With few moving parts to wear out, these valves withstand frequent opening and closing, pulsating flow, and rapid flow reversal.

Visually inspect flow and debris accumulation through the transparent valve body.

Also known as backwater valves, these valves prevent backflow of sewage and wastewater in drain, waste, and vent systems.

Insert unthreaded pipe into the socket ends and weld to create a permanent, leak-tight connection.