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Old 12-29-2016, 11:13 AM   #1
K&Gs3400RL
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Black Tank repair or replace?

Has anyone ever repaired a black tank instead of replacing it? Is that possible?
 
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Old 12-29-2016, 11:39 AM   #2
bw2
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I have repaired two black tanks. I used fiber glass mesh and marine epoxy. Both instances the repair was good. I had replaced the original tank after the fix. The replacement tank cracked near the outleck neck one year after replacemnt. This repair has now held for three years.
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Old 12-29-2016, 11:46 AM   #3
K&Gs3400RL
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How long did you have to let it dry? I assume it cracked but haven't been under yet to check it out. Do they useally crack on the bottom or top?
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Old 12-29-2016, 03:10 PM   #4
1retired06
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Have also repaired, using two coats of fiberglass patching covered by eternabond tank tape. There is a plastic weld tank repair product several on this forum have recommended.
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Old 12-29-2016, 04:31 PM   #5
rohrmann
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I repaired our grey tank, which is exactly the same as the black tank. They are both ABS, and ours cracked in the molded v-groove on the bottom. I ordered Plasti-Mend directly from the company, and it worked great. I then added angle iron supports across the frame, in addition to the two braces already in place, but did nothing to support the tanks. I then added spacer blocks of varying thicknesses to the tanks which are supported by the braces. I have heard some just add a sheet of plywood under the entire tank. My post with photos is on page 6 at this link: http://www.montanaowners.com/forums/...ms=tank,repair
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Old 12-30-2016, 03:44 AM   #6
K&Gs3400RL
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If I should have to pull the tank, how are the vent and toilet pipe attached on the top? Do I need to cut them in the basement?
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