Heatlink 60020 3/4" Pressure Bypass

This valve prevents a steep rise of the pump head and maintains flow at a stable rate. Also ensures only required amount of circulating water is used for hydronic systems. The 3/4" valve can be adjusted to any point between 1.5 and 17 ft H2O (50 and 500 mbar). Maximum flow of 13 USgpm (2950 L/h).