Presuming we are talking Low Density LDPE plastic (usually a semi-translucent white/yellowish material), I don't think those tanks have a useful life per se. I had cracked freshwater LDPE tank, and was able to weld it when it cracked. Welding plastic is pretty easy. As to one of the fittings allowing odor to get out, I would address that through a new fitting or re-setting the fitting with plumbing tape, etc. Personally, I would not replace it with a flexible tank. Just my $.02 worth...
Bruce Whitmore (847) 404-5092 (mobile) bwhitm...@sbcglobal.net
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