Tying in new no-hub to an old 4" pipe, is there an adapter made that addresses the reduced diameter of the old iron pipe? I've got a 4-band no-hub adapter making the connection, and it's tight, but it's visibly deformed due to the slightly smaller diameter.
I'm not overly concerned since it's vent only / no waste, and vertical, but I'm wondering if there's anything else I can or should do, like maybe a couple wraps of PVC tape on the pipe to increase the diameter at the point of connection?
I'm not overly concerned since it's vent only / no waste, and vertical, but I'm wondering if there's anything else I can or should do, like maybe a couple wraps of PVC tape on the pipe to increase the diameter at the point of connection?