I have an older water fed system which has a grunsford pump that needs replacing do i need any special tool to replace it.

James, March 2010

if no valves or stuck, get 2 new valves close them and undo old 1's on 22mm nut and fit the new one over real quick, its called a snatch, oh yeah bes makesure its cold and put some sheets down good luck, let us no how you get on, this is the easiest way

big jamboree, March 2010

There are three ways to change it, first get hold of a new Grunsford pump. turn both valves off at both sides of the pump, lossen the two big nuts that go on to the pump, some times come off ok other times they are very tight!
Second if you have the same pump ie same numbers, lossen the 4 allen studs on the pump head hit it with a hamer to break the seal lift off and fitt new one tighten the 4 studs wire up turn on and you are back in bussiness.
And some times they are right tight drain the whole system lossen the 22 mm nut on the valves and fitt a new pump and valves, refill.

erj, March 2010