SylvanLMP
Harold, good points BUT I think you should have also mentioned a “flow control valve”
Many so called heating guys have no clue to a near boiler piping installation or bother to even read about stratification of hot water molecules.
How many so called plumbers don’t even know how to put in a 27″ loop on domestic hot water installations or bother to install a low water cut off on a domestic hydronic boiler as it cost way to much to concern themselves on a safe installation.
If this boiler is being used for domestic hot water also then not only should there be a flow control valve ( I know about zone valves forget about them ) on the heating system piping but a Holby mixing valve also to temper the domestic water supply.
