valve for DST single handle kitchen and lavatory faucet includes a integrated handle limit stop which can be adjusted to help protect you and your family from scalding because it can limits the amount of hot water in the mix. The red tab on the back top of the is used to set built-in temperature stop easily. RP50587 VALVE - RP50587 single handle valve can be used with single handle Seal Technology faucets. Compatible with most DST single handle kitchen and lavatory faucet. lavatory kitchen faucet repair kit is made with high quality material, sturdy and not easy to deform. Easy to use and restores original faucet performance, preventing leaks and drips. Allows you to repair your faucet with half of the cost. If your faucet is dripping or leaking even when it's supposed to be fully shut off, it's time for your to replace a new valve. RP50587 kit comes with Hex wrench for simple installation. HOW TO INSTALL? 1. Install the new and the bonnet nut, use the wrench to tighten the bonnet nut; 2. Test leakage and set temperature limit(optional); 3. install the rest parts and finish!, Manufacturer: Ounfhtrttk