Flexible plastic pipes for drainage purposes and plastic tubing for drainage purposes, and non-metal couplings therefor and fittings therefor, namely, Ys, Ts, elbows, bends, and reducers

Rigid plastic pipes for drainage purposes and plastic conduit for drainage purposes, and non-metal couplings therefor and fittings therefor, namely, Ys, Ts, elbows, bends, and reducers