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Hi all, I have a wood burning stove with a back boiler piped to heat a vented, indirect hot water tank, 28mm pipe work.this was meant to be a gravity system but because of the way it was routed it did not work. I have now fitted a pump which works fine. I want to fit a pipe stat to stop the pump...

Hi I want to restrict the flow on my pumped multi fuel back boiler system, is there a preference as to which gate valve I close, on the flow or return side of the pump. Thanks.