barry bourgault
New Member
As is the usual case access is very limited. I have a lateral waste arm coming off a black cast iron vent, house is 50+ yrs young. The waste arm is leaking at the connection. My question is best way to remove this arm, it is threaded into the vert. stack. Access is very limited and if it is broken at the hub it would a major, major job to repair. The waste arm in question is copper, my thought is to heat the joint with MAPP gas torch and contraction would make removal easier. Also thought about spraying joint with PB Blaster or another product. am having to reach through 12" cabinet to reach this.