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Aftermarket pump that does not 'hunt'?

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Aftermarket pump that does not 'hunt'? Empty Aftermarket pump that does not 'hunt'?

Post by Rocky Fri Jul 28, 2023 12:46 pm

Following on from the topic on the Shurflo pump going on/off when on low flow, has anyone fitted an aftermarket water pump that does not sound like a machine gun when turned on for a small flow?

Shurflow seems the most popular, but there is a more expensive Fiamma pump, and no doubt others.  Would be interested to hear of any that don't hunt when only turned on a little.

Thanks
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Post by FreelanderUK Fri Jul 28, 2023 12:49 pm

Fit a fiamma or whale surge damper this should sort out the pulsing of the pump

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Post by Paulmold Fri Jul 28, 2023 1:06 pm

My Duo has Flojet pump (fitted by AS at build). No pulsing but does continue for several seconds after taps turned off.

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Post by Rocky Fri Jul 28, 2023 1:12 pm

Paulmold wrote:My Duo has Flojet pump (fitted by AS at build). No pulsing but does continue for several seconds after taps turned off.

Paul - is that inside or outside the water tank?  Do they fit those now?

Thanks
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Post by IanH Fri Jul 28, 2023 1:20 pm

My Warwick Duo's had external pumps located by the Truma heater. Don't recall any noise issues at all
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Post by Paulmold Fri Jul 28, 2023 1:27 pm

Rocky wrote:

Paul - is that inside or outside the water tank?  Do they fit those now?

Thanks
It's inside next to truma combi. Not fitted by AS as they use submersible in tank.

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Post by Peter Brown Fri Jul 28, 2023 2:35 pm

Totally confused.

Your 2023 should have an in tank whale pump that is silent and gives a very smooth water flow.

Having had Shurflo and Flojet diaphragm pumps for nearly 20 years, the whale that we had since changing vans in November last is perfect. I am aware of the risk of running the pump in an empty tank causing it to fail and require a dropped tank to replace so if that happens, I've been careless.
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Post by Rocky Fri Jul 28, 2023 3:55 pm

Peter Brown wrote:Totally confused.

Your 2023 should have an in tank whale pump that is silent and gives a very smooth water flow.
Yes, that's correct Peter.  

However, the dealer, knowing that the in-tank pumps fail regularly and it's a b-gg-r of a job to change them, fits an external pump.  It's a 20psi Pentair Shurflo which is no doubt ultra reliable, but is like a machine gun on low flow - even after adjustment.  Hence my asking the question.

Hope you are no longer confused .....   up!
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Post by Peter Brown Fri Jul 28, 2023 4:30 pm

Thanks for the clarification.

I'm very happy with the Whale solution and have a friend who swapped to a diaphragm pump but quickly swopped back to Whale because of problems with pressure variations on his installation.

If you use the whale filler system you also have a spare pump with you as both pumps are the same.
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Post by Sparks Fri Jul 28, 2023 5:47 pm

I changed my Whale in-tank pump some time ago to a Shurflo Aquaking pump which is a 4 diaphragm pump and very quiet by comparison with the normal 3 diaphragm type, it is also adjustable if you do get any oscillation.
If you fit one of these it is not necessary to remove the in-tank pump, but it does works a bit better if you do.
I did remove mine and was amazed that Autosleeper had not fitted a stainless steel hose clip, it was absolutely solid with rust.
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Post by glyne lock Sat Jul 29, 2023 8:39 am

A flojet and the surge tank stops the problems been talked about [You must be registered and logged in to see this link.]
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Post by rgermain Sat Jul 29, 2023 11:13 am

I ditched the expansion tank, after the bellow turned inside out and fitted a new bellow, but found it made not an iota of difference to my setup. One less thing to go wrong, others may disagree.
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