Freshwater system problem

Kelpie

Well-known member
Joined
15 May 2005
Messages
7,767
Location
Afloat
Can anybody help me diagnose a problem with a freshwater system? There's a pump, a pressure switch, and an accumulator tank. Recently the pump has been failing to kick in, and I was finding that a wee wiggle of the pressure switch was generally sufficient to make it spring back into life. But the other day the opposite happened- the pump just began to run continuously, even though the tap was off.

Does this sound like I need a new pressure switch? I notice that there's a turny knob thing on it, might that be of help?
 

ffiill

Active member
Joined
5 Sep 2007
Messages
3,284
The pressure switch is adjusted by the knob.Turn the tap full on and operate the knob to see if it has any effect.
The real big problem I experience is because the pump spends months not in use the brushes in the electric motor stick.Sometimes all it needs is a good spin by hand and usually you can do that in situ by removing the pump body and accessing the drive spindle.
The other issue can be a leak in the system.Several years ago my pipes froze and split in a most obscure place.@
 

Len Ingalls

New member
Joined
6 Dec 2014
Messages
651
Location
N.B.,Canada
Can anybody help me diagnose a problem with a freshwater system? There's a pump, a pressure switch, and an accumulator tank. Recently the pump has been failing to kick in, and I was finding that a wee wiggle of the pressure switch was generally sufficient to make it spring back into life. But the other day the opposite happened- the pump just began to run continuously, even though the tap was off.

Does this sound like I need a new pressure switch? I notice that there's a turny knob thing on it, might that be of help?

Sounds like points (contacts ) in P-Swx to me. Sandpaper if accessible. Replace P-Swx otherwise.
Another possibility- the P-Swx pressure sensing tube/passageway is blocked with corrosion crud.

Cheers/ Len
 

KellysEye

Active member
Joined
23 Jul 2006
Messages
12,695
Location
Emsworth Hants
You might need to take the pump apart it could be the pressure switch, which I would replace, or a broken diaphragm. If it runs continuously turn it off quickly or the motor will burn out.
 

Kelpie

Well-known member
Joined
15 May 2005
Messages
7,767
Location
Afloat
Sounds like points (contacts ) in P-Swx to me. Sandpaper if accessible. Replace P-Swx otherwise.
Another possibility- the P-Swx pressure sensing tube/passageway is blocked with corrosion crud.

Cheers/ Len

Thanks, where would I find the contacts? I take it you don't mean the wires that connect the switch to the pump?
 

SandgroperWA

Member
Joined
22 Feb 2010
Messages
59
Location
Perth Aust. RPYC
I had the same problem. Cleaned and replaced the spade clips / electrical connectors. Drove me nuts. Failed just as I got in the shower, bought a complete new pump and switch. About $230 AUD. No dry showers any more! Keeps me and more importantly my girl happy.
 
Top