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TOPIC: Waste Water Tank Replacement

Waste Water Tank Replacement 09 Oct 2017 01:07 #1

  • mvolden
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I have a 2000 Bayliner 2855. Opening the engine hatch today found liquid was leaking from the holding tank. How difficult job is it to replace, doe's not look to bad, where can I find a replacement tank close to the same size, and anything else I should replace relating to the waste tank at this time.

All help is appeciated.
Thanks,

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Waste Water Tank Replacement 09 Oct 2017 14:24 #2

  • flyman219
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Hard to imagine a holding tank that new failing. If I were you I'd do some detective work to see the exact source of the liquid. You have a macerator pump with a seacock on the outflow side I would guess, did you energize the pump and not open the valve? Check your hoses and connections (the small vent hose too), did you overfill the tank before you pumped it out? Just a few things to consider before you pull the tank out. Hate to see you go through the process and find out the tank is OK. If you do pull the tank test it on the ground to make sure that is has a crack in it.

Mike

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Last Edit: by flyman219.

Waste Water Tank Replacement 10 Oct 2017 15:31 #3

  • builderdude
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+1
If you do end up replacing the tank consider replacing all the waste hose also.

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Dave
Edmonds, WA
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www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556

Waste Water Tank Replacement 10 Oct 2017 19:13 #4

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I agree that it's probably a fitting or hose. I can't remember hearing a tank go bad without something like freeze damage happening.

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Waste Water Tank Replacement 11 Oct 2017 01:50 #5

  • floatyerboat
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Before I replaced the hoses I saw a leak at the bottom opening of the tank. The threads on a poly tank are as soft as butter so don't over tighten and stretch them. I screwed the new adapter in by hand with 5200 for sealant.
If you can, put the new hose on the adapter before you put on the 5200. You may have to wrestle putting the hose on the adapter and it could possibly loosen the threads and leak again....please don't ask me how I know.

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Dan
Frostbite Falls, Minnesota
Claudia V. III
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Waste Water Tank Replacement 11 Oct 2017 04:53 #6

  • Mr. Darcy
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If you do need a new tank, check out Plastic-Mart.com They have hundreds of sizes to choose from. Prices seem reasonable to me. They will custom fab a tank. I have no idea on cost for the custom fab.

Greg

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Waste Water Tank Replacement 11 Oct 2017 22:58 #7

  • Madgreekx3
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I would re-tighten every hose clamp with a small ratchet and socket, not a screw driver, careful not to over tighten. Make sure to check your vent line and thru hull vent for clogging. Seems like some times one overfills the tank and sends solids up thru the vent clogging it. Once that happens and you go to pump out, it creates a huge vacuum in the tank and the tank will end up collapsing in on itself, stressing the corners of the tank and possibly creating your leak. I learned this one the hard way. It was a small crack, but a huge mess. Good luck!

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Waste Water Tank Replacement 13 Oct 2017 02:45 #8

  • riverguy42
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I agree, hard to imagine a holding tank leaking so badly that it needs to be replaced versus repair. However, if you do need to wind up replacing it, you might want to consider one of the new high-tech nitrile bladder tanks. You cut the old tank into pieces to get it out, then put in the bladder to replace the ols tank. Easy peasy!

Nauta Black-water Bladder Tank

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Waste Water Tank Replacement 13 Oct 2017 10:13 #9

  • floatyerboat
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if you get the tank out in one piece a can of gas and a match works good too. :sick:

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Dan
Frostbite Falls, Minnesota
Claudia V. III
1988 - 3218
Gas Drives
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Waste Water Tank Replacement 13 Oct 2017 14:20 #10

  • Ridgedown
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5200 does not grasp to poly. You need to find and expose the crack in hose fitting or tank or hose. If the crack is in the poly, you can get it re-welded or if it is a fitting, pull the tank out and get a new fitting re-spun on. if there is enough access, you can weld the crack in place, if it is a crack.

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Waste Water Tank Replacement 13 Oct 2017 16:21 #11

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5200 in general doesn't adhere well to plastics but it will provide an excellent sealing material between the waste hose and the barbed side of the fitting. It'll do the same as a thread sealant between the fitting and the waste tank. Because it doesn't "stick" well to these parts you'll actually be able to remove them later if needed. Just went through this when upgrading to the electric head.

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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
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