I'm having a 'below sink' unvented water heater installed in the loft. It needs a pressure relief valve installed in the pipework along with it. Has the drain coming from the PRV & tundish got to be copper? or can it be PE-X barrier pipe?
4xpaws said:I'm having a 'below sink' unvented water heater installed in the loft. It needs a pressure relief valve installed in the pipework along with it. Has the drain coming from the PRV & tundish got to be copper? or can it be PE-X barrier pipe?
4xpaws said:Thanks for comment.
One reason amongst others is too long a pipe run is needed to fit thermal store. 30m+ run needed. Its for 3rd floor and storage cylinder's in basement.
4xpaws said:Secondary return -what's all that about? Returning to where?
Fraid not, they come with a PRV and you have to allow 4 meters of supply 15mm pipe for expansion back up the supply pipe before a draw off on said supply.........or 2 metres of 22mm pipe I would run copper and use a 22x35 reducer as a tundish.......in fact I`ve done 2 now ,as they are not covered by unvented certificating which I aint gotjay1 said:does it need to have prv and tundish if it is storing less than 15 litres, im pretty sure its doesnt need to.
A DHW secondary circulation pump can be fitted to a thermal store heat bank.
You haven't answered the main quetion of what it's for.
with a PRV and you have to allow 4 meters of supply 15mm pipe for expansion back up the supply pipe before a draw off on said supply.........or 2 metres of 22mm pipe
You want to use a 10 litre unvented heater to run a bathroom?
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local