Ideal Flap Flange Unit 120 x 120 176263

The Ideal 176263 is a flap flange unit measuring 120 x 120, produced by Ideal for its commercial appliance range and listed under the Keston brand. It is the plate-and-flap component that sits at the flue outlet of the appliance, where the flap governs the opening at the terminal and the flange provides the mounting face around it. The part is supplied as a single unit and is identified on the appliance by the manufacturer code 176263.

• The flap no longer seats correctly and stays open or partially open at the terminal.
• Visible cracking, distortion or corrosion on the flange face or the flap itself.
• The flap rattles or vibrates in normal operation.
• Water, debris or draughts entering past the terminal where the flap should close.
• The flange no longer sits flush against its mounting face, leaving a gap around the outlet.

• Confirm the appliance model and serial number, then match the manufacturer code 176263 against the data plate or the compatibility list.
• Note the alternative number 1180347, which may appear on older documentation or labels for the same component.
• Check the condition of any gasket or seal at the mounting face while the appliance is open, and replace it if it is perished.
• Work on the flue and terminal should be carried out by a competent engineer, with the appliance isolated and made safe first.