12775 RESERVOIR ST., CHINO CA 91710 TEL: 909-548-6611 FAX: 909-548-6622 www.kingstonbrass.com BEFORE INSTALLATION. (1) Do not turn on the water during installation of the Safety Check Valve Fitting. 1 (2) Do not use the Safety Check Valve Fitting if the product does not include a water restrictor and washer. 2 Loosen Turn off water shut-off valves completely and disconnect the supply line at the end that is attached to your faucet stem.