No.
Although it may be water tight, it just wont stand up to the weight, and eventually it will just split down the side, and blow apart.
Go ahead, ask me how I know this... go ahead.
Ok you probably wont ask me, but just trust me on this one, it will not last when full of water.
I was trying to use one of these just as water storage, from my RO system, and after about a week, the whole side of it blew out, and i had a very wet floor.
you would be better off with a Phenolic resin tub.
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