91 four winns 285 winterizing question

estame6

Seaman
Joined
Sep 21, 2006
Messages
68
Can anyone suggest how to winterize a hot water tank that doesn't have a drain ****. This is a new boat to me, it has an Attwood EHM6-SM which is a fairly standard hot water tank and am not quite sure how to winterize it. I intended to run red pop thru it but normally like to empty it first or will take too much AF. Any suggestion would be appreciated.
 

alldodge

Supreme Mariner
Joined
Mar 8, 2009
Messages
34,300
Just looked the manual up and it shows a drain (item 7) in the manual. Its its not there look for a plug. I winterize my HW tank by draining and then connect a short piece of hose between the inlet and out put of tank. This way you need much less AF

That said, I also don't use AF in my water system. I connect a compressor air line to the inlet boat fitting, set between 25 and 40 psi and blow all the water out when I'm changing oil

https://www.wanderlodgeownersgroup.com/downloads/Atwood Electric Water Heater.pdf
 

estame6

Seaman
Joined
Sep 21, 2006
Messages
68
Thanks, will look for a plug there certainly isn't a fitting there like I'm use too and can't see not having a drain either.
I'm nervous about the compressed air not knowing how it by-passes the water pump in the out-drive.
 

alldodge

Supreme Mariner
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Mar 8, 2009
Messages
34,300
The water system from the drive is not connected to the HW heater.

There can be a connection between the engine block and the HW heater to warm the water, but I'm talking about the fresh water which comes from the holding tank or shore connection

Post a pic so we can see
 

estame6

Seaman
Joined
Sep 21, 2006
Messages
68
The compressed air, does that take care of the hot water tank?
Taking that picture and it's such close quarters and cell phone didn't do a good job, will try something different.
 

estame6

Seaman
Joined
Sep 21, 2006
Messages
68
Thanks, the tank is so hard to see and finally with use or mirrors and a spot light finally found a small brass drain plug and of course I cant reach it. Will ask my friend to loan me his 6 year old to climb down there. (tongue in cheek) cant believe installing a hot water heater in this position.
After draining the tank do you suggest blowing out the water with compressed air from the transom tap fitting and then from the faucets which should take care of the lines?
 

alldodge

Supreme Mariner
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Mar 8, 2009
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34,300
Could blow everything out first. I run the water pump until it will not shut off. Then disconnect the hose coming from the 12V pump and blow from there. After no more water comes out (only air), then finish draining the tank.

You could probably blow when the hose fitting, I just never have
 

alldodge

Supreme Mariner
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Mar 8, 2009
Messages
34,300
Suggest after getting the plug out, put a barbed fitting back in and run a piece of hose out where you can get at it next time
 
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