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Old 11-07-2017, 11:11 AM   #1
Fishingrodburner
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Closet flange removal black water tank leak

I need to drop my black water tank to repair a leak near the top. I removed the toilet and the screws securing the flange to the floor, but I can't get the flange to budge. I tried using a hammer and chisel with no luck. From what I can see, there is very little pipe between the floor and the tank. It's basically fitting to fitting. I can't raise the tank enough to use a saw under the flange. The flange is a spigot to hub type (3633). Any advice on removing the flange or tank for that matter is greatly appreciated. 2014 Sprinter Copper Canyon 324fwbhs


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Old 11-08-2017, 03:33 AM   #2
WaltBennett
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It's probably glued to the PVC going to the tank and maybe even to the floor. You'll probably have to grind/cut off the top, maybe just around the edge, to release the pipe and tank. Use something like a Dremel or other rotary tool, or you could get aggressive and use an angle grinder. Just don't grind into the floor itself.

Hooking it all back up with a new flange & union may be a little trial and error to get everything to fit, but it should work out fine.
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Old 11-08-2017, 06:23 AM   #3
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Does the drain pipe pass through the basement? I would cut the drain there in a piece long enough to place a coupling when putting back together.
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Old 11-09-2017, 06:17 AM   #4
Fishingrodburner
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Quote:
Originally Posted by WaltBennett View Post
It's probably glued to the PVC going to the tank and maybe even to the floor. You'll probably have to grind/cut off the top, maybe just around the edge, to release the pipe and tank. Use something like a Dremel or other rotary tool, or you could get aggressive and use an angle grinder. Just don't grind into the floor itself.

Hooking it all back up with a new flange & union may be a little trial and error to get everything to fit, but it should work out fine.


Thanks for the idea. I cut it with a small grinder and thin zip disc then removed it in pieces. Took about 5 mins.


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Old 11-09-2017, 06:18 AM   #5
Fishingrodburner
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Originally Posted by rhagfo View Post
Does the drain pipe pass through the basement? I would cut the drain there in a piece long enough to place a coupling when putting back together.


I can't get to the pipe. I cut the flange with a grinder.


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