I too have this problem. New Glowworm fitted in a recently re-developed property with a water meter about 30ft away in the street. I have no idea if there are dead legs but I there could well be as there apparently used to be a immersion tank and also wash basin in a bedroom.
Trawling round the web the consensus of opinion seems to be to fit a mini expansion vessel and a non return valve on the cold water inlet to the boiler.
Agile (aka Tony) above has suggested that the NRV should be fitted in the DHW outlet. A few others have also suggested this. Fitting it on the outlet would be so much more easy due to the configuration of the pipes under the boiler.
I was wondering why there was a split in opinion as to where the NRV should go ?
Any comments would be greatly appreciated as this issue seems to be very common.
Trawling round the web the consensus of opinion seems to be to fit a mini expansion vessel and a non return valve on the cold water inlet to the boiler.
Agile (aka Tony) above has suggested that the NRV should be fitted in the DHW outlet. A few others have also suggested this. Fitting it on the outlet would be so much more easy due to the configuration of the pipes under the boiler.
I was wondering why there was a split in opinion as to where the NRV should go ?
Any comments would be greatly appreciated as this issue seems to be very common.