Hi all, hoping that someone can help. I know similar questions have been asked a zillion times on forums, but I can't find a definitive answer for my bit of the equation.
I believe an unvented cylinder can be discharged into a soil stack via a tundish, a Hepworth trap, and via suitable polypropylene push-fit pipe certified to higher temperatures etc. I've read the english and scottish guidance, the NHBC technical guidance, and various manufacturer's installation instructions.
What I cannot find out, is more specifically what material the soil stack needs to be. The G3 regs say "the discharge pipe should not be connected to a soil discharge stack unless it can be demonstrated that the soil discharge stack is capable of safely withstanding temperatures of the water discharged", and I found something else suggesting this is at least 100 degrees.
So what material (other than cast iron) fits the bill? I have a (presumably fairly standard) internal PVC soil stack. Discharging externally isn't ideal for various reasons.
I should say I am not a plumber and I am not looking to do any work myself. I am a homeowner who likes to be as informed as possible, and I am trying to work out whether what has been proposed to me is up to code.
Any help or advice would be greatly appreciated.
I believe an unvented cylinder can be discharged into a soil stack via a tundish, a Hepworth trap, and via suitable polypropylene push-fit pipe certified to higher temperatures etc. I've read the english and scottish guidance, the NHBC technical guidance, and various manufacturer's installation instructions.
What I cannot find out, is more specifically what material the soil stack needs to be. The G3 regs say "the discharge pipe should not be connected to a soil discharge stack unless it can be demonstrated that the soil discharge stack is capable of safely withstanding temperatures of the water discharged", and I found something else suggesting this is at least 100 degrees.
So what material (other than cast iron) fits the bill? I have a (presumably fairly standard) internal PVC soil stack. Discharging externally isn't ideal for various reasons.
I should say I am not a plumber and I am not looking to do any work myself. I am a homeowner who likes to be as informed as possible, and I am trying to work out whether what has been proposed to me is up to code.
Any help or advice would be greatly appreciated.