Hansen hot water overflow on mains

Submitted: Saturday, Jan 02, 2016 at 14:18
ThreadID: 131251 Views:2189 Replies:3 FollowUps:1
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Can anybody help me we have a Hansen hot water unit which I have only ever ran on tank pump have plumbed in Mains and it pushes water out the hws overflow even with the mains turned down at half pressure of what the pump runs at can anyone help
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