How water problem

[Mrast]

Hi all,

I have just had my bathroom refitted - part of this refit was a new bath.

The old bath had a mains fed thermostatic mixer shower valve and separate bath taps - i had no issue previously with this setup.

My new bathroom has done away with the separate bath taps and got a wall mounted thermostatic bath and shower mixer tap
Buy Premier Thermostatic Wall Mounted Square Bath Shower Mixer Tap Chrome Online

Since this has been put it the hot water goes cold for about 15 seconds every now and again.

My wife was just in the shower so i stood at watched the boiler..... this is what i saw..........

Boiler problem when shower on - YouTube


Further to this - i didnt catch it in the video but still with the shower on and hot, the demand on the boiler for hot water stops completely and left me with just a green power light - then it would fire back up about 20 seconds later and this is the point the shower water would go stone cold temporarily.

There is 22m copper going from the boiler up to the bathroom but somewhere under the bathroom floor it is then reduced to 15mm copper - and this 15 mm copper runs to the new taps (same pipe work for the old tap, just slightly altered to remove the branch offs for the old bath taps.)



Any body any idea what could be wrong please, or any suggestions on what i could check?

Not normal for the boiler to keep igniting every 25 secs or so like shown in the video surely?

Many Thanks in advance

 

[Mrast]

Tried 3 different heads including mine and the ignition behaviour is better on 2 of them but still happening - just less frequently than on mine.

On mine i removed a plastic noggin thing from the end of the shower head and this has increased pressure from the shower massivly - didnt sort out the igniton issue though.

On 1 of them aswell i had to hold the shower knob up for about 10 seconds before it would stay up and not revert to sending water through the tap filler.

Also noticed tonight that if i only turn the tap pressure dial half way then the boiler behaves the same way - only when the dial turned on full does the boiler not play up.

Dont know what this proves wither but while the shower is on if i open up another hot water tap full blast it cuts the shower off and sends the water out the bath filler instead.

Think im just going to return the tap as faulty.

It clearly isnt right.

Agreed?

 

[Howsie]

Either that or poorly designed.

 

[Mrast]

Update:

P.O.S tap is being collected Monday to go back to the company for a refund.

I have plumped for a Grohe Essence Single Lever Bath Shower Mixer from a local supplier.

Fingers X'd

 

[Howsie]

Right choice IMHO.