Another issue I have is a noisy water pump , wake the dead of a night . It is 7 years old , do you think it's on the way out. No vibration fixed properly to floor.
Is it getting air in pump on suction, inlet side ? Run M/T recently ? Has the mounting changed ? Is there anything touching pipes or pump ? Could be its due for retirement ? Does it clear after being run a while ??
It has made noise since I purchased recently , doesn't come on by itself , no air and mounts are good. Shurflo pump , I'm thinking pump itself might need replacing.
Thanks
They sort of have to me mounted firm but allowed to move it that makes sense . Mine is mounted on board sikoflexed to rubber the pump is bolted to board . The pipes are saddled to prevent vibration . Even plastic type can rattle . Is there an accumulator? Acts like a shock absorber.
It has made noise since I purchased recently , doesn't come on by itself , no air and mounts are good. Shurflo pump , I'm thinking pump itself might need replacing. Thanks
OK before you buy another pump,
Unscrew the black end where wires go to the switch, take black section off and remove rubber diaphragm,, look for dirt etc.
Clean f necessary, then push the round hard black section that operates the switch to see if switch goes on and off.
This is the most common area of failure.
PM me if you want assistance, I overhauled 2 this week.
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Why is it so? Professor Julius Sumner Miller, a profound influence on my life, who explained science to us on TV in the 60's.
The piston action of these common water pumps is the cause of the noise, jerking backwards and forwards and the noise factor is often increased by mounting them to a big sounding board like the van floor or cupboard wall. Even if a good antivibration rubber mat is used they still hammer. I mounted mine under the floor to a chassis cross member, on proper rubber with grommets on the bolts, I still find it embasingly noisy at night when cleaning teeth etc.
Hold it runnig in your hand it is quiet, bolt it to concrete not too bad, stick it in a caravan.... noisy. I have been tempted to hang it off a piece of car tyre under the van. Clearance is my problem.
The piston action of these common water pumps is the cause of the noise, jerking backwards and forwards and the noise factor is often increased by mounting them to a big sounding board like the van floor or cupboard wall. Even if a good antivibration rubber mat is used they still hammer. I mounted mine under the floor to a chassis cross member, on proper rubber with grommets on the bolts, I still find it embasingly noisy at night when cleaning teeth etc. Hold it runnig in your hand it is quiet, bolt it to concrete not too bad, stick it in a caravan.... noisy. I have been tempted to hang it off a piece of car tyre under the van. Clearance is my problem.
Sarge.
I wonder how it would go fixed to a piece of rubber matting suspended from top to bottom inside a cupboard?
Just overhauled 2 a couple of weeks ago, fietted a new one to van and checked a friends new one. The new ones were much quieter than previous models say 10-12 years ago. Problem is rearly electric motor itself but the 3 pump chambers generating the noise due to wear presumably on the drive plate.
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Why is it so? Professor Julius Sumner Miller, a profound influence on my life, who explained science to us on TV in the 60's.
"Plumbing must have a minimum Inner Diameter of 13mm [1/2]. Smaller ID plumbing will cause cavitation, high backpressure, low flow and noise."
That is ID not OD, how many vans meet that requirement ?
And "Reduce restrictions on the pump inlet and outlet. This includes any shut-off valves, winterizing valves and
elbows with smaller inner diameters."
This requirement is important, any restrictions in the suction side will cause the pump to work harder, and make more noise.
It is one of the reasons I try to encourage those to fix the non return valves already installed rather than fitting another smaller one giving even more inline restrictions.
