Ideal Drain Vent 1/4 Inch 177767

The Ideal 177767 is a 1/4 inch drain vent used on Ideal and Keston heating appliances, listed by the supplier for HIU (heat interface unit) applications. It provides a vented drain point so waste water can be discharged from the unit while the drain line is allowed to breathe, reducing the risk of airlocking and backflow. The item is supplied under Ideal part number 177767 and is also listed under the numbers 337221 and 1783104.

• Water weeping or pooling around the drain vent connection
• Waste water failing to clear from the appliance or drain line
• Gurgling or airlocking in the drain run
• Visible cracking, corrosion or heavy scale on the vent body
• Damp staining on the casing or the surface beneath the drain point

• Confirm your appliance model against the compatibility list before ordering.
• Check the numbers on the existing part — 337221 and 1783104 identify the same item.
• Inspect the sealing washer or gasket at the drain connection and renew it if it is perished or compressed.