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post #1 of 6 Old 12-17-2012 Thread Starter
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Atlantic Marine Hot Water Tank and Fresh Water Winterization

So I winterized the freshwater system on my Bristol 40 yesterday. Normally on my previous B 32 I would have (easily) blown compressed air throw each line and then drain the hot water tank and the job was done. I tired that on this boat and no matter how I tried I could not get the tank to drain. We disconnected both the inlet and the outlet, we forced air in the outlet which is above the inlet, and nothing came out. Anyone have a tank Iike this? It was made by Atlantic, whom I can't find online other than an address and a phone number which does not work. The instructions which came with the boat say to undo the inlet and open a faucet for air an the unit should drain. It didn't.

Thoughts?

Dr. S.
"Eh Winds Up, Doc?"
Bristol 32
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post #2 of 6 Old 12-17-2012
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Re: Atlantic Marine Hot Water Tank and Fresh Water Winterization

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Originally Posted by Dcneuro View Post
So I winterized the freshwater system on my Bristol 40 yesterday. Normally on my previous B 32 I would have (easily) blown compressed air throw each line and then drain the hot water tank and the job was done. I tired that on this boat and no matter how I tried I could not get the tank to drain. We disconnected both the inlet and the outlet, we forced air in the outlet which is above the inlet, and nothing came out. Anyone have a tank Iike this? It was made by Atlantic, whom I can't find online other than an address and a phone number which does not work. The instructions which came with the boat say to undo the inlet and open a faucet for air an the unit should drain. It didn't.

Thoughts?
Atlantic Marine is long gone.. Just like any hot water heater drain off the lowest tapping, usually the cold water inlet, while cracking open the T&P valve. You may still have the check valve in the piping and that is likely the reason you can't blow it out... Don't forget to bypass the FW pipes (remove from tank and connect hot to cold) and suck AF into them...

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post #3 of 6 Old 12-17-2012
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Re: Atlantic Marine Hot Water Tank and Fresh Water Winterization

If it's old there's a good chance there is sediment in the tank. It would make draining difficult since it blocks the opening to the drain. the old Raritain HWH on my boat had allot of sediment in it.

Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club.
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post #4 of 6 Old 12-17-2012
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Re: Atlantic Marine Hot Water Tank and Fresh Water Winterization

This hot water tank can only be drained through the cold water inlet at the bottom of the tank. This inlet has a non-return valve in it. To drain remove the in and out lines. Stick a piece of thick wire into the cold water inlet. This will allow the water to flow out. Make sure the "out" (hot) line is removed to allow air into the tank.

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post #5 of 6 Old 12-17-2012
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Re: Atlantic Marine Hot Water Tank and Fresh Water Winterization

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This hot water tank can only be drained through the cold water inlet at the bottom of the tank. This inlet has a non-return valve in it. To drain remove the in and out lines. Stick a piece of thick wire into the cold water inlet. This will allow the water to flow out. Make sure the "out" (hot) line is removed to allow air into the tank.
The Atlantic Marine tanks just have female tappings into which brass nipples were threaded. The check valves were usually external to the tank or in the cold water feed line.. Any check valve should be clearly visible. I've net yet seen an AM tank with the check valve threaded directly into the cold feed but what installers do could make it possible....


Cold feed bottom right. Brass nipple. The check valve was in the cold feed line about 18" away from the tank with this installation.


With the SS jacket off the tank..



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If it's old there's a good chance there is sediment in the tank. It would make draining difficult since it blocks the opening to the drain. the old Raritain HWH on my boat had allot of sediment in it.
The Raritan tanks are cheap glass lined tanks with an anode. The anode usually rots way, then the porcelain cracks and the tank begins to rust. You don't have anodes or rusting issues on SS tanks like you do with a glass lined tank.. You would have to have a LOT of sediment in your water system to plug the cold water feed on an AM tank... I suspect the OP just never found or knew there was a check valve in the system....

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Last edited by Maine Sail; 12-17-2012 at 10:36 AM.
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post #6 of 6 Old 12-17-2012
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Re: Atlantic Marine Hot Water Tank and Fresh Water Winterization

that is one impressive looking HWH tank!

Denise, Bristol PA, Oday 30. On Tidal Delaware River, Anchor Yacht Club.
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