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Plumbing

Is this unvented cylinder discharge pipe to code?

Anonymous user 03/03/2024 - 3.38 PM

I live in a shared block in the UK. My upstairs neighbour has installed an invented cylinder, but the discharge pipe looks to me as if it is not to code. I think it is safe enough but I need to know if it doesn't meet the regs, because a surveyor might pick up on this and require re-work. Ideally I need to post a picture, but the discharge pipe is as follows. 22mm copper pipe exiting the wall at 1st floor level straight into an old plastic Marley hopper, which feeds into Marley plastic downpipe, which goes straight to the sewer. I believe the plastics should be BS-marked to indicate heat resistance (which they are not), or they should have been replaced with metal. Is this to code?

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4 Answers

Anonymous user

This is not to Regulations, as it should not have been put into a Plastic Hopper, if it goes off and splashes back it could be dangerous as it could scald someone as the Temperature is around 120°C. The pipe should be turned towards to face the wall.
Answered20 May 2021
4

Anonymous user

The discard pipe should terminate at ground level roughly 50 mm from the ground with a 90 degree bend as it comes through the wall and preferably with a cage over the pipe to stop it getting blocked or damaged. It doesn’t have to terminate over a drain or near a drain as the purpose of the discharge pipe is in the event that the cylinder would exceed temperature of 90 degrees it will open the safety valve and discharge the water or the water pressure exceeds 3 bar or there about. I hope this helps
Answered20 May 2021
1

GD Plumbing

Rating: 5 out of 5
Harlow
The discharge pipework should go into a metal hopper which in turn should run into a gulley. This should be in line with the G3 hot water system regulations. Alternatively the pipework should have been of a size diameter that it could be run directly into a gullet or to the ground and have a guard on it to protect from anyone touching it as the water being discharged would be over 100 degrees
Answered31 May 2021
0

Nestor Plumbing And Heating

Rating: 5 out of 5
Norwich
Regulations state if being taken into a rainwater hopper and/or downpipe, they are required to be made of metal to withstand potentially boiling water. The installer needs to come back and either reroute or exchange the rainwater drainage to metal.
Answered4 June 2021
0