Caleffi combination valve compatible with many unvented hot water cylinders. Product code: 533002CST
This valve is a combined monobloc unit with 22mm brass compression inlet, outlet and balanced cold feed and a 15mm brass compression pressure relief outlet.
The inlet is set to maintain a maximum pressure of 3 bar and the pressure relief valve is set to 6 bar @95°C with a maximum working pressure of 12 bar, secured with a brass compression nut to reduce the risk of leaks.
Other features include a 3/4" BSP female expansion vessel connection, a replaceable line filter and a flexible orientation for ease of installation.
This cold water group set may be one of the cheapest unvented cylinder valves available but the quality is assured.