overflow only when both taps open...!!

[razor123]

ok...have found the 'tundish'..it looks wet inside and a drip is going through it almost constantly...should this be so...?
when I turn bathroom taps on it makes no difference...when both hot and cold are running in kitchen the overflow runs a lot..
I take it the tundish is connected to the overflow..?

 

[GavThePlumber]

No it should not be dripping, when was this cylinder last serviced?

 

[razor123]

oh right....don't know when it was last serviced...didn't even realize emersion heaters had to be..!!

 

[Hugh Jaleak]

Type you have is an 'unvented' hot water cylinder which will supply hot water at mains pressure. They do need an annual check/service to ensure everything, including essential safety devices, is working correctly. You will need an engineer with a 'G3' ticket which qualifies him/her to work on this type of system.

 

[razor123]

thanks Hugh...will get onto that over the weekend...

 

[GavThePlumber]

You have a good system, the alternative is a vented type or low pressure system, with additional cold tank in loft, where you have hot water dribble out the taps and shower.

 

[Madrab]

View media item 70023Just in case you don't know what the tundish is

Clever cloggs

Well you never know

 

[Madrab]

duplicate

 

[JayPage]

sounds like your temp/pressure relief valve is faulty. The reason its probably running when your kitchen tap is on is because the inc mains pressure is higher than the hot water pressure. This is probably as the pressure reducing valve on the cold supply to the cylinder hasnt been set correctly thus giving unequal pressures. Let us now how you get on when you get your annual check.

 

[gigz]

View media item 70023Just in case you don't know what the tundish is

Clever cloggs

Well you never know

I meant how you got the arrow on the pic

 

[Madrab]

Oh I see Gigz, just used the 'draw on image' app in here

 

[razor123]

Big thanks to everyone.....I will book a service and get it all checked out and post the results here
again thanks all

Dave (razor) Sharp