>B< Press fittings for water applications are identified with a black O-ring. For natural gas and LPG applications, fittings are identified by a yellow coloured O-ring and a yellow mark on the fitting body.
*Important Note: The O-ring colour and identification must meet the application. O-ring in the fittings are not to be removed or changed.
The unique pressing indicator is a specially designed O-ring. It has a reduced section in two positions that allows water or air past the sealing element of any unpressed connection, thereby providing a visible leakage point during the commissioning of the system.
Unpressed fittings are identified by pressurizing the system with a pressure range of 100 kPa to 500 kPa for water (prior to the final pressure testing) and 2.2 kPa to 300 kPa for gas.
When the fitting is pressed, the O-ring material compresses, filling the gaps, creating a leak free joint.
Final testing of the system should be conducted in accordance with AS/NZS 3500 and/or AS/NZS 5601.