Would it be worth putting isolation valves either side of a 3 port valve to aid swapping if needs be. Theres an isolation on the incoming supply due to the pump isolation.
Thanks, another question I have. There is a gate valve as a bypass between the 3port valve. Is this really need as there is no pump over run. The gate valve looks buggerd so was looking at changing too a auto bypass. Or renewing the gate valve
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