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Potable Water/Raw Water Interconnect Modification

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Topic author Canada
Midnightsun
CYO Supporter
CYO Supporter
Posts: 278
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
Has thanked: 14 times
Been thanked: 60 times

Potable Water/Raw Water Interconnect Modification

Postby Midnightsun » May 17th, 2018, 8:52 am

Happens every now and then we run out of water in the tank after several days at anchor no matter how careful you are being there is only so much water on board. The main issue is the toilets will not flush as the draw is from the potable water tank and no water means no flush and an obligation to return to port.

The modification is to install a connection between the pressurized side of the potable water system and the pressurized side of the wash down pump. Using a solenoid valve and a filter to remove sediment and a few T connections is all it takes.

Will add a 5a breaker in my panel to energize the solenoid just below my water pump breaker as this one needs to be off and visa versa when deactivating it. If I want lake water, turn off water pump breaker, turn on solenoid breaker, done deal.

This will work well for us as our boating waters are fresh water and almost drinkable. The idea is to use the feature when away from port for several days knowing we will probably run out. Will activate it when we take showers and maybe when we do dishes, the idea being to use less water from the tank.
Last edited by Midnightsun on May 17th, 2018, 9:12 am, edited 3 times in total.
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos

User avatar

Topic author Canada
Midnightsun
CYO Supporter
CYO Supporter
Posts: 278
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
Has thanked: 14 times
Been thanked: 60 times

Re: Potable Water/Raw Water Interconnect Modification

Postby Midnightsun » May 17th, 2018, 8:58 am

This is the solenoid I am using. https://www.ebay.com/itm/1-2-NPT-12V-DC ... 2749.l2649

This is the breaker I am using. https://www.ebay.com/itm/NEW-Blue-Sea-7 ... 2749.l2649

This is the water filter I am using which is available on Amazon USA for $26 or Amazon Canada for $60 :censored: . the nice thing about this unit is it takes standard 10" x 2 1/2" filters which are dirt cheap. The unit for the application is perfect as the filter is 50 micron which is fine but not so much so as to block to quickly. I see no reason why I would need to change it out during the season but do plan on doing so each spring. There is already a strainer on the wash down pump intake so this will take out the bigger stuff before it sees this filter. The unit comes with no less than 3 cartridges which should keep you going for 3 years. The filter also incorporated a built in bypass valve in the head which is convenient for bypassing, or turning it off manually as can be seen in the picture.


Image
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos

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