Temperature and Pressure relief valves (T & P) are designed to discharge excess pressure which builds up inside sealed systems during the heating cycle. If the water inside the cylinder reaches above 90¬°C the T & P valve will discharge the hot water protecting the cylinder and components from excessive temperatures. During normal operating conditions nothing will be discharged from the valve. Features _” x ¬ø15 setting 7 bar with short temperature probe. Prevents damage to heating systems by relieving excess temperature and pressure Factory pre-set temperature discharge at 90¬°C ê non adjustable Range of factory set discharge pressures available Available with long or short probes and 1ö2ì or 3ö4ì connections DZR brass body Show More Show Less