The pressure and temperature relief valve (AQ1) can be fitted to all Zip unvented water heaters. This valve can be used with any installation by fitting securely into the locating point provided on the water heater. The AQ1 is basically a safety valve that will relieve any excess pressure above 7bar or excess temperatures above 90 C. Suitable for: 5, 10, 15, 30, 50, 80 a 100ltr Zip unvented water heaters Max temperature setting 90°C Max pressure setting 7Bar, Manufacturer: Zip Water Heater