interesting fault with combi

[mutley racers]

just started getting a very strange phenomenon when using the taps in the understairs toilet. If one turns on both taps at the same time, the system starts thumping and the water comes out in spurts. If one then turns off one tap the other stops also. But no where else in the house. It's not mixer taps either, seperate hot and cold.

Am sure I have read of this fault on here before but I cannot seem to drag it up in the posts.

 

[Howsie]

Vented or unvented my dear fellow? The later at a guess.

 

[mutley racers]

Combi boiler so unvented. That's why I am casumped (not sure if that's a word or not)!

 

[Riley]

Are they new taps? I replaced some for a custard and they suffered really weird vibrations and water spurts at both hot and cold. Replaced the guts of both taps and problem sorted.

 

[mutley racers]

No, not new taps. I fitted them with the boiler last yr. I am also thinking the taps as it is only these ones which have the issue. I am confused why both taps are affected when its seperate hot and cold taps. Not a mixer

 

[Howsie]

What happens with other outlets in that room.

 

[mutley racers]

What happens with other outlets in that room.

There is only a loo in there and that is fine

 

[Howsie]

So they are the highest outlets in the house?

 

[mutley racers]

So they are the highest outlets in the house?

No, a bath shower sink and toilet are upstairs and all unaffected

 

[Alex Pelton]

hot and cold wrong way round into the boiler?

 

[REDSAW]

its like not enough water flow to boiler, the taps are 't'ed from the rise to boiler from mains so plenty of cold then when hot taps on there is not enough to fill boiler!

that would cause air spurts?????

 

[lame plumber]

So they are the highest outlets in the house?

I wonder where Howsie comes on the Darwinian ladder, if the loo is understairs? :29:

 

[lame plumber]

are they cheaper 1/4 turn ceramics, Ive had weird experiences when they wear, of one turning the other on when closing etc, renewed guts and all ok for a while

 

[mutley racers]

its like not enough water flow to boiler, the taps are 't'ed from the rise to boiler from mains so plenty of cold then when hot taps on there is not enough to fill boiler!

that would cause air spurts?????

But it has been fine for a yr now. So why would it just start happening?

 

[Howsie]

I wonder where Howsie comes on the Darwinian ladder, if the loo is understairs? :29:

Oh dear God! <Walks off cliff>