Drain & Trap Connectors are ideal for new installation, repairs and alterations. They can be installed quickly and easily without special tools, gluing, threading or soldering. Simply place the ends over the pipes and tighten the rustproof clamps. The DTC-150 size connects 1-1/4" or 1-1/2" tubular traps to all common 1-1/4" or 1-1/2" drain piping. The DTC-215 size connects 1-1/4" or 1-1/2" tubular traps to all common 2" drain piping, except copper. (For 2" copper, use DTC-150.).