L
Len
Posted this last week in the wrong forum so this is a (modified) repeat and I like to three who answered that post.
Currently have a very old open system gas boiler which services the hot water system, via a storage cylinder and a ring of 11 radiators.
Needs to be replaced and I have selected the plumber to carry out the work. Others who quoted for the work mentioned that the gas feed would have to be upgraded to 22mm (based upon the visual inspection of 1.6m of 15mm pipe rising from the floor to the current boiler). Only one asked about the current pipe work feeding to this 15mm length.
The proposed condensing boiler to be installed is the Vaillant Ecoplus 618 which has an inlet gas pressure requirement of 20mbar on a 15mm connection.
The position of the new boiler is up in the loft which will require a 6mtr extension to the current gas pipe.
The feed from the street to the gas meter is 28mm steel reducing to 22mm copper and the outlet from the meter is 22mm copper back to 28mm steel that then goes under the floor (solid) across to the garage and then is fed up to a T in the floor - a length of 4.3m. The T splits the gas to the 15mm for the boiler and then goes under the floorboards to feed a supply to the cooker which is not used.
Unfortunately the split happens under the dining room floor which is covered in wood laminate. To access the joint will require the room to be cleared and the whole floor being lifted.
My neighbour had his boiler moved to the loft about 2 years ago and the installer used 15mm pipe all the way.
Have read numerous feeds about 15mm vs. 22mm and the Corgi changes to the regulations and have got confused..
I do not know the gas pressure into the house – but surely the size of the gas inlet pipe should be enough to feed the required mbar pressure required by the boiler?
Thank you any guidance you can offer.
Regards
Currently have a very old open system gas boiler which services the hot water system, via a storage cylinder and a ring of 11 radiators.
Needs to be replaced and I have selected the plumber to carry out the work. Others who quoted for the work mentioned that the gas feed would have to be upgraded to 22mm (based upon the visual inspection of 1.6m of 15mm pipe rising from the floor to the current boiler). Only one asked about the current pipe work feeding to this 15mm length.
The proposed condensing boiler to be installed is the Vaillant Ecoplus 618 which has an inlet gas pressure requirement of 20mbar on a 15mm connection.
The position of the new boiler is up in the loft which will require a 6mtr extension to the current gas pipe.
The feed from the street to the gas meter is 28mm steel reducing to 22mm copper and the outlet from the meter is 22mm copper back to 28mm steel that then goes under the floor (solid) across to the garage and then is fed up to a T in the floor - a length of 4.3m. The T splits the gas to the 15mm for the boiler and then goes under the floorboards to feed a supply to the cooker which is not used.
Unfortunately the split happens under the dining room floor which is covered in wood laminate. To access the joint will require the room to be cleared and the whole floor being lifted.
My neighbour had his boiler moved to the loft about 2 years ago and the installer used 15mm pipe all the way.
Have read numerous feeds about 15mm vs. 22mm and the Corgi changes to the regulations and have got confused..
I do not know the gas pressure into the house – but surely the size of the gas inlet pipe should be enough to feed the required mbar pressure required by the boiler?
Thank you any guidance you can offer.
Regards
