Ideal Pressure Relief Valve Kit 174811

The Ideal 174811 is a pressure relief valve kit manufactured by Ideal Heating for use in its Esprit range of gas boilers. The valve sits on the heating circuit and opens automatically when system pressure rises above its set limit, discharging water through the discharge pipe to protect the boiler and its components from over-pressurisation. It is supplied as a kit rather than a bare valve, so the parts needed to complete the swap are grouped under one part number.

• Water continually dripping or running from the boiler discharge pipe when the system is cold
• System pressure falling repeatedly and needing regular top-ups, with no visible leak elsewhere on the circuit
• The valve fails to reseat after being operated manually, so the discharge pipe keeps passing water
• Scale or debris visible around the valve outlet or seat, causing it to weep under normal running pressure
• Pressure gauge climbing steadily with no heat demand, indicating the valve is not relieving as it should

• Check the GC number on the appliance data badge against the compatibility list to confirm the correct valve for your model
• Confirm the part number on the existing valve or the boiler's parts list matches 174811, 1780134 or N6492 before ordering
• Inspect the valve connection and seating face for scale or damage, and replace any seal or washer that shows signs of hardening or distortion