I wonder if anyone can shed some light on this problem....
I am fitting a new water pump into my van. The old one is still working but is very noisy. I have purchased a new pump that when tested outside of the van using a bucket of water does appear to run quieter once the initial priming has finished.
Here is my problem. When I replace the old pump with the new pump the water pressure is far less then the old existing one even though is is rated higher.
Old pump is a Shurflo - 45PSI and 3.1Bar
New Pump is Quick Flo Profession Grade Pump 55PSI and 3.8Bar
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 said
02:15 PM Oct 17, 2015
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.
It looks like I have a spare pump now too
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 said
03:51 PM Oct 17, 2015
I wonder if mounting on some flexible, rubbery might help?
Aussie Paul.
revemike said
04:27 PM Oct 17, 2015
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 said
04:20 AM Oct 18, 2015
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 said
05:21 AM Oct 18, 2015
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 said
08:05 AM Oct 18, 2015
To reduce the noise a little try to wrap a small peice of insulwool around with duct tape? cheers
revemike said
09:58 AM Oct 18, 2015
Thanks for all these suggestions. I will certainly follow up on them when I have more time.
Sarge9 said
10:58 PM Oct 18, 2015
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 said
03:06 PM Oct 19, 2015
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 said
02:02 PM Oct 21, 2015
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 said
02:58 PM Oct 21, 2015
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..
I wonder if anyone can shed some light on this problem....
I am fitting a new water pump into my van. The old one is still working but is very noisy. I have purchased a new pump that when tested outside of the van using a bucket of water does appear to run quieter once the initial priming has finished.
Here is my problem. When I replace the old pump with the new pump the water pressure is far less then the old existing one even though is is rated higher.
Old pump is a Shurflo - 45PSI and 3.1Bar
New Pump is Quick Flo Profession Grade Pump 55PSI and 3.8Bar
I have plumbed it exactly the same.
Any thoughts as to what I might be doing wrong?
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.
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.
It looks like I have a spare pump now too
I think I will build an enclosure for it and use it when I need to pump water from a creek when free camping.
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
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
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
To reduce the noise a little try to wrap a small peice of insulwool around with duct tape? cheers
Thanks for all these suggestions. I will certainly follow up on them when I have more time.
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
that sounds like a good idea