Product review (5 stars): Good Qualiy at an Excellent Price
Thread, Brass, 1/2-Inch (Tools & Home Improvement)
This valve is a direct replacement for the WATTS M1 valve that was placed in service in 1988. It filled my needs perfectly.
Fortunately, the brass adaptors that were originally soldered to the copper inlet piping didn't have to be removed. I removed the brass adaptors from the new valve, but used the new O-rings. The replacement took me less than 45 minutes.