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Old 01-23-2018, 09:06 PM   #111
stubones99
Guru
 
City: Melbourne, FL
Join Date: Dec 2014
Posts: 1,731
Quote:
Originally Posted by johnma View Post
hooking up a flow restrictor such as an orifice or gate valve prior to the boat hookup WILL NOT reduce the pressure in the line. it will only reduce the flow if you have a fitting blow off inside the boat. You would need a pressure reducer with numerous moving parts that can fail do to a freeze. Pressure across an orifice is only reduced when flow is moving across the orifice. (Bernoulli's Principle). once you turn off a faucet inside the boat the pressure throughout the boat is the same as dockside pressure. If you don't believe me put a pressure gauge on both sides of your gate valve or orifice.
John
I don't think anyone said a restrictor would drop the pressure but it will slow the sink rate of the vessel if something catastrophic happened on the pressure water system with dock water pressure filling your boat. It might give your bilge pumps a chance.
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