[Banbury Window Cleaning]

hi peeps i posted the other day about a problem with my setup.
After wiring the pump directly to the battery it seems to work fine altho the water pressure coming out of it is way too high.
Its a shurflow pump. Is there anything I can tweak to turn the pressure down as the van has to be usable tomz
any help or links would be great thanks 

[herbiefatboy]

I would think you need a varistream to control  the water flow.

[Banbury Window Cleaning]

yes i have but it has bust and wont have new one until monday 
however today we just hooked up the pump direct to the battery with a on/off switch however the pressure was too high so just wondering if i can turn it down on the pump somehow??

[Dave Willis]

Only by making a bypass back to the tank. You could throttle it on the pole valve I suppose but it wouldn't be ideal.

[Banbury Window Cleaning]

oh bugger!! caus today the water nearly put the glass thru lol
so how do peeps without a varistream deal with this issue?

[Dave Willis]

With a bypass back to the tank. The pump runs flat out but the excess pressure goes back to the tank via a valve.

[Banbury Window Cleaning]

ok and how do i do that?? 

[elite mike]

you need to put a t junction in it , and run the other hose to the tank if that makes sense.

[Banbury Window Cleaning]

yep that makes sense!! now where does this need to go? after the pump but before the hose reel?? surely that will still be very high pressure? thanks for the help 

[elite mike]

yes needs to be after the pump.

you will either have to pinch hose or have a tap fitted to your pole hose.

i have tried to put a link up from matts diy site but CIU  wont let me  :

[mark dew]

Get an on/off 1/2 inch valve and put that between your tank and your pump. Then use that to control your flow.

[Banbury Window Cleaning]

ok i have it all set up to keep the van working today however one quick question.........
the pump just constantly runs even when we turn the pole taps onto the off position is this ment to do this? I thought once it was restricted the pump would turn off?

[Dave Willis]

Pump will always run flat out without a controller. That's why you need a bypass. The only time the pump will stop is when it reaches maximum pressure for the pressure switch to come in. Provided you have it wired up of course.

[Banbury Window Cleaning]

and thats what it aint doing 
if we close the tap and let it run to see if it turns itself off then all it does is keep going and blow the connectors on the setup 

[Spruce]

and thats what it aint doing 
if we close the tap and let it run to see if it turns itself off then all it does is keep going and blow the connectors on the setup 

Have you 'wired' the pressure switch into the electric circuit? The pressure switch is at the bottom of the pump. Its in a small housing that sits on top of the pump head. It has 3 terminals. Ignore the middle one on a Shurflo pump.

If you have done that then the pressure switch is either faulty (contracts in the microswitch arched together) or you connectors are blowing off before the cut off pressure is reached.

To check the microswitch, unscrew the 3 screws that hold the housing in and carefully remove the housing - pse don't loose the components that activate the microswitch.
You will see the microswitch in the housing which you will be able to prise out. Test with a multimeter. If the switch is faulty Maplin will have a replacement.  Get a 'handful' of terminal connectors as well.