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Old 07-08-2017, 06:59 AM   #1
City: gibraltar
Country: gibraltar
Join Date: May 2017
Posts: 9
sea water pump

The sea-water pump on our '73 GB 48' Classic has had it! It was positioned in the engine room, port-side for'd and comes on to the deck port-side by the anchor.

I intend to re-fit it using the now redundant for'd heads raw-water inlet so that it is almost directly under the point of use - no issues there I don't think.

Question is, what brand or specification would you recommend. Ideally it will need to activate when the hose is turned on - presumably via a switch operated by water flow? Not sure how all this works - any ideas please??

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Old 07-08-2017, 08:13 AM   #2
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City: Chicago, IL
Country: USA
Vessel Name: Bay Pelican
Vessel Model: Krogen 42
Join Date: Oct 2007
Posts: 2,994
Shuflow blaster washdown ($130 Amazon) is frequently used. While it has a pressure switch, it is best to have a separate on/off switch so that it is not always energized.

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Old 07-08-2017, 08:14 AM   #3
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City: Quebec
Country: Canada
Vessel Name: Bleuvet
Vessel Model: Custom Built
Join Date: Jan 2016
Posts: 3,859
I recently bought a Jabsco ParMax washdown pump, pressure switch is integrated to it.
The way it works, when you opens the hose, pressure goes down, switch turn the pump, same thing with you fresh water pump when you open the faucet.

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Old 07-08-2017, 08:29 AM   #4
City: Olympia
Country: USA
Vessel Name: The Good Life
Vessel Model: Monk 42
Join Date: Jun 2017
Posts: 8
We did the same upgrade to our MC-42, reusing the forward head's thru-hull .and adding a pump that goes to a faucet on the bow. Our mechanic selected a Jabsco 82905-0092 pump which is 70 psi and 5 GPM fax flow. It is wired through a breaker on the main 12v panel so we can deactivate it when not being used.
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