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-   -   How heavy is a concrete laundry tub? (https://www.diychatroom.com/f7/how-heavy-concrete-laundry-tub-212098/)

 Homerepairguy 12-03-2014 04:32 AM

How heavy is a concrete laundry tub?

We have an old single compartment concrete laundry tub that looks kind of like this one (including the stand):

http://www.historichouseparts.com/pd...S100312-03.jpg

Although all of the water pipes on our property are copper, the hot and cold water pipes to this laundry tub are galvanized. I think what happened is when my Dad built our laundry room addition 30 years ago, he used galvanized pipes since that's what he had on hand.

Anyway, the cold water galvanized pipe right behind the faucet developed a leak due to corrosion. I need to move the laundry tub to open up the double wall to replace the galvanized pipes with copper pipes.

Any retired plumber out there that knows about how much a single compartment concrete laundry tub weighs?

Thanks,
HRG

 oh'mike 12-03-2014 04:37 AM

About 70 pounds is a guess---Not to bad moving a single bowl sink like that--

 Ghostmaker 12-03-2014 01:19 PM

Still much more fun to break it up with a sludge hammer...

 Tom738 12-03-2014 01:39 PM

More than 70, less than 200. I moved one that felt ~150 the other day, but it was a double. So probably under 100, anyway.

 SPS-1 12-03-2014 06:57 PM

Measure it. Google Concrete weight calculator.

If its 32" x 30" x 24" tall on the outside, with 2" thick walls, its 7000 cubic inches and weighs 575 pounds.

 SeniorSitizen 12-03-2014 07:38 PM

With a length of 2x4 lumber and bath scales you can weigh it.

 kwikfishron 12-03-2014 07:52 PM

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Quote:
 Originally Posted by SPS-1 (Post 1458394) Measure it. Google Concrete weight calculator. If its 32" x 30" x 24" tall on the outside, with 2" thick walls, its 7000 cubic inches and weighs 575 pounds.
I didn't do any math but there's no way that the sink pictured weighs even close to 575 lbs.

 SPS-1 12-03-2014 08:06 PM

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Its easy to figure out the weight if its measured and you do the math. Without that, we are all taking WAGs. But figure if its made from 5 of these Lowes patio stones (4 sides plus bottom), its 400 pounds

 TheEplumber 12-03-2014 08:28 PM

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Some of those old sinks are actually soap stone.
Google says around 20 lb/sq ft.

My concern is the flimsy legs. Don't let them fold up on you!!

 Doc Sheldon 12-03-2014 08:29 PM

Not too many bath scales will go that high, I'm betting. Probably closer to 300# than 200... had one similar to that, was 1.5 inch thick... I moved it, but I couldn't get it up into the pickup without help.

 SPS-1 12-03-2014 08:43 PM

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Quote:
 Originally Posted by TheEplumber (Post 1458802) Google says around 20 lb/sq ft.

Something wrong in what you googled. Weight should be per cubic foot, not per square foot. Soapstone seems to be heavier than concrete.

The one in my parent's old house is a double with walls about 3" thick. It aint going anywhere.

 Doc Sheldon 12-03-2014 08:53 PM

Dang! That's a lot of kin per cubic shaku!

 SeniorSitizen 12-03-2014 10:53 PM

Quote:
 Originally Posted by Doc Sheldon (Post 1458810) Not too many bath scales will go that high, I'm betting. Probably closer to 300# than 200... had one similar to that, was 1.5 inch thick... I moved it, but I couldn't get it up into the pickup without help.
We'll only be weighing half of it + half the stand weight X 2

 Homerepairguy 12-04-2014 01:16 AM

oh'mike, Ghostmaker, Tom738, SPS-1, SeniorSitizen, kwikfishron, TheEplumber and DocSheldon (hope I didn't miss anyone),

SPS-1 came up with a good idea about using an online concrete calculator that I didn't think of doing.
Measuring the 4 walls and assuming that the bottom is also 1.2 inches thick like the walls, using an online concrete calculator I came up with 134.8 lbs.

Oh and thank you TheEplumber for the warning about the legs folding up on me. The legs are old and a little rusty so I can see that happening. I would have overlooked it without your warning.

Thanks again,
HRG

 Homerepairguy 12-04-2014 01:42 AM

I've come up with an idea for moving the laundry tub that I'd like to run by you guys.

The tub's drain goes into a trap and then the pipe runs horizontally into the double wall. It's made out of black ABS.

I'm thinking about removing the drain completely from the tub and then using an automotive floor jack and a piece of 2x6 lumber under the tub. Raise the tub to remove weight off the legs and then cut the leg assembly so I can remove the legs. (As TheEplumber pointed out, the legs are flimsy anyway so no loss cutting to remove them.)

I might have to use additional lumber on top of the jack to attain the height needed if the jack cannot go up high enough. Then lower the tub all the way down and use the automotive floor jack to move it since the jack has wheels.

When reinstalling the tub, jack it back up and install a new leg assembly made out of an old bed frame. I think I can assemble the bed frame leg assembly by bolting it together. I'll use stainless steel bolts. Then lower the tub on the new bed frame legs.

If you see any kinks in my plan please let me know,
HRG

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