Toilets continuously refilling after boiler install

[cadmunkey]

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!

 

[ShaunCorbs]

Dirt on the washer

 

[cadmunkey]

Dirt on the washer

Can you elaborate a bit more? Dirt on which washer? Do I need to replace every fill valve?

 

[Last Plumber]

As Shaun says, either soiled washer or worn washers.

 

[ShaunCorbs]

Best get the installer back but might cost you

 

[cadmunkey]

Best get the installer back but might cost you

They already came back once to fix a leak Just found a youtube video showing how to clean the fill valve washers so thanks for the suggestions guys much appreciated.

 

[Best]

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

 

[cadmunkey]

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

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?

 

[ShaunCorbs]

New valves require

 

[cadmunkey]

New valves require

OK, can you recommend any that are suitable? Wish the installers told me this!

 

[cadmunkey]

Fluidmaster on Screwfix say suitable for high and low pressure systems so I am guessing these will be fine?

 

[Best]

Fluidmaster on Screwfix say suitable for high and low pressure systems so I am guessing these will be fine?

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

 

[cadmunkey]

Thanks Best, I can order those from Amazon for delivery tomorrow. Cheers bud.

 

[Best]

Thanks Best, I can order those from Amazon for delivery tomorrow. Cheers bud.

Careful that they fit in cistern without catching side.
You don’t want a load of brand new fillvalves you end up having to sell on eBay

 

[cadmunkey]

Careful that they fit in cistern without catching side.
You don’t want a load of brand new fillvalves you end up having to sell on eBay

The cisterns are large so plenty of room, they should be fine. Cheers!

 

[Best]

The cisterns are large so plenty of room, they should be fine. Cheers!

That’s good. Just some cisterns (large or small) have the hole very close to corner.

 

[Welder]

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

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.

 

[Sharp Point]

Modern boilers are supposed to do that, it keeps the pans clean. It was a new partnership idea between armitage shanks and boiler manufacturers, it’s to overcome the problem of the 6 litre flush.

 

[Best]

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.

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.

 

[Welder]

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.

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
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

 

[dan_the_plumber]

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]

If they turned your cold mains off. They may have opened it back up too far. Try reducing it back slightly.

 

[Stigster]

If they turned your cold mains off. They may have opened it back up too far. Try reducing it back slightly.

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.

 

[Harvest Fields]

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.

Only said it because I have had old style pro45b’s pass like this before

 

[cadmunkey]

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.