[mufcglen]

finished last job of the day and thought i'd do 1-2 for tomorrow, got to the job turned the controller on and pump was whizzing away but no flow, turned controller right up for a few minutes nothing, im going to swap it for a spare pump i got but this ones only about a year and half old, is there anything i can check or replace?

[Dave Willis]

air in the system I bet. Layflat tank by any chance?

[Small but perfectley formed]

could be air locked or diaphragm

[Tom White]

Air in the system; last job of the day is a good combat indicator, especially as Dave says, if it's a layflat tank.

Make sure your pump is as close to the van floor as possible; mine's right on the floor.

Just let your pump run without the reel hose attached and it'll clear (as long as the tank's water level is above the outlet).

[matthewprice]

Might be totally wrong but on mine the black wire to black wire on controller was not connected properly and pump ran but no water

[Spruce]

There could be a grain of dirt inside the pump and is causing the non return valve to not seat properly. Like the good old needle and seat on the old carburetors of yesteryear.

You maybe able to blow a jet of water through it with your garden hose in the direction of flow.

Otherwise open up and have a look. Be vigilant as there is a hairpin spring inside behind the non return valve which is easily lost. Your a mechanic so it should be an easy investigation.

Change of subject.

I thought of you over the Christmas break. I wish it just took me 45 minutes to change the cambelt on my Citroen Relay.

[Marc Whitbread]

Sounds airlocked I get it quite a lot at end of day just suck on out part of the pump and then usually comes flooding out...

[slap bash]

Tank on empty by any chance.