Zoeller30-0041 50 psi PVC 2-Port Check Valve, 1-1/2" White

Built well, VERY quiet compared to traditional flapper check valve, I like the threaded couplers because it is faster to disassemble then hose clamps. Time will tell if it is good quality and stays clear, but I like it so far.

Exactly what we needed for the pool. Works great running vertical or horizontal. It's great that its see thru and you can see it in action. Would buy again! Thanks

I never knew a check valve could be this silent. I bought and installed this for my father in-law to give him visible proof the sump pump was ejecting the water because the sump lid is sealed, and this valve is transparent. I had no idea it was also so silent they cannot hear the sump running from upstairs. I recommend it for anyone that's tired of hearing the clunking of their sump check valve during the rainy season.

This check valve with union slip port fittings saves work. It is very quite. Nice to see the flow through the clear valve body. I have used the opaque is the past and this clear valve is of the same quality and functionality.

Used this to swap out an old check valve that went bad and got loud. What a difference. Delivery was quick and valve did exactly what it needed to.

I'm using this on an unground pool system. The clear housing provides visual operation, and "union fittings" are also a help for easy winterizing drainage. Yes, I would buy it again.

Had to replace both sump pumps and put them on, both of them does what it is supposed to.

Have you ever had to replace a sump pump more than once every five or six years? Then switch to a Zoeller unit. They are the best pumps for that purpose, and this transparent check valve is of equally stellar quality. Because most sump pumps are used in basement environments, the transparent body is perfect for seeing if your valve is jammed or working as intended. Also handy to check the water clarity. Great value.