Bath and basin mixer tap

[McNulty]

Hi there,

I'm a plumber who is a bit confused...not hard I know. I've fitted my new bathroom suite not long ago, say 2/3 months, new taps, bath, basin etc. Tested and all worked great.

But Tbh I don't really use it because we use the ensuite all the time, so I filled the bath for the first time since tested as always have showers in ensuite but thought I'd give the new bath a go and only got Luke warm water from the new mixer tap...starts off real hot for a few seconds then goes Luke warm, this also happens with he new basin mixer, both taps are 'Scudo Descent Mixer taps', brand new. I fitted the new ensuite before the main bathroom with a new suite and all works great, also re fitted the kitchen, again tap is great, but just the main bathroom taps are playing up.

Now We have had the combi boiler serviced about a month ago, and there was a fault with it as hot water was passing into the heating pipes, so every tap was Lukewarm, that's been fixed and all other taps are great, except bath and basin in main.

So this is telling me that it's the new taps? Researched and not got a lot out of it, some people saying there are safety settings in mixer taps?

Like I said I am a plumber and fit bathroom all the time but never come across this before, shower mixers sure, but not taps...am I missing something simple here? Any help would be great

Thanks

 

[Chalked]

Yes missing something very obvious.

try turning the bath tap on a small amount.

Your bath filler is passing more than your combi can provide.

 

[dancinplumba]

Hi what KW is your boiler ?

 

[McNulty]

I tried that, still no good.

 

[McNulty]

It's a glow worm 30ci plus

 

[Ch4 plumbing]

Check that when they turned the water back onto the boiler they opened the valve up fully.

 

[jaydebruyne]

Check that when they turned the water back onto the boiler they opened the valve up fully.

Wouldn't that affect all taps though? Not just a couple..

 

[Ch4 plumbing]

Depends how the taps mix the hot and cold water.

 

[dancinplumba]

Do you have the same taps on ensuite basin ?

 

[jaydebruyne]

Maybe a tmv built into the tap? I know tmvs can be hot initially and then adjust to a cooler, safer temperature.. Just throwing out an idea :thinking:

Any way of testing the temp before it hits the tap? From the flexi maybe?

 

[Chalked]

Could be mixing through your existing en suite shower mixer? Can you isolate it?