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Total Members Voted: 3

[chrisgixer]

Can we start fresh,what hot water system i.e cylinder,elson tank,? where pump is situated,and where is cold storage tank

Boiler is a Worcester condenser
Water tank is a hot only Emershion on the landing, with the pump sited next to it.
Cold water tank is in the loft directly above it.

Pump feeds all pipes, including showe mixer tap on the bathroom wall, except the kitchen inlet mains to kitchen tap and dishwasher.

There's is a water softener in the garage under the boiler. So kitchen tap must be mains fed for cold. I'm not having one of those poxy drinking water taps I hate them.

[martin42]

What make and model of pump ?

[chrisgixer]

Video of tap behaviour, or lack of.

http://i344.photobucket.com/albums/p326/chrisgixer/297C7F0E-FD28-4CA5-9EA8-45C4110F5F59-23362-000009C43DE09BD4_zps201861b4.mp4

Monsoon 3bar

[Andy H]

Ahh. Doesn't appear to be blocked then

Did you mention something about a non return valve? If there is one then bin it.

[martin42]

Personally would use that pump for the showers and then use a single impeller pump for rest of hot water taps,although it say can be used for your purpose,it seems like the pressure solenoid switch isn't sensing when the tap is asking for water

[chrisgixer]

Ahh. Doesn't appear to be blocked then

Did you mention something about a non return valve? If there is one then bin it.

Yes just before the tap iirc.

[chrisgixer]

Personally would use that pump for the showers and then use a single impeller pump for rest of hot water taps,although it say can be used for your purpose,it seems like the pressure solenoid switch isn't sensing when the tap is asking for water

Specific to that tap, yes.

Shower hot and cold tap, bathroom sink hot/cold mixer tap, and down stairs loo cold(you saw) and hot all flow fine when turned on.

[martin42]

Change non return valve could be faulty.

[chrisgixer]

Just to be clear(er) the downstairs loo tap cold in the video is also connected to the pump, and flows fine.

In order to get the kitchen tap to flow, leave it open, turn on any other tap in the house or indeed if a loo has been flushed or anything that does cause the pump to turn, then the kitchen hot will flow. Because the tap is open, and the pump is now turning, due to the cold tap turned on as in the video, then the kitchen hot tap flows.

[chrisgixer]

Change non return valve could be faulty.

Non return was installed to help the flow problem. It made no odds. Sadly.

[Andy H]

Ahh. Doesn't appear to be blocked then

Did you mention something about a non return valve? If there is one then bin it.

Yes just before the tap iirc.

I reckon the spring in the non return valve is a bit fierce. I can't think which regulation demands that it be installed but there probably is one
In the first instance I would have the guts out of the non-return valve to see if it is the cause. If it is a legal requirement that it be there then I would shop around and find a replacement with a weaker spring.

[chrisgixer]

Ahh. Doesn't appear to be blocked then

Did you mention something about a non return valve? If there is one then bin it.

Yes just before the tap iirc.

I reckon the spring in the non return valve is a bit fierce. I can't think which regulation demands that it be installed but there probably is one
In the first instance I would have the guts out of the non-return valve to see if it is the cause. If it is a legal requirement that it be there then I would shop around and find a replacement with a weaker spring.

See my previous.

In other words. Tap refused to flow. Non return installed. No change.

To add, the pump was installed after the tap. The tap did flow, just, if agitated, or there would be a pause.

Since the pump was installed, the tap now refuses to flow on its own.

[Andy H]

Change non return valve could be faulty.

Non return was installed to help the flow problem. It made no odds. Sadly.

Trying to imagine how that might work
Was this before or after the pump was fitted?

[chrisgixer]

Tap fitted 10 years ago. It paused but would flow eventually.
Pump fitted with new bathroom a couple of years ago. Tap stopped flowing.
Non return fitted a year ago, no change.

Boiler due for service in a couple of months, so will grab plumber for another go at the tap while he's here, if there's another thing to try, so to speak.

[chrisgixer]

Theory behind non return was that maybe pressure would reduse in the pipe as the hot water cooled. Suction would withdraw the water from the tap end, so was less likely to start to flow.

I never said it was a good idea just a desperate one while plumber was here for the last boiler service.