I need an unvented engineer to replace the D2 pipe with a pipe sized at least 28mm and must terminate in a safe place. The discharge pipe from the combination valve needs to be replaced so it joins onto the D1 pipe above the tundish. The D2 pipe needs a vertical legnth of pipe of at least 300mm from the tundish and the 1st elbow. There is at least 4 elbows needed for th D2 pipe . There is also a fault with the thermal controls or the temp & pressure relief valve.
The engineer came out yesterday following a leak in the airing cupboard and had cut and capped the water pipe going into the tank, I am unable to use my heating and hot water system.