What to check before buying
- Find the tap model or product code and use its parts diagram to identify the required component.
- Compare the washer’s outside diameter, inside hole and thickness with the specified replacement or dimensioned drawing.
- Check material and profile against the manufacturer’s recommendation; a flat washer and O-ring are not equivalent.
- Read the quantity of each size in a mixed pack and retain the exact part code for repeat purchases.
Reference & scope
Bristan model-specific valve and spare-part guidance
This page is a selection checklist for a product type. The manufacturer instructions and exact retailer listing determine suitability, included accessories and available variants.