17' Boler blackwater tank removal

[Doug in Ontario]

We are trying to permanently remove the blackwater holding tank from a 17 foot 1979 Boler.
Got toilet out but upper flange is silicon sealed to tank input hole and outlet collar is glued to tank.
Short of taking my Sawsall to it, how do you get it out?

[TimR]

Mine was siliconed in and I was able to used two screw drivers in opposite holes and generate enough torque to spin it out. It was a chore for sure. But if you are removing the tank anyways and don't care if you damage it, they sawsall sounds like a quicker option. T

[Doug in Ontario]

Originally Posted by TimR

Mine was siliconed in and I was able to used two screw drivers in opposite holes and generate enough torque to spin it out. It was a chore for sure. But if you are removing the tank anyways and don't care if you damage it, they sawsall sounds like a quicker option. T

Got it out! Man, that was a tough job.
Good old Sawzall came through for us.
Cut off the blackwater exit pipe flush with floor under trailer. Drilled dozens of holes circling the input hole till it caved in. Used hole saw to cut holes in top of tank. Sawzall to remove most of upper side. Shoved logs under tank to raise off floor so Sawzall could cut tank in half. Took out front half of tank. Finally discovered I needed to sever the blackwater vent pipe with a long Sawzall blade, to permit removal of rear half. Sounds like a Sawzall testimonial eh?
Still aching after a nice hot shower ��