New water pump

revemike · Senior Member

New water pump

Yuglamron · Guru

It may be stating the obvious but does your system have a pressure reducing valve somewhere after the outlet from the pump..

I have just replaced the old Shurflo in my MH with a new one. My original was purchased in the USA ( No longer available) and I bought a different model here in Australia,with higher PSI / LPM too. Turns out that there is a pressure reducing valve in the lines between the pump and the sink/Shower etc.

Just a thought.

PS

After replacing the whole unit at $300 I found out that the USA pump could be repaired with a new diaphragm here. The same kit fits lots of their different pumps. Cost $60 inc. Postage. At least I now have spare pump.

revemike · Senior Member

Thanks Yaglamron.

I have discovered what the problem was (just 5 mins ago).

The problem was in the fitting to the pump from the water tank. Even though it had the same thread it was not tightening sufficiently and therefor the pressue was being lost. Once I attended to this all is now well.

Sadly the noise is not any better though. I think that the main reason for this is that the pipes are not placed correctly causing the vibration to travel through them. The tanks are a long way from the faucets so there is a lot of pipe to carry the sound. hmm

It looks like I have a spare pump now too smile

I think I will build an enclosure for it and use it when I need to pump water from a creek when free camping.

aussie_paul · Guru

I wonder if mounting on some flexible, rubbery might help?

Aussie Paul. smile

revemike · Senior Member

aussie_paul wrote:
I wonder if mounting on some flexible, rubbery might help?
Aussie Paul.

Thanks Paul, the pump does already has rubber feet. I also tried placing this in sone extra padding but it did not make a huge difference. I think the issue is the hoses that carry the water to the taps are not fitted as well as they should have been by the manufacturer. If I had a place to get under the van comfortably I would re-do this as well. That unfortunately in in the too hard basket.

The new pump is a considerable improvement though. It was worth the cost and effort.

-- Edited by revemike on Saturday 17th of October 2015 04:52:59 PM

Aus-Kiwi · Guru

Slide some air conditioning foam tube insulation over pipes or critical areas?
Hey at least you hear it working ... Lol.

Maybe some air in lines and its hammering, also if there's any coiled pipe it tends to flex with pumping action, variances in pressure ..

-- Edited by Aus-Kiwi on Sunday 18th of October 2015 04:20:51 AM

-- Edited by Aus-Kiwi on Sunday 18th of October 2015 05:41:24 AM

Peter_n_Margaret · Guru

These pumps are best plumbed with very flexible hoses to reduce noise transmission via the hose.
If possible, they are also best not screwed down at all, just hanging on the hoses or just sitting on a very soft foam pad.

Cheers,
Peter

dishlicker · Senior Member

To reduce the noise a little try to wrap a small peice of insulwool around with duct tape? cheers

revemike · Senior Member

Thanks for all these suggestions. I will certainly follow up on them when I have more time.

Sarge9 · Senior Member

Mike, what surface is the pump screwed to... if it is a ply cupboard wall it will act like a drum skin. glueing/screwing a piece of heavier 5 ply or 19mm pine or some other easy to work with timber to the mounting surface (wall partition, or floor) my help take the drum effect out. You will still need the rubber feet as well. (I mounted mine under the van to the chassis)

good luck

Sarge

revemike · Senior Member

Sarge9 wrote:
Mike, what surface is the pump screwed to... if it is a ply cupboard wall it will act like a drum skin. glueing/screwing a piece of heavier 5 ply or 19mm pine or some other easy to work with timber to the mounting surface (wall partition, or floor) my help take the drum effect out. You will still need the rubber feet as well. (I mounted mine under the van to the chassis)

good luck

Sarge

Hi Sarge,

Mine is mounted on the floor of the van inside a cupboard under the fridge. Under the van sounds like a good option actually. I might look at that possibility.

What I attempting to do is to reduce the noise so that I do not disturb neighbours when parked is a quiet free camping environment. The noise does not concern me so much but I don't like to ruin the peace of others around me.

The current 'fix' has certainly improved what was there before but there is still room for improvement.

Mike

Aus-Kiwi · Guru

Some ply wood sikoflexed to floor as base for pump gives good insulation . I made the screws holding it just off the board so it doesn't translate any noise..

revemike · Senior Member

Aus-Kiwi wrote:
Some ply wood sikoflexed to floor as base for pump gives good insulation . I made the screws holding it just off the board so it doesn't translate any noise..

that sounds like a good idea