[Neil Grainger]

Hi all

any idea's what would caused my water pump to start making slight knocking noise whilst on, pressure is still fine. Machine is an allte advantage.

cheers

Neil

[Kinver_Clean]

If it is the 135 pump it probably is the diaphragm wearing out.
They are simple to fit and should be available for around £25. I would get one now so that when the pressure falls you have one to fit.