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Old 06-22-2023, 03:57 PM
 
2,458 posts, read 2,476,156 times
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I have a 3" Milwaukee bi-metal hole saw. Will it put a hole into an old electric water heater? I have both electric and battery drills, but am wondering about the safety of the electric drill due to possibly encountering moisture.
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Old 06-22-2023, 04:38 PM
 
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If there's no water in the tank, don't see a problem. Either way, if you can lay the tank on it's side and drill down on it, no problem.
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Old 06-22-2023, 04:41 PM
 
Location: Johns Creek, GA
17,474 posts, read 66,027,504 times
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The “real question” is…


Why???
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Old 06-22-2023, 05:40 PM
 
2,458 posts, read 2,476,156 times
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Quote:
Originally Posted by K'ledgeBldr View Post
The “real question” is…


Why???

It's on a platform in a closet and I need to reduce the weight so I can get lift it down. The tank is over 30 years old and full of sludge.
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Old 06-22-2023, 06:22 PM
 
2,024 posts, read 983,695 times
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Quote:
Originally Posted by bagster View Post
It's on a platform in a closet and I need to reduce the weight so I can get lift it down. The tank is over 30 years old and full of sludge.
I assume it's out of service?
Can you use the flushing procedure to clean out the sludge?
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Old 06-22-2023, 07:19 PM
 
23,591 posts, read 70,383,686 times
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Hmmm... in a closet, weight is an issue in removal, there is sludge and it is not being used.

Logic:

Task:
Remove sludge and water to make it lighter, or have something that can lift it easily.

Solutions:

Pulley hoist, also called sn"i"tch block and a rafter. (Substitute an a for the i)


Or:

Attach tubing from the cold water input to a wet vac or better, to a hose outside. Attach another hose to the hot water output pipe to ADD water to remove the sludge the and then disconnect it and continue with the other, so the output eventually goes from sucking sludge, to sucking water, to sucking air from the dip tube.

Making a large hole in the side will only result in massive amounts of crud coming out suddenly - crud that is hard to control and stains. I would sooner drill a 1/2" hole in it and use a wet vac. Any remaining sludge is unlikely to have more weight (with tank included) than the empty tank when it was new.
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Old 06-22-2023, 10:14 PM
 
Location: Johns Creek, GA
17,474 posts, read 66,027,504 times
Reputation: 23621
…or you could just open the hose bib/sillcock and drain it!!!
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Old 06-23-2023, 03:53 AM
 
4,840 posts, read 3,267,271 times
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Or let a plumber do it.

Older I get, the quicker I decide to throw a couple Benjamins at a problem.
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Old 06-23-2023, 07:15 AM
 
Location: Sunnybrook Farm
4,520 posts, read 2,664,836 times
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Get two strong men to take it off the shelf.

I've tried all kinds of klugey stuff over the years; now I ring my next door neighbor's doorbell; he's about 40 and works out; the two of us can lift most anything I need.
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Old 06-23-2023, 11:03 AM
 
23,591 posts, read 70,383,686 times
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Quote:
Originally Posted by K'ledgeBldr View Post
…or you could just open the hose bib/sillcock and drain it!!!
That would be the easy way, but I'd bet even money that it is frozen shut if the unit is in that bad a state.
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