[spotless2000]

Hi guys & girls

Can anyone offer advise to the following problem please.

I use a 60 psi Flojet pump and on my last job in Friday the pump would not switch off.   Normally when I close the valve you can hear the pump stop a couple of seconds later.

There was no sign of any leaks in the system.

Would I be right in suggesting the pressure switch has failed?

If so, how easy is it to fit a new one & should I fit new diaphragms at the same time?

(I've got a spare pressure switch on standby)

I've got new customer to go to Monday and it's a big job.

Any help would really be appreciated.

Thanks.

Steve

[P @ F]

Are you saying when you close the valve the pump would normaly stop ?
If so this would mean your pressure is hitting 60psi and the switch is doing its job , i would say then that your pressure switch has burnt out .
If the above is right , it means you are not on a varistream , i am not either .
What i have is a return to tank valve , when i turn off my tap whatever water is not going to the brush head is sent back to the tank , the pump does not switch off thus saving my pressure switch .

 Rich   P @ F

[spotless2000]

Hi Rich

Yes, when I close the valve the pump would normally stop.

No, I'm not on a varistream and I don't have a return to the tank - maybe that is something I should consider.

I remember reading a post from Alex G saying that he didn't have a varistream or a return in his system and relied on the pressure switch.  I think he also said that his pressure switch had lasted a few years!

This one has lasted approx 5 months! 

Have you every fitted a pressure switch?  Any tips?

I'm going to try and replace it today.

Thanks

Steve

[Londoner]

Switches will always burn out. Get a varistream, you wont regret it. As well as the on off function the varistream lets you adjust your flow and will save you lots of water.

[spotless2000]

Rich

the pump does not switch off

Does this not put more pressure / wear and tear on your pump?

[Alex Gardiner]

Hi Spotless,

It is a very easy job to change the pressure switch, just a case of undoing the screw on the end and replacing. As the switch has gone so quickly it was certainly faulty, so return it to whence it came as these pumps come with a 6 month warranty.

I have been running my flojets now for 5 years with no varistream/bypass etc. and they are still going strong. However some may find that they do not last as long, I may just be strangely fortunate with all 4 of our pumps.

Alex

[spotless2000]

I've changed the pressure switch and diaphragm - fingers crossed, everything seems to be running OK!

Thanks for your help everyone!

Alex - you have email.

[Jeff Brimble]

Alex do you think its to do with water in equals water out, approx thereby not much strain on the diaphragm or pressure switch ? How much water at the brush head do you use ?

[P @ F]

i suspect the time your pressure switch will last will depend on your type of work , eg if your doing big jobs with lots of glass your pump will not be on and off as much as it would with 3 bed semis all day .
My round up till now has been 95% domestic , on and off all day long and the switch is now 12 months old .

 Rich   P @ F

[Jeff Brimble]

You dont need a pressure switch there are many pumps that dont have them. We wfpers think we adapt pumps that have been ther thro history, nothing new.

[Alex Gardiner]

Hi Jeff,

I use about 1.75 litres per minute at the brush head. But sometimes I use just 1 pole on 1 pump and other time 2 poles on 1 pump.

I have always found it beneficial to match your hose and pole numbers to the flow rate of the pump.

Here is a rough guide;

60psi flojet can power 1 pole on either a 100 or a 60 metre microbore hose or 2 poles on a 60 metre microbore.

100psi flojet can usually power any combination but we use it with 2 poles and 2x 100 metres of microbore.

Alex

[spotless2000]

Hi Alex

Did you get my email?

Steve