Hello I'm after advice on the installation of a secondary hot water system . The system will be suppling five bathroom s, a kitchen , cloakroom and utility room in a barn conversion. I usually install on a small domestic level so this is a bit bigger than the norm.
The hot water and heating system is being installed my a renewables company . They propose to install a 500 litre unvented cylinder and accumulator .
I'm just doing the first fix for the bathrooms and the rest of the plumbing in the property . This system will definitely need a secondary hot return system.
My query is with the pipe sizing.
I'm proposing to install 35 MM hot flow from the cylinder up to the first two bathrooms ( individual hot bathroom supply's 22 MM ) , then reduce down to 28 MM for the remaining three bathrooms .
The secondary return will be in 28 MM from the cylinder and reduce down as required by the last bathroom.
I intend to install locksheild valves on the returns at the outlets for balancing and fully insulate all pipe work.
Am I right with 35mm hot pipe work or will 28 MM be enough?
The hot water and heating system is being installed my a renewables company . They propose to install a 500 litre unvented cylinder and accumulator .
I'm just doing the first fix for the bathrooms and the rest of the plumbing in the property . This system will definitely need a secondary hot return system.
My query is with the pipe sizing.
I'm proposing to install 35 MM hot flow from the cylinder up to the first two bathrooms ( individual hot bathroom supply's 22 MM ) , then reduce down to 28 MM for the remaining three bathrooms .
The secondary return will be in 28 MM from the cylinder and reduce down as required by the last bathroom.
I intend to install locksheild valves on the returns at the outlets for balancing and fully insulate all pipe work.
Am I right with 35mm hot pipe work or will 28 MM be enough?
