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Isolation valves for winterizing
- Merkinbrumsky
- Deck Hand
- Posts: 67
- Joined: July 29th, 2021, 11:33 pm
- Vessel Info: 1985 Carver Voyager
- Location: Georgian Bay
- Has thanked: 37 times
- Been thanked: 24 times
Isolation valves for winterizing
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- CYO Supporter
- Posts: 5958
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: Isolation valves for winterizing
My AC system is a bit of a challenge to winterize as I don't have separate overboard discharges for each unit. The only one with a thru-hull discharge is the one at the bow, the other two go into a manifold that discharges through more than just a small fitting on the side of the hull. So I can't backflow through separate thru-hull fittings for example. I winterize through the strainer which feeds all three units. The problem is the forward unit discharges antifreeze long before the other two do which is a waste so I get someone to plug the forward discharge after they see antifreeze come out and wait until antifreeze comes out of the other two manifolds, it's a bit of a pain. For this reason I'm considering installing valves on each supply line at the distribution manifold above the AC water pump so I can isolate two AC units when running antifreeze through each one.
- Merkinbrumsky
- Deck Hand
- Posts: 67
- Joined: July 29th, 2021, 11:33 pm
- Vessel Info: 1985 Carver Voyager
- Location: Georgian Bay
- Has thanked: 37 times
- Been thanked: 24 times
Re: Isolation valves for winterizing
- bud37
- Admiral
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- Joined: April 23rd, 2015, 10:22 pm
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Re: Isolation valves for winterizing
As far as the fresh water system, you need a quick disconnect next to the tank then a screen before your fresh water pump. That is where you can put the pink in that system. Those disconnects will pay off later on pump changes/maintenance etc.
There are many variations on all of this....I mean if you are going to keep this boat for a long time then by all means put in tees and fittings and hoses to make the winterizing/maintenance as easy as possible.
EDIT....sorry don't forget to install a shut off valve at the tank.
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- CYO Supporter
- Posts: 5958
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 454 times
- Been thanked: 1665 times
Re: Isolation valves for winterizing
- Merkinbrumsky
- Deck Hand
- Posts: 67
- Joined: July 29th, 2021, 11:33 pm
- Vessel Info: 1985 Carver Voyager
- Location: Georgian Bay
- Has thanked: 37 times
- Been thanked: 24 times
Re: Isolation valves for winterizing
-
- CYO Supporter
- Posts: 5958
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
- Has thanked: 454 times
- Been thanked: 1665 times
Re: Isolation valves for winterizing
If you install a three way valve between the tank and the fresh water pump, convert that section to a quick connect system using the appropriate fittings and lines. Valves leak over time and at least with that system you can put a quick connect cap on the end of the wintering intake hose in case your valve starts leaking, otherwise your pump will keep cycling even when you're not calling for water. In fact, when you can, start converting different sections of your plumbing to the quick connect stuff, way easier to deal with.
I use a portable pump to winterize my boat, so all I do is remove the inlet fitting at the pump which is a quick connect, I hook up my pump which draws from a pail of antifreeze and start winterizing. I use this pump/pressure system to do all systems including fresh water, engines, genny, heads, air, dockside water, etc. I keep everything I need in a winterizing tote in the garage, grab it and go, super easy.
- Merkinbrumsky
- Deck Hand
- Posts: 67
- Joined: July 29th, 2021, 11:33 pm
- Vessel Info: 1985 Carver Voyager
- Location: Georgian Bay
- Has thanked: 37 times
- Been thanked: 24 times
Re: Isolation valves for winterizing
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