I have to connect some PVC to existing cast under my slab. Would I be better off cutting the cast and joining them with a boot or should I slip a gasket into hubbed fitting on cast and insert my PVC through that? I'm not sure which method would be less likely to leak under the slab. Thanks!
Get a rubber boot that fits the PVC and the Cast. Make sure the cast is cut clean and straight. Insert the cast halfway in and the pvc halfway in so the 2 ends are together. Tighten the clamps as tight as possible without stripping them.