COUPLE QEST 3/4&3/4CTS by QEST MfrPartNo QAC44R For hot and cold water Use with polybutylene, CPVC and copper tubing Resists freeze damage Rated 100 PSI to 180 F (200 PSI to 73 F) 3/4" CTS (7/8" OD) x 3/4" CTS (7/8" OD)