Midline Valve 4I2T112 PVC Inline Check Valve for Backflow Prevention 1-1/2'' Solvent Connections White Plastic

I used this for a drain line (low pressure) so once I removed the spring with 1 screw it worked great! Seems high quality and working well!

Great construction and what a life saver and way less than discounted hardware stores. Used on water fall pump and recommend

It's spring loaded close. The spring tension is more than I need. But, good thing the spring is removable.

Inline check valve works great but I didn't realize you shouldn't use it on applications with solids in the line. Ended up clogging on my pond intake side but was great on the output side

Appears well made and works as expected

This is a good product in the correct application. I installed these to prevent priming problems on a swimming pool. They worked great for a week or two. Lawn mower clippings and small leaves made their way it into the main drain and skimmers. The check valve clogged and water flow came to a complete stop. If you must use a check valve in your system, 1) best if you only have "clear, clean Water". 2) If there is only occasional debris get a clear check valve so you can see the debris and make sure it is threaded for removal and cleaning. The valves were a real clogging problem in my "leafy" situation. I removed the valves, but it was not the fault of the valves. I used them in the wrong application.

These valves have been great. I've been using them in my fish pond, and they do clog with algae occasionally, but they can be disassembled easily with a monkey wrench and cleaned out without too much trouble. I like 'em and haven't got a bad to say about 'em.

the valve seems to be constructed well but it is very noisy. the valve that it replace was barely noticable but this thing sounds like a jackhammer when it opens