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Toilets continuously refilling after boiler install

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cadmunkey

cadmunkey

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Had a new boiler installed 3 days ago, since then all four toilets in the house have had a slow drip into the bowl.
Today however all 4 are filling fast and not stopping, just continuously filling into the overflow pipes. Had to turn 3 of them off at the supply.
All toilets just have a standard fill valve, can anyone shed any light on what may be causing this? Cheers!
 
Dirt on the washer
 
Best get the installer back but might cost you
 
Best said:
Was your boiler a changeover from a system that used tank water - to a combi boiler?
Just was thinking maybe mains high pressure water going to toilets that were low pressure might have required toilet valves to be modified or replaced
Click to expand...
Yes, exactly that. From a system with tank to a combi-storage boiler. We have very high cold water pressure here that needed to be reduced for the new boiler does that mean I need to find new valves?
 
cadmunkey said:
Fluidmaster on Screwfix say suitable for high and low pressure systems so I am guessing these will be fine?
Click to expand...

I use Fluidmaster Pro45b (brass tailed) valves if they fit in cistern without the vertical float catching on side of cistern.
But there are similar fillvalves also suitable for high pressure.
I think Screwfix do not have the Pro version in their normal catalogue and only bring them in if ordered.
The Pro version has a red coloured top cap and also comes with a flow reducer insert for high pressures, which the similar looking Fluidmaster does not.

Poor that your gas boiler installers didn’t advise you at the very least beforehand
 
Best said:
Was your boiler a changeover from a system that used tank water - to a combi boiler?
Just was thinking maybe mains high pressure water going to toilets that were low pressure might have required toilet valves to be modified or replaced
Click to expand...

Sorry, me again.

Just because the OP had a low pressure HW system does NOT mean it was low pressure cold to the toilet. Whilst it is entirely possible, it is AS likely that he had LP HW & HP CW. I have come across both in all areas of the UK.

To then complain that the original installer was wrong is, IMHO, also wrong because none of us here know the facts. By talking this way we condemn a person who may be entirely innocent.

Again IMHO, it is as entirely likely that having turned off the house supply to do this change, when turned back on it has washed debris into the valves - as we have ALL experienced - and is therefore the 'fault' of no one as on one could have predicted or seen that the supply had debris lying in it.

Personally, I'd try to understand who it was piped before replacing willy nilly. If it was an HP system then I'd simply replace the washers/diaphragms rather than replace all fill valves. ;)
 
YorkshireDave said:
Sorry, me again.

Just because the OP had a low pressure HW system does NOT mean it was low pressure cold to the toilet. Whilst it is entirely possible, it is AS likely that he had LP HW & HP CW. I have come across both in all areas of the UK.

To then complain that the original installer was wrong is, IMHO, also wrong because none of us here know the facts. By talking this way we condemn a person who may be entirely innocent.

Again IMHO, it is as entirely likely that having turned off the house supply to do this change, when turned back on it has washed debris into the valves - as we have ALL experienced - and is therefore the 'fault' of no one as on one could have predicted or seen that the supply had debris lying in it.

Personally, I'd try to understand who it was piped before replacing willy nilly. If it was an HP system then I'd simply replace the washers/diaphragms rather than replace all fill valves. ;)
Click to expand...

Agree, I was only mentioning it was a possibility of tank water fed toilets converted to mains. But it is a strong possibility.
Would seem strange that all 4 toilets now overflow, if dirt had been disturbed. Never has that number happened to me.
I know if toilets have older type part3 valves, they could simply have a hp seating and new diaphragm washer fitted, but terrible valves on high pressure and too noisy.
My region, most houses unless fairly modern had mainly tank fed toilets, so common here for new combi to require toilet fillvalves altered.
 
Best said:
Agree, I was only mentioning it was a possibility of tank water fed toilets converted to mains. But it is a strong possibility.
Would seem strange that all 4 toilets now overflow, if dirt had been disturbed. Never has that number happened to me.
I know if toilets have older type part3 valves, they could simply have a hp seating and new diaphragm washer fitted, but terrible valves on high pressure and too noisy.
My region, most houses unless fairly modern had mainly tank fed toilets, so common here for new combi to require toilet fillvalves altered.
Click to expand...

Not having a go Best (we are all only trying to help), but sometimes we jump to conclusions without being aware of all the facts - hey, I'm literally the world's worst for it - just don't tell my wife and youngest I admitted it tho :rolleyes:
I've had three go at once. He was a royal PIA tho and blamed me for stuff 'going wrong' 12 months later. I had to read him his fortune - something to do with sex & travel if I recall correctly :p
 
Hang on a second, we’re your toilets actually fed from a cold water storage cistern?
Or was the cistern just feeding the hot water storage tank?
Have you got a pressure reducing valve on the incoming main? Has it been adjusted recently?
 
Harvest Fields said:
If they turned your cold mains off. They may have opened it back up too far. Try reducing it back slightly.
Click to expand...

That'll only change how fast the valves are passing water, not actually stop it from happening, if high pressure is causing the valves to pass water. Adjusting the stopcock will only affect flow rate.
 
Sorry, thought I would come back and update this thread. I bought the new fill valves that Best recommended and when fit it completely solved the problem with all 4 toilets so I'm happy. Cheers and thanks for the advice.
 

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