Compare

Check Valve 3/4 Inch Clear with slip unions - A safety device every aquarium owner should have to prevent flooding.

True Union Swing Check Valve - 1 inch Slip x 1 inch Slip - An inexpensive safety device every aquarist should have!

True Union Swing Check Valve, 1-1/2 inch Slip x 1-1/2 inch Slip - A SAFETY DEVICE EVERY AQUARIST SHOULD HAVE!

CPR Aquatics Sump Sock Filter with Inlet Assembly - The CPR Aquatics Sump Sock Filter with Inlet Assembly hooks onto the side of a sump and filters out the largest particulates and sediment coming out of the aquarium water into the filter sock.