Fresh water system problem (1 Viewer)

[Gellyneck]

Just back from our last trip away in our 2013 Auto-trail Savannah and after nigh on three weeks of the water system working fine (hot, cold and toilet) all of them start spluttering so there seems to be air getting in somewhere.

Checked all the pipework, joints, pump, filter, etc and all seem bone dry which leads me to believe (and after reading various threads on here) there could be an issue with the pump with it letting water drain back down into the fresh tank.

Now for the questions,

• any other thoughts on what it could be?

Assuming it may be the pump I've searched online with no success in finding an exact replacement - model number is Shurflo 4029-181-A32. This pump seems to be a quad diaphragm model and is rated at - flow = 7.5l/m, shut off pressure = 20psi, amps = 3.5 max, 12v. I've found a number of triple diaphragm models, eg Shurflo Trail King 7 2095-204-112 & 412 rated at 20psi, 7.0l/m .

• Anybody know if the 4029 model is available and I'm just useless at searching?
• Is the 2095 model a suitable alternative?
• Any other options I should be thinking about?

Appreciate your help gang.

 

[PP Bear]

Any pictures available?

 

[PP Bear]

http://www.keller-pumpen.de/fileadm...32_und_4029-181-B32_SHURflo_KELLER-Pumpen.pdf

I replaced mine on a 2006 AT Dakota with this, worked fine.
Amazon product ASIN

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[Badknee]

IT will be cheaper putting a one way valve inline between tank and pump.

 

[Gellyneck]

Any pictures available?

This is what's currently fitted -

http://www.keller-pumpen.de/fileadm...32_und_4029-181-B32_SHURflo_KELLER-Pumpen.pdf

I replaced mine on a 2006 AT Dakota with this, worked fine.
Amazon product ASIN

Your link is to the "manual" for the fitted pump (great ). If I'm reading it correctly you say you've sourced and fitted a replacement one. Any link to where you managed to get it from?

Many thanks

 

[TheBig1]

unlikely to be the pump. it is more likely grit in the non return valve near the tank. only a couple of quid but often a right PITA to get at an replace. its only a plastic ball and a spring held inside a shaped piece of tube so can often be washed out under a tap at mains pressure, but once they start failing they will soon need replacing

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[Gellyneck]

IT will be cheaper putting a one way valve inline between tank and pump.

This is another option I had thought about but not sure I'll have enough space to fit as pipework disappears straight through the floor into the top of the tank.

 

[Gellyneck]

unlikely to be the pump. it is more likely grit in the non return valve near the tank. only a couple of quid but often a right PITA to get at an replace. its only a plastic ball and a spring held inside a shaped piece of tube so can often be washed out under a tap at mains pressure, but once they start failing they will soon need replacing

On checking the manual linked to by PPBear it says the pump includes a check valve. Would this be the same as a built-in non-return valve and therefore maybe not a valve fitted before the filter?
Pipework disappears straight through the floor into the top of the tank but, as you say, a bu**** to see and confirm this!

 

[PP Bear]

Found this on an overseas site, but worth investigating.

http://www.haardwaard.nl/shurflo-4000-serie-lpm-12v-bar-4029-181-b32-p-14511.html

Other thought is to talk with Shurflo over a replacement.

The link I sent gives an aftermarket fit....

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[PP Bear]

Or here for a few € cheaper.

I've ordered parts from Europe without any problems in the past and found them always very helpful.

http://www.kampeertotaal.nl/shurflo-pomp-serie-4000-7lpm-12v-1-4bar-35028.html

 

[TheBig1]

if it was me, i would cut the pipe as close to the tank as possible and fit an extra non return valve if possible. the problem is the last foot or so of pipework will drain back to the tank when the flow stops

 

[Gellyneck]

if it was me, i would cut the pipe as close to the tank as possible and fit an extra non return valve if possible. the problem is the last foot or so of pipework will drain back to the tank when the flow stops

Will crawl under, have a look see and let you guys know how we get on.
Thanks for your efforts.

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[Gellyneck]

Found this on an overseas site, but worth investigating.

http://www.haardwaard.nl/shurflo-4000-serie-lpm-12v-bar-4029-181-b32-p-14511.html

Other thought is to talk with Shurflo over a replacement.

The link I sent gives an aftermarket fit....
View attachment 160871

Already tried Shurflo but only referred me to Auto-trail. Will be giving them a shout tomorrow but wanted to ask the guys in the know first!

 

[irnbru]

Interesting thread. Alan has almost the same problem on his autotrail but it's a possiflow pump.
Maybe this thread will help him too

 

[Gellyneck]

Just been reminded by another Funster that I hadn't given the final outcome of the problem (thanks John) so better late than never!
Not much of a solution right enough as it just seemed to resolve itself a couple of weeks later on our next trip.
Kinda guessing it was just a bit of grit sticking the valve open that cleared itself (as suggested by @TheBig1 above).

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[bigtree]

Just been reminded by another Funster that I hadn't given the final outcome of the problem (thanks John) so better late than never!
Not much of a solution right enough as it just seemed to resolve itself a couple of weeks later on our next trip.
Kinda guessing it was just a bit of grit sticking the valve open that cleared itself (as suggested by @TheBig1 above).

Lucky one, would have been funny seeing you try to crawl under the floor.

 

[Gellyneck]

Lucky one, would have been funny seeing you try to crawl under the floor.

Geoff Grub! (anagram).

 

[pappajohn]

This is what's currently fitted -
View attachment 160853



Your link is to the "manual" for the fitted pump (great ). If I'm reading it correctly you say you've sourced and fitted a replacement one. Any link to where you managed to get it from?

Many thanks

That's for the US market, not the EU.
It's rated at 2 AMERICAN gallons per minute... A US gallon is only 3.75ltrs

Try some of the RV dealers.

Oppps, just realised the thread is almost 2 years old.

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