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Old 11-28-2015, 04:15 PM   #1
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1977 Layton holding tank question

Hi, I am the proud new owner of a 1977 21' Layton travel trailer. I have gutted the interior and am just about done replacing the floor, but before finishing that up, I am wondering about the grey and black holding tanks. My question is whether I should replace them simply because of age even though they look fine from the outside. They do not leak and appear in good shape. They are both sort of a speckled gray and my guess it that they are some sort of molded poly, no apparent seams. I am planning on replacing the valves and external plumbing, but would love to avoid pulling the tanks. Any thoughts?

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Old 11-29-2015, 11:41 PM   #2
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Welcome to IRV2 and as far as the tanks, if there are no stress cracks near the mounting rails, and no other obvious damage I say save the money for more important stuff, like upgrading the tank sensors to some thing like seelevel or at least horst tank probes. but just my opinion.

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Old 12-01-2015, 08:51 AM   #3
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I would leave them alone if they are not leaking and seem to be ok.
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