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Twin underslung tank system (1 Viewer)

Aug 24, 2022
243
658
South Killingholme, Lincolnshire.
Funster No
90,861
MH
Autocruise Gleneagle
Exp
I'm a newbie had a wobbly box when adam was a lad
Hi all, I've noticed that a lot of vans only have space for 2 7 kg bottles as I am away for a month at a time at least it could pose problems, especially in winter. So I was thinking of linking 2 25 kg or bigger underslung tanks together with a change-over valve like the gaslow system I have in my WB, is this possible?
 

TerryL

LIFE MEMBER
Mar 5, 2010
6,217
8,237
North East
Funster No
10,511
MH
Low Profile
Exp
2009
Anything is possible! But with that much gas you won't be able to go on the Channel Tunnel.
It all depends on how much space you've got underneath.
 
Sep 12, 2016
2,278
5,059
Chesterfield England Tellus 3
Funster No
45,091
MH
Lunar Roadstar 800
Exp
6 years
We have 2x 11kg (22kg) cylinders that equals 44L of gas and this lasts us around 2.5 months in almost continuous use though we do have a small fridge freezer not a tal one and we do use gas a lot as we tend to use aires and pub stops

So 2 x 25kg = 50 Litres whereas our friends have a single 70L underslung tank so why have the extra weight

Also on the Tunnel as long as you can turn the gas off and it is NOT used for traction you're fine
 

Lenny HB

LIFE MEMBER
Oct 18, 2007
54,089
152,642
On the coast in West Sussex
Funster No
658
MH
Hymer B678 DL
Exp
Since 2008 & many years tugging
We have 2x 11kg (22kg) cylinders that equals 44L of gas and this lasts us around 2.5 months in almost continuous use though we do have a small fridge freezer not a tal one and we do use gas a lot as we tend to use aires and pub stops
That's very low we have 2 x 14kg cylinders approx 56lt. One cylinder lasts us 15 days and our winter camping is done in Spain or Southern France so don't use it much in cold weather.
Also on the Tunnel as long as you can turn the gas off and it is NOT used for traction you're fine
Limit of 90 Lt on the Tunnel.

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Jul 6, 2009
1,835
2,279
Funster No
7,383
1663453574250.jpeg


1663453629069.jpeg


1 x 25 ltr , 1 x 30 ltr. Both with remote valve control.
 
Apr 27, 2008
11,860
14,117
Eastbourne East Sussex
Funster No
2,327
MH
Hymer low profile
Exp
Since 1972
Can't quite understand the OP. Surely if you run low on gas while away you just refill.
We have 2x11kg and easily enough for a month most of the time but usually refill when less than half full.
 
Aug 18, 2014
23,957
135,676
Lorca,Murcia,Spain
Funster No
32,898
MH
Transit PVC
Exp
16 years since restarting
Who measures the tanks on the tunnel?
It is 47kg max per tank = 93l or a maximum total of 50kgs= 99l itre is states that eurotunnel staff will check gauges or remote indicators & any vehicle without them will be refused.

****The quantity will be checked via the gauge or remote indicator but if neither are present, the vehicle will be refused.****

****Note:
All containers and/or gauges/indicators must be of easy access by our 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****

here:


Looks like no one is doing the job correctly?
 
Mar 30, 2019
2,801
5,210
Cardiff, UK
Funster No
59,476
MH
Coachbuilt
Exp
Since 2016
Heating uses the most gas. I used a whole 7kg bottle in 4 days in sub zero temperatures.

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Jul 6, 2009
1,835
2,279
Funster No
7,383
Around the £2000 mark not sure as had a lot of other work done At the time. We also had the system set up so we could use a bottle in the locker for gas if on a site for a long time and did not want to have to take the van off site.

for more info on my set up speak to Tom Donovan RV installations excellent workmanship.
 
Dec 2, 2019
4,163
9,343
South Lincolnshire
Funster No
67,140
MH
Rapido 7065+
Exp
Broken most bits now
Around the £2000 mark not sure as had a lot of other work done At the time. We also had the system set up so we could use a bottle in the locker for gas if on a site for a long time and did not want to have to take the van off site.

for more info on my set up speak to Tom Donovan RV installations excellent workmanship.
Those tanks look really exposed - I'd be concerned about something hitting them so would want some form of protective skid-plate. The hanger bars look a bit too flexible aswell.
 
Jul 6, 2009
1,835
2,279
Funster No
7,383
It is the approved fiat fixings the controls face rearwards and they have a heavy coating of protective anti chip paint. They have covered over 15,000 miles and show no sign of any problems. Although I had them fitted professionally as an retired engineer Ihave no concerns about the durability of the installation (and I am a fussy bugger)
 
Jan 28, 2008
10,138
18,421
Dovercourt, Harwich, UK
Funster No
1,353
MH
Renalt burstner
Exp
7 years campers before that
It is 47kg max per tank = 93l or a maximum total of 50kgs= 99l itre is states that eurotunnel staff will check gauges or remote indicators & any vehicle without them will be refused.

****The quantity will be checked via the gauge or remote indicator but if neither are present, the vehicle will be refused.****

****Note:
All containers and/or gauges/indicators must be of easy access by our 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****

here:


Looks like no one is doing the job correctly?
the min wage spotty 18 year old who checked us said is the gas off yes i said and turned the hob on by the time id turned it on he was gone
 
Apr 6, 2019
3,822
7,575
Eye, Peterborough, UK
Funster No
59,702
MH
RV
Exp
FourWinds Windsport 6.8L V10
I have 275 litres in underslung tanks 😂😂

But not everyone has the ground clearance of an RV.

Had to replace one 80? Litre tank and all in (Tank, fittings, disposal and a 225 litre refill was about £1,000).

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Jun 30, 2011
7,269
20,274
Barnard Castle, UK
Funster No
17,128
MH
Concorde Concerto
Exp
Since 2007
Those tanks look really exposed - I'd be concerned about something hitting them so would want some form of protective skid-plate. The hanger bars look a bit too flexible aswell.
I thought you had to have a frame or something protecting them too?
 
Jul 6, 2009
1,835
2,279
Funster No
7,383
Whilst nearer the front subframe the plastic fuel tank is lower than the tanks. If you had a frame around and crashed the frame could buckle and damage the tank. There is a minimum clearance from the bottom of the tank to the ground. And both tanks are higher than that.

1664318502248.jpeg
 

cmcardle75

LIFE MEMBER
Jun 8, 2012
2,666
3,446
Reading
Funster No
21,386
MH
Riot Van Conversion
Exp
Since 2012
Propane tanks are massively stronger than anything else on your vehicle. Your fuel tank is made of crepe paper in comparison.
 

Basildog

LIFE MEMBER
Feb 21, 2018
2,217
3,625
Funster No
52,506
Whilst nearer the front subframe the plastic fuel tank is lower than the tanks. If you had a frame around and crashed the frame could buckle and damage the tank. There is a minimum clearance from the bottom of the tank to the ground. And both tanks are higher than that.

View attachment 670524
I would be interested in what ground clearance you actually have ?
The picture might be deceiving but as others have mentioned they certainly look low .

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Jul 6, 2009
1,835
2,279
Funster No
7,383
1664886871135.jpeg


This is the lowest one the other one is about 100 mm higher. The minimum clearance to comply is 225 mm I belive. This is the mounting for the Fiat heavy chassis the horizontal straps are 8mm.
 

Basildog

LIFE MEMBER
Feb 21, 2018
2,217
3,625
Funster No
52,506
View attachment 673171

This is the lowest one the other one is about 100 mm higher. The minimum clearance to comply is 225 mm I belive. This is the mounting for the Fiat heavy chassis the horizontal straps are 8mm.
That’s fine it was that other picture making it look low 👍
200 is the minimum clearance.
 

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