Ideal 170704 Sit Nova Gas Valve 0.820.030 Boxed

The Ideal 170704 is a SIT NOVA gas valve, referenced under the SIT number 0.820.030. It is a gas-carrying control component used on Ideal domestic boiler appliances, where it regulates the flow of gas to the burner in response to demand from the boiler's control system. The valve sits on the gas train between the incoming supply and the burner assembly, and its internal diaphragm and solenoid sections govern when and how much gas is admitted for ignition and modulation.

• The boiler fails to light, or lights and then drops out shortly afterwards
• The burner will not hold a flame, with repeated lockouts on the control panel
• Gas pressure at the burner is unstable, causing rough or uneven firing
• The valve body shows signs of leakage, staining or a detectable gas odour around the gas train
• The boiler cycles on and off without reaching or holding the set flow temperature

• Confirm the part number on the existing valve matches IDEAL170704 or the SIT reference 0.820.030 before ordering
• Check the alternative numbers 2000800001 and 170704 against any documentation supplied with the appliance
• Inspect the gas train seals and washers at the same time, as these are disturbed when the valve is removed
• This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.