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Pressure Relief Safety Valves

Pressure relief safety valves.

Pressure is measured in "bar". One bar is about equal to the atmospheric pressure on Earth at sea level. In "old money" it's equal to 14.5 pounds per square inch (PSI).

The outlet from a pressure relief valve should be positioned in a way so as to not scald people or animals with escaping hot water or steam.

22mm Differential Bypass Valve
22mm differential bypass valve.
Fitted near the boiler, an automatic bypass valve is used to maintain a minimum flow rate through the boiler and to limit circulation pressure when other valves / water paths are closed.
£11.82
22mm Differential Bypass Valve
22mm differential bypass valve.
Fitted near the boiler, an automatic bypass valve is used to maintain a minimum flow rate through the boiler and to limit circulation pressure when other valves / water paths are closed.
£11.82
3 Bar Pressure Relief Safety Valve | 1/2" Female x Female
3 bar (43.5 PSI) 1/2 inch BSP female x female pressure relief / safety valve
Colour of plastic top may vary from picture (makes no difference to operation of valve).
£4.66
3 Bar Pressure Relief Safety Valve | 1/2" Female x Female
3 bar (43.5 PSI) 1/2 inch BSP female x female pressure relief / safety valve
Colour of plastic top may vary from picture (makes no difference to operation of valve).
£4.66
3 Bar Pressure Relief Safety Valve | 1/2" Male x Female
3 bar (43.5 PSI) 1/2 inch BSP male x female pressure relief safety valve.
Colour of plastic top may vary from picture (makes no difference to operation of valve).
£6.60
3 Bar Pressure Relief Safety Valve | 1/2" Male x Female
3 bar (43.5 PSI) 1/2 inch BSP male x female pressure relief safety valve.
Colour of plastic top may vary from picture (makes no difference to operation of valve).
£6.60
3 Bar Pressure Relief Safety Valve | 3/4" Female x Female
3 bar (43.5 PSI) 3/4 inch BSP female x female pressure relief safety valve. This size is quite unusual, normally these are found in 1/2 inch size. Colour of plastic top may vary from picture (makes no difference to operation of valve).
£7.99
3 Bar Pressure Relief Safety Valve | 3/4" Female x Female
3 bar (43.5 PSI) 3/4 inch BSP female x female pressure relief safety valve. This size is quite unusual, normally these are found in 1/2 inch size. Colour of plastic top may vary from picture (makes no difference to operation of valve).
£7.99
6 Bar Pressure Relief Safety Valve | 1/2" Female x Female
6 bar (87 PSI) 1/2 inch BSP female x female pressure relief safety valve.
Colour of plastic top may vary from picture (makes no difference to operation of valve).
£6.62
6 Bar Pressure Relief Safety Valve | 1/2" Female x Female
6 bar (87 PSI) 1/2 inch BSP female x female pressure relief safety valve.
Colour of plastic top may vary from picture (makes no difference to operation of valve).
£6.62
7 Bar Pressure Relief Safety Valve | 1/2" Female x Female
7 bar (101 PSI) 1/2 inch BSP female x female pressure relief safety valve.
Colour of plastic top may vary from picture (makes no difference to operation of valve).
£7.99
7 Bar Pressure Relief Safety Valve | 1/2" Female x Female
7 bar (101 PSI) 1/2 inch BSP female x female pressure relief safety valve.
Colour of plastic top may vary from picture (makes no difference to operation of valve).
£7.99
8 Bar Pressure Relief Safety Valve | 1/2" Female x Female
8 bar (116 PSI) 1/2 inch BSP female x female pressure relief safety valve. Colour of plastic top may vary from picture (makes no difference to operation of valve).
£12.89
8 Bar Pressure Relief Safety Valve | 1/2" Female x Female
8 bar (116 PSI) 1/2 inch BSP female x female pressure relief safety valve. Colour of plastic top may vary from picture (makes no difference to operation of valve).
£12.89
Pressure Reducing Valve With Gauge
15mm / 22mm connections.
With pressure gauge.
WRAS approved.
Maximum inlet pressure 16 bar.
Adjustable outlet pressure 1-6 bar (factory preset to 3 bar).
£24.91
Pressure Reducing Valve With Gauge
15mm / 22mm connections.
With pressure gauge.
WRAS approved.
Maximum inlet pressure 16 bar.
Adjustable outlet pressure 1-6 bar (factory preset to 3 bar).
£24.91
Spring Pressure Relief Safety Valve | 1/2" BSP
Brass 1/2 inch BSP pressure relief safety valve.
This valve has a simple (adjustable) spring loaded release mechanism with a lock ring to lock the adjuster in position.
£2.82
Spring Pressure Relief Safety Valve | 1/2" BSP
Brass 1/2 inch BSP pressure relief safety valve.
This valve has a simple (adjustable) spring loaded release mechanism with a lock ring to lock the adjuster in position.
£2.82
Water Pressure Gauge 0-4 Bar 1/4" BSP Back Connection
1/4 inch BSP 4 bar back entry pressure gauge with red reference pointer and scale in bars.
£9.93
Water Pressure Gauge 0-4 Bar 1/4" BSP Back Connection
1/4 inch BSP 4 bar back entry pressure gauge with red reference pointer and scale in bars.
£9.93
Water Pressure Gauge 0-4 Bar 1/4" BSP Bottom Connection
4 bar bottom connection pressure gauge with red reference pointer and scale in bars.
£9.93
Water Pressure Gauge 0-4 Bar 1/4" BSP Bottom Connection
4 bar bottom connection pressure gauge with red reference pointer and scale in bars.
£9.93