[rg1]

Its a 100psi shurflo pump and the last couple of days has been making a knocking noise when its running. Increase, decrease the flow rate, it makes no difference. Works ok but just a bit worried its gonna go bang.

Any ideas?

Thanks
Rob

[R W C™]

Mine does the same, think this starts to happen as they get old, had mine nearly 2 years.

[Ian Lancaster]

Get a spare before it breaks down.

I've just changed my five year old 60psi Flojet for a two year old 100psi Sureflo

[Roy Harding]

My 100psi Flowjet is now in its 7yr and still going well. but I do have a spare inline ready to go.

As been said get another as a spare as it will cost you a days pay if it stops.

Roy

[beefyguy124]

mine done the same
take the bottom of  the pump off and check
the carbon brushes usually they clog up with dust
might just need a clean  hope this helps

[Spruce]

Perhaps the screws that hold all the pieces together on the diaphram end need tightening up.

[rg1]

Thanks guys, I will have to take a closer look at it.

Rob