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Old 01-15-2018, 07:29 PM   #12
caltexflanc
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City: North Carolina for now
Join Date: Aug 2011
Posts: 6,348
You need to understand how YOUR boat is actually plumbed. A lot of advice was forwarded here based on how OTHER people's boats are plumbed. On my old Hatteras, there were OEM pressure reducers on the shorewater feed (adjustable) plumbed in line already. There was a check valve on the pump branch that prevented back feeding the pump (and the pressure switch as well). The tank was fed by a completely different intake and the tank outlet also had a check valve to prevent water from the pump side to back feed into it.. so that was MY boat's plumbing.
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