Ideal Washer 177978

This is a washer supplied by Ideal for use in its commercial boiler range. It is listed under the gaskets, o-rings, seals and washers group of Ideal spare parts, and its function is to seat between mating faces in the appliance and close off the joint against leakage. It is a service item, so it is normally replaced whenever the joint it sits in is broken and remade.

• Water weeping or a visible drip at the joint the washer seals
• Damp staining, corrosion or limescale tracking around the mating faces
• The washer is flattened, hardened, split or deformed once the joint is opened
• A joint that continues to seep after being tightened down
• Scale or debris embedded in the washer face, preventing it from sealing cleanly

• Confirm the appliance model and, where available, the serial number against the compatibility list before ordering.
• Check the part number on the appliance or in the manufacturer's literature matches 177978 or 4035464.
• If the joint being disturbed contains other seals, inspect them at the same time and replace any that are hardened or damaged.