Product review (4 stars): How to replace this valve.
I have purchased two of these valves. My on/off lever broke in half and luckily it was in the on position until I was able to change it out. Mine was originally I a OATEY 38822 complete valve with the inset box along with the drain made by WATTS which was not noted on the boxing. These valves were made for a easy change out using just the top side of the valve when removing the two top screws and sliding the top side of the valve off. Mine had been on for 18 years and I used a quarter inch rachet with a 5/16'' socket along with a flat head screwdriver head into the socket. It broke free with no problem. As I said the top half slips directly off vertically. Used the two new screws with new orings and also the bottom two orings I did replace half of this unit. Simple procedure for just about any one with any mechanical ability. Don't forget to turn the water off at the meter box prior to change out and have someone watch for any leaks when going back out to the meter box to turn it back on. As it looks all these valve tops made by watts will work. The bottom bases are sometimes different for different install applications. All my pumbling was copper in the walls so by purchasing another watts valve which this one is just made for HOMWERKS with a different number. IT made life much easier than tearing out the sheetrock wall.