Product information: MMRS Fill Drain Port Base - BlackMMRS-FDP-BASE
Molded from heavy duty nylon with a black satin finish, this END CAP allows you to add an external fill or drain port to your build which greatly simplifies filling and draining water from your loop. Topping off and bleeding air are also much much easier. Includes a reservoir tube O ring seal. This part is designed to work in conjunction with the Fill and Drain Port Cap-part numbers MMRS-FDP-RC-XX (round) or MMRS-FDP-SC-XX (square) or the Fill and Drain Port Spacer Caps-part numbers MMRS-FDP-RCS-XX or MMRS-FDP-SCS-XX. The XX is a place holder for the 2 letter color code-RD for red as an example.