The Expansion Control Valve (ECV) is designed to relieve the increase in pressure caused by the water expansion during the normal heating cycle. It is recommended that an ECV be fitted to the cold water supply line. This will relieve cold water, not hot water, during the heating cycle saving energy and increasing the life of the Pressure Temperature Relief valve (PTR).
Some local governments make it mandatory to install an ECV in the cold water line. PTR and ECV valves are safety valves and should be replaced every 4 years.
See table below for product codes and sizes
Description
| AVG1000 | COLD WATER EXPANSION VALVE 700 kpa 15mm |
| AVG1005 | COLD WATER EXPANSION VALVE 850 kpa 15mm |
| AVG1010 | COLD WATER EXPANSION VALVE 1200 kpa 15mm |
