EasyDrain Ref. 540 Male-to-Male Adaptor 1-1/2" Male to Male Adaptor Threads 1-1/2" x 1-1/2" Can join two extensive pipes together increasing its length Easily connects to the EasyDrain Ref. 510 Expandable & Flexible 1-1/2" P-trap Easily connects to the EasyDrain Ref. 545 Dishwasher Drain Connector 1-1/2"