Thank you for the explanation. Is it fairly expensive to upgrade to a two pipe system from a one pipe, especially if you are also upgrading to a combi boiler?
Water would only be pumped round the pipe not through the radiators. It travels into/through the radiators via convection and you wouldn't want anything to slow this down, so locksheilds should be fully open. You would need to oversize later radiators to allow for the heat loss from earlier radiators.
Thank you for the explanation. Is it fairly expensive to upgrade to a two pipe system from a one pipe, especially if you are also upgrading to a combi boiler?
On a one pipe system with radiators in series, would it be necessary to balance the system via the lock shield valve on each radiator,?
Water would only be pumped round the pipe not through the radiators. It travels into/through the radiators via convection and you wouldn't want anything to slow this down, so locksheilds should be fully open. You would need to oversize later radiators to allow for the heat loss from earlier radiators.