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Open Roads Forum  >  Fifth-Wheels

 > FRESH WATER TANK LEAK

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ksg5000

Oregon

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Posted: 10/31/20 04:11pm Link  |  Quote  |  Print  |  Notify Moderator

No expert but FW isn't under pressure and something like Eternabond might suffice. Won't cost much to test.


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Lantley

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Posted: 10/31/20 05:31pm Link  |  Quote  |  Print  |  Notify Moderator

94-D2 wrote:

Lantley wrote:

I sort of had the same issue. Basically a poor installation. I replaced the tank myself with a brand new tank. I did not trust that a repair would be permanent or foolproof vs. replacement.


I found the model but a new one does not come with the inlet, drain, over flows and monitors in.

Did your replacement come prepared or did you have to have them custom installed.

Interestingly enough, I ordered mine through an RV shop. vs. directly from tank manufacturer. As a result all those items were in place. I imagine the shop knew to have tank prepped before it was shipped vs. just ordering a blank tank.
Kudos to the shop because I would not have thought about ordering the tank prepped. For the most part I think I could of transferred old connections to new tank. However it was nice that it was already done for me . Especially tank sensors.
Although the shop ordered the tank. The tank was shipped directly to me ready to go. Cost through shop was comparable to ordering directly.


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94-D2

Sutter Creek ca

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Posted: 10/31/20 06:15pm Link  |  Quote  |  Print  |  Notify Moderator

I borrowed a proper air welder today. It came with three different types of rods, abs, pvc and PP rods. None of those would stick. I deduced that this tank was PE plastic and I enlisted a few tops from cheap water bottles. Worked like a charm. Tank is full on a set or saw horses, no leaks from the weld in over three hours. I’m going to over coat with UV activated composite weld and call it good. If it happens again, I will try a direct replacement from the manufacturer if that is possible.


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Posted: 10/31/20 06:28pm Link  |  Quote  |  Print  |  Notify Moderator

Good job! Those fresh water poly tanks are usually LDPE (low density polyethelene) and plastic milk jugs (or water bottle caps) will often work if you don't have LDPE welding rod.


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94-D2

Sutter Creek ca

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Posted: 10/31/20 07:20pm Link  |  Quote  |  Print  |  Notify Moderator

blueglide wrote:

Good job! Those fresh water poly tanks are usually LDPE (low density polyethelene) and plastic milk jugs (or water bottle caps) will often work if you don't have LDPE welding rod.


Apparently so. Been holding a full tank for several hours now. I’m going to coat in a uv activated plastic weld and re-install the tank with some additional belly support. I will clean up the wiring and hydraulic lines and close backup with the coroplast covering. I also have a mod planned for the rear bumper and going to add a set of casters that will require modifications to the brackets of the rear end with a 92” custom diamond plate storage box.

I’ll post up some pics as it gets done.

alboy

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Posted: 11/01/20 06:29am Link  |  Quote  |  Print  |  Notify Moderator

Replace your insulation with Rock WOOL AS ITS WATER IMPERVIOUS.Had the ice maker line let go on our 2014 Landmark,the wiring etc was very neat.Also check the heat ducting for crimping.cheers

94-D2

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Posted: 11/01/20 09:12am Link  |  Quote  |  Print  |  Notify Moderator

Only insulation in there (if it is even that) is a metalisized bubble wrap laying on top of the coroplast. Nothing else.

alboy

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Posted: 11/02/20 08:05am Link  |  Quote  |  Print  |  Notify Moderator

Interesting,ours has the bubble wrap as well but was well insulated.I replaced with r22,we are wintering in it and it stays very nice,it has the winter pkg .

94-D2

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Posted: 11/02/20 09:22am Link  |  Quote  |  Print  |  Notify Moderator

I would have thought it would come with insulation. But I guess I’m beginning to understand why it was such a great deal.

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