Application Pressure reducing valves are installed in residential water systems to reduce and stabilise inlet pressures from mains water supplies or boosted water systems which generally are too high and variable for domestic appliances to function correctly. The 533 series is specially designed for hot and cold services in houses or apartments to equalise either the hot or cold supplies or both and prevent excessive pressure at water outlets such as taps and showers. Design The series 533 pressure reducing valves have a specially shaped diaphragm to give accurate pressure regulation in response to changes in downstream pressure. The larger outlet chamber creates a low exit velocity which is effective in reducing water noise. The control stem housing of the cartridge is made from a plastic material with a low co-efficient of adhesion which reduces the probability of scale deposits forming the main cause of pressure reducing valve malfunction. The cartridge and strainer screen are easily removed for periodic cleaning and maintenance.

Installation The valves are very simple to install with just two joints to make. The flow through the valves must follow the direction arrow on the valve body. Sufficient clearance must be allowed for the removal of the cartridge and strainer screen for cleaning and maintenance.