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Temp and Pressure Rlease Valve Leaking!
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Temp and Pressure Rlease Valve Leaking!
Hello
Can anyone please help me with some advice.
The T & P valve is leaking and letting water leak . An engineer from the home cover of UW (UTILITY WAREHOUSE) came and said the T&P valve needs to be replaced. But, since the boiler is unvented , i am told i am not covered by the policy.
Is this valve easy to replace? Can anyone please advice me . I am thinking of doing it myself. Posted some pictures.
Many thanks
Andrew.
Can anyone please help me with some advice.
The T & P valve is leaking and letting water leak . An engineer from the home cover of UW (UTILITY WAREHOUSE) came and said the T&P valve needs to be replaced. But, since the boiler is unvented , i am told i am not covered by the policy.
Is this valve easy to replace? Can anyone please advice me . I am thinking of doing it myself. Posted some pictures.
Many thanks
Andrew.
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Andy1974
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Temp and Pressure Rlease Valve Leaking!
1. That is an unvented hot water cylinder. You are not allowed to work on it without the necessary qualifications and current accreditation to a G3 scheme.
2. If by leaking you mean it is letting water through into the tun dish then it indicates a fault with the safety system(s) of the cylinder. The fault needs to be addressed as a matter of urgency, and the cylinder should not be used until this has been done.
2. If by leaking you mean it is letting water through into the tun dish then it indicates a fault with the safety system(s) of the cylinder. The fault needs to be addressed as a matter of urgency, and the cylinder should not be used until this has been done.
andy48
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Temp and Pressure Rlease Valve Leaking!
Post by Someone-Else »
Andy48 is not wrong, you need to cure the cause not the symptom.
Unvented cylinders do need a person with a "g3 ticket" to work on them, although they look like normal cylinders they are not, they are under great pressure, get something wrong (i.e. DIY
) as people have found in the past, they explode (not often, each one can only explode once) but when they do apart from the damage, they shower everywhere with scolding hot water.
The up side is you get a great shower if you have one, and some can run two showers at the same time, but like anything not simple, they must be looked after.
Unvented cylinders do need a person with a "g3 ticket" to work on them, although they look like normal cylinders they are not, they are under great pressure, get something wrong (i.e. DIY

The up side is you get a great shower if you have one, and some can run two showers at the same time, but like anything not simple, they must be looked after.
Above are my opinions Below is my signature.
Would you hit a nail with a shoe because you don't have a hammer? of course not, then why work on anything electrical without a means of testing Click Here to buy a "tester" just because it works, does NOT mean it is safe.
If gloom had a voice, it would be me.
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Would you hit a nail with a shoe because you don't have a hammer? of course not, then why work on anything electrical without a means of testing Click Here to buy a "tester" just because it works, does NOT mean it is safe.

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Inept people use the QUOTE BUTTON instead of the QUICK REPLY section
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Someone-Else
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Temp and Pressure Rlease Valve Leaking!
Hi Andy48
Many thanks for the quick reply.
yes its letting water through into the tun dish.
The engineer who came, said, the valve must be faulty as some grit may have stuck in the valve mechanism. 10 years back when i was with British Gas home care, the same problem happened and the engineer then replaced this valve. So i was wondering if i can do this. You have answered the question . I can’t do it by law . I will contact a plumber. Thanks.
Andrew.
Many thanks for the quick reply.
yes its letting water through into the tun dish.
The engineer who came, said, the valve must be faulty as some grit may have stuck in the valve mechanism. 10 years back when i was with British Gas home care, the same problem happened and the engineer then replaced this valve. So i was wondering if i can do this. You have answered the question . I can’t do it by law . I will contact a plumber. Thanks.
Andrew.
Andy1974
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Temp and Pressure Rlease Valve Leaking!
Also by the way, when i say it’s leaking , its not a torrential gush, but a small trickle which I noticed in the outlet pipe (located by the side of the house). This trickle is happening for some time ….
Andy1974
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Temp and Pressure Rlease Valve Leaking!
Post by Someone-Else »
No, you want a heating engineer, not a plumber. There is a difference, and as said ask to see the g3 ticket.
Oh, when I said explode, they can, but not mythbusters style, that was a different type and they fixed it so it would explode.
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- Andy1974 (Fri Jul 01, 2022 6:08 pm)
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Above are my opinions Below is my signature.
Would you hit a nail with a shoe because you don't have a hammer? of course not, then why work on anything electrical without a means of testing Click Here to buy a "tester" just because it works, does NOT mean it is safe.
If gloom had a voice, it would be me.
Click Here for a video how to add/change pictures
Inept people use the QUOTE BUTTON instead of the QUICK REPLY section
Would you hit a nail with a shoe because you don't have a hammer? of course not, then why work on anything electrical without a means of testing Click Here to buy a "tester" just because it works, does NOT mean it is safe.


Inept people use the QUOTE BUTTON instead of the QUICK REPLY section

Someone-Else
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Temp and Pressure Rlease Valve Leaking!
Hi S-E
I contacted the British Gas and they are sending an engineer today. Thanks for your help.
Bless You
I contacted the British Gas and they are sending an engineer today. Thanks for your help.
Bless You
Andy1974
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Temp and Pressure Rlease Valve Leaking!
Is my system Vented or Unvented. I have a tank in the loft, does it mean its vented.
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Temp and Pressure Rlease Valve Leaking!
Unvented system. You deffo need someone with a G3 cert to sort it. check out "gas safe register" for G3 certified engineers in your area. https://www.gassaferegister.co.uk/
a local indy will most likely be cheaper and more reliable than anyone from BG
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Verwood Handyman
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wine~o
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Temp and Pressure Rlease Valve Leaking!
But my loft also has black water tank (not a huge one ), may be 10 litre capacity. Unvented cylinder should not have any loft tank, isn’t that right?
Thanks
Thanks
Andy1974
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Temp and Pressure Rlease Valve Leaking!
Not necessarily Hot water from the unvented tank and Central Heating on a separate system from the sounds of it.
Verwood Handyman
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wine~o
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Temp and Pressure Rlease Valve Leaking!
On the cylinder it says, unvented , so it must be unvented i suppose.
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Andy1974
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Temp and Pressure Rlease Valve Leaking!
Your cylinder is unvented and the heating system is open vent.
Developers qent through a period of doing this so they wouldn't have to keep sending people round to repressurise the system in the case of microleaks
Developers qent through a period of doing this so they wouldn't have to keep sending people round to repressurise the system in the case of microleaks
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I think I'll take two chickens...
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Temp and Pressure Rlease Valve Leaking!
An Update
The British Gas engineer came this morning. He said the pressure release valve is faulty. He replaced the pressure releasing part (red part in the pic) of the valve housing. He also used a foot pump to fill air in the expansion vessel in the loft. He said the expansion vessel was flat. I don’t know why it went flat in the first place.
He said the T & P valve is ok and didn’t do anything with that.
Now the water is no more leaking into the tun dish (learnt a new term from this forum yesterday, Thanks)
Thanks to everyone who responded to the querry. Have a good day.
The British Gas engineer came this morning. He said the pressure release valve is faulty. He replaced the pressure releasing part (red part in the pic) of the valve housing. He also used a foot pump to fill air in the expansion vessel in the loft. He said the expansion vessel was flat. I don’t know why it went flat in the first place.

He said the T & P valve is ok and didn’t do anything with that.
Now the water is no more leaking into the tun dish (learnt a new term from this forum yesterday, Thanks)
Thanks to everyone who responded to the querry. Have a good day.
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Andy1974
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Temp and Pressure Rlease Valve Leaking!
Razor; “Your cylinder is unvented and the heating system is open vent.”
Does it mean my central heating system is Open vent? Only my hot water cylinder is unvented?
The UW home cover used a clause in their policy saying if the central hearing system is unvented they will not cover. So they refused to fix the problem. I had to go to British Gas to get the work done. Screen shot of the clause they used is posted .
Please clarify.
Thanks
Does it mean my central heating system is Open vent? Only my hot water cylinder is unvented?
The UW home cover used a clause in their policy saying if the central hearing system is unvented they will not cover. So they refused to fix the problem. I had to go to British Gas to get the work done. Screen shot of the clause they used is posted .
Please clarify.
Thanks
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Andy1974
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