way I could put it where most convenient. To cater for the two different regulators of Calor and Campingaz I have a QR connection on the Cadac, and two relatively short hoses each carrying its own regulator for the specific bottle.

 

[ProfJohnL]

Hi all, I have a Cadac 2. My gas point is at the front of my caravan but I want to use the cadac at the back of my caravan.

As I see it I have 3 options

1 ) use the cadac at the front of my caravan
2 ) buy another gas bottle rather than using the one on board.
3) buy a 8 / 10 mtr gas hose and run it underneath my caravan to the rear

Has anyone do option 3. Just slightly concerned that the gas pressure may drop over the length of the hose.

You help would be appreciated.

Thank you

Whilst you might find a small drop in pressure over that length, its very unlikely to be noticeable in practice, provided you use true 8mm id LPG compatible pipe.

 

[grante]

Whilst you might find a small drop in pressure over that length, its very unlikely to be noticeable in practice, provided you use true 8mm id LPG compatible pipe.

Thanks, my van is sited and didn't really want to purchase and addition gas bottle 👍🏼

 

[Dustydog]

There is no law that dictates the maximum length of flexible pipe. Just note they are all date stamped and technically have to replaced once life expired.
Permanently fitting a flex pipe may lead to you forgetting the expiry date or someone else in the event you sell on,
Why not use the correct metal pipe and plumb that in? Good for years and another external gas point.

 

[Mr Plodd]

What makes you think the pressure might drop? Domestic gas is piped for many miles, and for a pretty fair way once past the meter at your house without pressure issues.

 

[ProfJohnL]

What makes you think the pressure might drop? Domestic gas is piped for many miles, and for a pretty fair way once past the meter at your house without pressure issues.

The gas main in the street is run at a higher pressure than you need in the house to ensure there is sufficient pressure at each property where a regulator is installed to control the local domestic pressure within the property.

The amount of gas that flows through a pipe depends on the combined usage of the appliances connected downstream of the pipe. The greater the usage the greater the gas flow and thus the greater the pressure dop that will arise along the pipe.

From what I can gleen from googling cadac's it seems they are rated at about 300gms per hour, It will of course be model specific, and at that rate of consumption the pressure drop along an 8mmiD pipe should be well within the capability of 5m long flexible pipe.

 

[Mr Plodd]

I am aware of tge mains pressure being higher, hence my comment about the gas having to possibly travel a fair way once past it without any drop in pressure!

Anyway the important thing is that the OP will be OK with a 5m run of gas hose to his Cadac. Just needs to be aware of the need to fully purge all of the air out fully before lighting it as there's is (bizarrley) no flame failure device fitted to Cadacs (which to my mind is a pretty serious safety omission)

 

[Buckman]

I am aware of tge mains pressure being higher, hence my comment about the gas having to possibly travel a fair way once past it without any drop in pressure!

Anyway the important thing is that the OP will be OK with a 5m run of gas hose to his Cadac. Just needs to be aware of the need to fully purge all of the air out fully before lighting it as there's is (bizarrley) no flame failure device fitted to Cadacs (which to my mind is a pretty serious safety omission)

Our hose is 3m long which is more than sufficient for our needs and keeps the BBQ well away from the awning however it is well past 3 years.

 

[Paullus1959]

I have 9m of hose so I can use my Cadac wherever it suits best. But, the 9m total length comprises three separate lengths of hose, 1.5m, 3.5m and 4m with quick-release couplers so, I can easily create the most appropriate length for the circumstances. Works well for me.

 

[Raywood]

When we were buying the pipe and regulator for our CADAC we were told you should not have more than two metres of the rubber pipe. I have never checked this out so cannot verify the information but on a run like hat proposed I would try google at least before going further..

 

[ProfJohnL]

When we were buying the pipe and regulator for our CADAC we were told you should not have more than two metres of the rubber pipe. I have never checked this out so cannot verify the information but on a run like hat proposed I would try google at least before going further..

Firstly it should not be "rubber" pipe as LPG will dissolve rubber. It should be a specific LPG compatible pipe (invariably a neoprene variant) manufactured to British Standard BS3212: 1991

There is no "max length" regulation, but many retailers only sell pre-cut lengths. Some retailers may also have a company policy of not supplying longer lengths. You should be able to get it from the roll at builders merchants or specialist gas suppliers

From a practical perspective, it's always better to keep flexible pipes as short as is reasonably possible. It can avoid trip hazards, and it costs less to replace.

 

[Buckman]

At B&Q you can buy any length off the reel, no questions asked. Anyway it is none of their business how you want to use the hose.

 

[ProfJohnL]

I am aware of tge mains pressure being higher, hence my comment about the gas having to possibly travel a fair way once past it without any drop in pressure!

Anyway the important thing is that the OP will be OK with a 5m run of gas hose to his Cadac. Just needs to be aware of the need to fully purge all of the air out fully before lighting it as there's is (bizarrley) no flame failure device fitted to Cadacs (which to my mind is a pretty serious safety omission)

I'm sorry, but as you did not mention a pressure regulator at the premises, it implied the mains ran at the same pressure, which it doesn't.

 

[ProfJohnL]

At B&Q you can buy any length off the reel, no questions asked. Anyway it is none of their business how you want to use the hose.

Actually it is partly the retailers duty to understand the application, to ensure they know the goods sold will do what the customer wants to do safely. If a retailer knew a customer was going to use the wrong type of pipe, they need to protect themselves by either refusing to sell, or to advise the customer of the correct product for the job.

Now that opens up a can of worms....

 

[Buckman]

Actually it is partly the retailers duty to understand the application, to ensure they know the goods sold will do what the customer wants to do safely. If a retailer knew a customer was going to use the wrong type of pipe, they need to protect themselves by either refusing to sell, or to advise the customer of the correct product for the job.

Now that opens up a can of worms....

Very true about the can!

 

[Paullus1959]

Something to be aware of when buying LPG gas hose is the date stamp on the hose. There is conflicting information regarding this date though, some saying it's the year of manufacture and others saying it's the expiry date. Some sources say it should be replaced after five years too, not unlike caravan tyres which is a whole other story.
I bought some LPG hose from eBay. It had all the certification markings and date stamp but, the outer rubber sheath started to crack very quickly. I have other hoses on gas appliances which are years old and in perfectly good condition. So, all hoses are not of equal quality, don't go for cheap stuff.

 

[ProfJohnL]

Something to be aware of when buying LPG gas hose is the date stamp on the hose. There is conflicting information regarding this date though, some saying it's the year of manufacture and others saying it's the expiry date. Some sources say it should be replaced after five years too, not unlike caravan tyres which is a whole other story.
I bought some LPG hose from eBay. It had all the certification markings and date stamp but, the outer rubber sheath started to crack very quickly. I have other hoses on gas appliances which are years old and in perfectly good condition. So, all hoses are not of equal quality, don't go for cheap stuff.

Hoses manufactured to BS3212: 1991 are stamped with the date of manufacture.

 

[Raywood]

Firstly it should not be "rubber" pipe as LPG will dissolve rubber. It should be a specific LPG compatible pipe (invariably a neoprene variant) manufactured to British Standard BS3212: 1991

There is no "max length" regulation, but many retailers only sell pre-cut lengths. Some retailers may also have a company policy of not supplying longer lengths. You should be able to get it from the roll at builders merchants or specialist gas suppliers

From a practical perspective, it's always better to keep flexible pipes as short as is reasonably possible. It can avoid trip hazards, and it costs less to replace.

Sorry I was referring to the look rather than the make up of the item. The dealer who gave the advice was cutting the pipe off a reel, but as 2m was enough for us I did not take the point further.