Watts Water Technologies 263AP Pressure Regulator

The Watts 263AP is a 1/2" NPT female, three-way pressure reducing regulator designed to maintain a controlled downstream pressure in water and No. 2 fuel oil piping systems, with an adjustable range of 20–175 PSI and a maximum working pressure of 300 PSI. It features a lead-free brass body, a Buna-N disc, a reinforced Buna-N diaphragm, and stainless steel stem and spring, plus an aluminum spring cage and a 1/4" low-pressure gauge port, with a tee-handle for easy field adjustment and a female NPT threaded connection. The oversized-orifice, three-way design helps stabilize downstream pressure and protect sensitive components from inlet fluctuations, making it suitable for beverage dispensing equipment, ice machines, humidifiers, drinking fountains, laboratory process equipment, paint spray booths, and other industrial process machinery requiring accurate low-flow regulation. Factory setting is 75 PSI; service media include water and No. 2 fuel oil, with operating temperatures from 0°F to 140°F; common replacements include Watts LF263AP, LF26A, and SS263AP.