Model No: CKLT
Check valves are installed into the bottom of Pop-Up riser stems to stop water from leaking and draining out of lower-elevation sprinklers – called low-head drainage, which occurs after the remote-controlled or manual sprinkler valve shuts off. Check valves are usually always necessary when there are grade elevation differences. Price per each in 25/ct bags is 62 cents. It is less costly but also less easier to buy the bag and install them yourself rather than have them factory-installed. Installation is easy but pop-up stem must be removed from housing in order to install check valve.