[slap bash]

I have been dealing with Via Air for pump needs.Sam the chap thats helps me . Great service, called yesterday at 12 got the switch today/ Good pumps if you needing more water on the glass. I do quite a few conny roofs and one need a higher flow to move the crud on a nearly flat roof conny and these 10 liter a min pump are perfect for this job. So well done for the good service at Via air . Contrary to common belief: higher flow quicker cleaning, four jets wide brush and job done before you think.Get with the program.

[Smurf]

I have a 21 lpm 3000 psi pressure washer would that do?  

Failing that an outside tap pressure and flow rate work well too

[slap bash]

Wise ass.

[Matt.]

Maplin sell pressure switches, for pumps there about £3. Take your one off an they will find a match.
Loads of little gadget bits in there

[slap bash]

thanks Matte