Seaward water Heaters - SailNet Community
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post #1 of 9 Old 01-09-2013 Thread Starter
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Seaward water Heaters

Hello to everyone,

I have just joined and it is a pleasure to have found you. I belong to lots of different forums for lots of different reasons and i simply love the help that we all give each other.
Anyway, I have a 20 gallon Seaward water heater aboard my Silverton 453 and a couple of years ago it started leaking so i replaced it, if it were only in my engine room the way that the water heater was aboard my Trojan 400 i would have left the stupid drip alone.
So, I removed the old heater that was in the ceiling space above the mid stateroom head and of course i couldn't get it completely empty so about 2 gallons of the crappiest sludge went all over me and of course the head, shower, sink etc, thank god i have a wife that cleans for me...
Having installed the new heater which was very simple and a whole lot lighter i was elated until the past couple of months when i started noticing an earthy smell when i first turn on the hot water and even though i put an addadtive in the 200 gallon fresh water tank every now and then i just know that the sludge that was in my old heater is building up in this one and I was wondering if anyone knows how i can clean the whole system out keeping in mind that when you drain one of these things they always leave a few inches in the bottom of the tank because of the stupid placement of the flush valve.
Any help or suggestions will be greatfully appreciated and once again I am glad to have found you all.

regards,
Doug.
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post #2 of 9 Old 01-09-2013
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Re: Seaward water Heaters

When you clean it and its almost empty use an air pump/ pressure on the intake...it will blow all the crap out of or a lot of it anyway. Put exit hose into a bucket so it doesnt get all over


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post #3 of 9 Old 01-09-2013 Thread Starter
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Re: Seaward water Heaters

Chef2sail,

that is a great idea and i wondered would it also work to install a hose on the intake and a length on the exit (into the ocean) and flush it through with pressure?

regards,
Doug.
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post #4 of 9 Old 01-09-2013
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Quote:
Originally Posted by doorpro View Post
Chef2sail,

that is a great idea and i wondered would it also work to install a hose on the intake and a length on the exit (into the ocean) and flush it through with pressure?

regards,
Doug.
This seems to me the best thing, as air may push out some sludge the water will dilute it and rinse it. You should do this to your home heater as well.

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post #5 of 9 Old 01-09-2013
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Re: Seaward water Heaters

I use the Scaprego air pump we use to fill our dinghy. Runs a high pressure throug. We see crap in the bucket too when we do it.


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post #6 of 9 Old 01-10-2013
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Re: Seaward water Heaters

Fill the water heater with hot/warm vinegar, at least to the level of the exchange pipes or elements, wait a few hours, then flush with hot/warm water. Use the pumping methods mentioned above.

Water may taste funny for a bit, and scale may occasionally emerge, but that's all good.
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post #7 of 9 Old 01-11-2013
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Re: Seaward water Heaters

You may also want to get into the HABIT of running the hot water tap even when you don't have hot water. This keeps the water moving through the heater. also, don't keep the heater plugged in and ON for any longer than you need to make hot water. Overheating the water tends to drop precipitates out (depending on the condition of your local water).
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post #8 of 9 Old 01-11-2013 Thread Starter
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Re: Seaward water Heaters

All great ideas and i also talked with a friend that has a filter on his water hose which helps.
I did call the manufacturers of the heater and they recommend the hose idea as the air compressor is messy and not a controlled flow like water pressure.
What really amazes me is that these water heater manufacturers dont build these units with a drain down at the bottom of the tank because when i drained the last one i couldnt get the last gallon or so out until i tilted the tank. I'll plug that hole next time...
So i am going to try everything here and then add a filter to my filler hose. I
ll let you all know what transpires when i get to it...
Thanks to you all for the great suggestions..
regards,
Doug.
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post #9 of 9 Old 01-11-2013
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Re: Seaward water Heaters

Fair winds, and golden strands.
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