Pulsing Bathroom Tap - Help!!!

[JulianCR]

Hi - new to this forum so bare with me if anything is unclear,

But I am currently experiencing problem with a brand new bathroom mixer tap - the water keeps pulsing through it with the pump (newly installed) going on and off on and off etc.... As you can imagine this doesnt sound very healthy for the pump itself.

Please see the video below for the problem

[video=youtube;6oE2_1lByFI]http://www.youtube.com/watch?v=6oE2_1lByFI[/video]

I have found a temporary fix as the filter on the tap itself keeps blocking up - by cleaning the filter on the tap it then returns to working to normal. As all the other taps dont experience this problem by turning another tap on this also resolves the issue.

Any ideas?

 

[BLOD]

try fitting a check valve on the hot pipe coming out of the pump, I'd also check how many litres per minute you're getting out of the tap with the pump turned off - is it enough flow to work the pump flow switch ?

 

[Gray0689]

try fitting a check valve on the hot pipe coming out of the pump, I'd also check how many litres per minute you're getting out of the tap with the pump turned off - is it enough flow to work the pump flow switch ?

Agree with check valves

 

[jase158]

My first thing would be dirt in the pipe, try taking filter out and letting it run for 5 minutes, ish.

then replace filter, see if it works.

If this doesnt work but the tap works when the filter is out then try a different filter, (can be bought from plumb centre i.e.) or removing some of the filters(they normally have about 5 filters, although Removing them can sometimes break them if you don't know what you are doing), I find these new taps can really reduce pressure.

 

[jase158]

I mean the filters at the end of the tap, not the ones inside the tap.

 

[nysk2008]

Is it a flat you live in? Reason I ask is that ive seen this at a customers flat before and if i remember was cured by topping up the pressure at the expansion attached to the pump.

 

[Plumbstar Tom]

Non return valve for me too but I would Put it as close to the tap inlet as poss on the problematic side (h or c)I hope that's not a shower pump your using to pump the water to the tap by the way...

 

[leepoll]

Hi everyone, i'm new to plumbing and have been reading these forums with great interest. On reading this thread I see that the advice being given is to fit a check valve. So genuine question here, how would a check valve help to sort this problem? Thanks in advance.

 

[Plumbstar Tom]

pulsating when a pump is involved usually leads to the pump turning on and off

A pump starts up by the reed switches detecting a flow, however, when a CD type tap is turned off often a 'pressure wavwe' can occur send a wave to the pump which switches it on and sends the wave to the tap which is off so it goes back. etc etc

a check valve stops this

 

[leepoll]

Ahh ok thanks for that