25mm Distance between CDP and cold feed to hot water, 25mm Distance between overflow and water level, Neoprene rubber sealing grommit around vent pipe, Screened vent, 25mm Cold distribution pipework connection, 50mm FOV connection, Service valve, Insulation against heat and cold, 25mm Distance between FOV and overflow, Full way gate valves, Screened overflow/warning pipe with dip pipe below the water level, Close fitting lid.

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