[ftp]

Has anyone found a valve so they can bleed their system? I'm often getting inconsistant flow from my system when my tank drops below half full. I'm sure when I brake it allows the pump to gulp some air as the water sloshes forward. This then goes to the DI and so on. Could do with a self bleeding valve of some sorts to get the air out quickly.

[Neil Williams]

If you want to go down that route why not fit a one way valve just after the tank outlet, that'll keep the water in the pipework and stop it running back into the tank.

[ftp]

I think because my varistream is permanently on, it gulps the air when the oulet is exposed under braking. I could shut the valve after every job or switch the power off after every job I suppose. Once the air gets in it's a bugger to get through DI, strainer and then pump.

[Nathanael Jones]

I have a "T" fitted after my heater, one line goes to my reel, the other goes straight back to the tank via a valve. It was installed for heating the tank on frosty nights, but works brilliant for bleeding the system too.

[windowswashed]

Totally agree with Neil, fit a one way valve to solve the problem.

[ftp]

But a one way valve will still let air in in the direction of the water flow would it not?

[john tomkins]

I had exactly the came problems and it was driving me mad.
Got a 1/2" double barb pvc check valve from dual pumps about £14 delivered (can get cheaper brass ones from a plumbers merchant) this along with mounting the pump and hose as low as possible, totally stopped air getting in, I now have no problems whatsoever.

To answer your last question..... the check valve is under spring pressure, it won't let air/water through unless its more than 0.07 bar
http://www.dualpumps.co.uk/images/Catalogue_PDFs/Check_Valves.pdf
215 item PVC check valve

[ftp]

Splendid 

[Tim82]

I just disconnect the pipe thats connected to the outlet on the pump box until it clears the air lock. simple i know but it does the trick

[john tomkins]

I just disconnect the pipe thats connected to the outlet on the pump box until it clears the air lock. simple i know but it does the trick

I used to love doing that 3 to 4 times a day :

[Tim82]

used to?