Water pressure (1 Viewer)

Jan 28, 2019
12
17
Funster No
58,263
MH
C class
Exp
Since 1994
My Shurflo pump has good Initial pressure but a.most immediately drops to a trickle. Any ideas please
 
Apr 22, 2018
6,853
12,636
Herts.
Funster No
53,503
MH
Adria Coral lowline
Assuming a pressurised system, then it sounds like a weak pump. It will store the pressure in vessel, and pipework, then be purely what the pump can put out. Check filter, and intake incase blocked.
 
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Sep 17, 2020
948
3,153
Totton
Funster No
75,977
MH
Bailey Autograph 745
Exp
Since Sept 2020.
Agree, some sort of restriction. If it's on hot and cold, then it's either a filter on the pump inlet, or between the pump outlet side and the T where the hot and cold feeds separate.
 
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OP
OP
Namron
Jan 28, 2019
12
17
Funster No
58,263
MH
C class
Exp
Since 1994
Thanks for the replies pipework, is all OK so I suspect landy Andy is right. A blockage on the inlet side.

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Nov 13, 2011
1,491
3,585
Lincolnshire
Funster No
18,889
MH
PVC
Exp
30 years
If you don't find a restriction, just wizz the pump off, connect a length of hose to the inlet, drop the hose in a bucket of water and power it up. You will then know if it is the pump or system at fault.

Geoff
 
Upvote 0
May 7, 2016
7,372
11,997
West Sussex
Funster No
42,951
MH
Malibu Van 640 LE K
Exp
Since 2003
It could possibly be sucking air as well as water from the supply side. Pressure can be built up in the pipe work from the pump to the taps when they are closed but as soon as the taps are open the pump might have difficulty maintaining pressure and flow if it is also sucking air. The small clear plastic filter cover next to the pump is a favourite for getting cracked over the winter, it is hard to drain all the water out of it without removing the cover, making it prone to damage even in a drained down system.
 
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