Worcester Greenstar Combi Water Valve – Refurbished | Part No. 87170021100

The water valve manages water flow and pressure inside a combi boiler, balancing distribution between heating and hot water functions — once faulty, it can cause fluctuating hot water temperature or reduced flow. The Worcester Greenstar Combi Water Valve 87170021100 (Refurbished) is the correct replacement across the wide Greenstar HE, HE Plus, R, FSN, FSP, RD, and ZWBR ranges, restoring reliable, balanced operation.

This is a professionally refurbished genuine Worcester component, cleaned, rebuilt, and tested before dispatch. Minor cosmetic marks may be present, consistent with removal from a working boiler. Supplied with a full 12-month warranty.

Compatible Worcester Greenstar Boiler Models

Refurbished. Cleaned, Rebuilt & Tested. 12-Month Warranty.

Every refurbished 87170021100 water valve is cleaned, rebuilt, and tested to OEM standards, restoring balanced water flow across the Greenstar HE, HE Plus, R, FSN, FSP, RD, and ZWBR ranges. Supplied with a full 12-month warranty.

Delivery & Returns

Orders placed before 1:00 PM (Mon–Fri) are dispatched the same working day. Standard and next-day delivery available at checkout. Returns accepted within 30 days in original, unused condition.

Note: Please confirm that part number 87170021100 matches your existing component before ordering. Must be fitted by a Gas Safe registered engineer.

Product Reference