Valterra 6101 PVC Gate Valve, White, 1-1/2" Slip

This type of slide gate valve was originally designed for draining tanks and controlling shallow bodies of water like ponds.

They also can also be used as shut off valves in low pressure or vacuum air lines.

Please note that each valve size has an open and closed pressure rating.

Because the plastic paddle can flex with flowing water they are not good for throttling water or trying to close the valve when water is flowing – thus the low mid flow cut off water pressure of ~6psi.

These slide valves are sometimes referred to as “knife” gate valves and are a great alternative to ball valves in low pressure applications since they are full flow, quick opening, and are generally a much lower cost especially in larger sizes.