I have just had an unvented cylinder fitted, and the T&P valve is connected as per regs via a tundish, and then into the soil stack using a copper pipe.
But I've had to ask the plumber to come back, because it looks like he hasn't done anything to prevent sewer gases from coming into the property via the tundish, and there is an odd smell in the cylinder cupboard.
From our quick chat on the phone, I'm not sure if he's familiar with so-called waterless valves, as recommended for this purpose, for example, here:
Guidance: Discharge from storage cylinders into pipework systems
(See also associated diagram below)
But when I have searched for such valves, there don't seem to be many advertised, and the HepVo ones for example get very poor reviews on Amazon, with people say they don't exclude sewer gases properly, or that they get blocked frequently.
So my question is, can anyone recommend a good one that is suitable for this purpose, in terms of temperature tolerance and reliability, and that is also readily available from plumbers' merchants?
But I've had to ask the plumber to come back, because it looks like he hasn't done anything to prevent sewer gases from coming into the property via the tundish, and there is an odd smell in the cylinder cupboard.
From our quick chat on the phone, I'm not sure if he's familiar with so-called waterless valves, as recommended for this purpose, for example, here:
Guidance: Discharge from storage cylinders into pipework systems
(See also associated diagram below)
But when I have searched for such valves, there don't seem to be many advertised, and the HepVo ones for example get very poor reviews on Amazon, with people say they don't exclude sewer gases properly, or that they get blocked frequently.
So my question is, can anyone recommend a good one that is suitable for this purpose, in terms of temperature tolerance and reliability, and that is also readily available from plumbers' merchants?