Worcester Bosch Boiler Filling Key (Small)The Worcester Filling Key is an essential component for refilling and maintaining the water pressure in Worcester boilers. Specifically designed for use with various Worcester Greenstar, Compact, and Junior series boilers, this Worcester Bosch key (part number 87161045910) is new and backed by a 12-month warranty, ensuring reliability and quality for every Worcester boiler user.How to Fill a Worcester Boiler with a KeyTo refill your Worcester boiler using the filling key, insert it into the filling loop, usually located beneath the boiler. Turn the key and open the valve to allow water to enter the system. Monitor the pressure gauge and stop filling once it reaches the recommended level. This quick and efficient method ensures your boiler stays in top condition, reducing the chance of low-pressure issues.How to Fill a Worcester Boiler Without a KeyIf your Worcester boiler does not have a filling key or if you misplaced it, you can use an external filling loop. Attach this to the cold water pipe and the boiler inlet, then open the valves to fill the system. Always watch the pressure gauge and stop when it reaches the optimal level. Consult a Gas Safe engineer for assistance if needed to avoid overfilling or damaging the system.Compatible Boiler SeriesWorcester Compact BoilersGreenstar CDI Compact BoilersGreenstar CDI Classic BoilersGreenstar i Combi BoilersGreenstar i Junior BoilersGreenstar Si Compact BoilersGreenstar i System BoilersShipping & ReturnsOrders placed by 1:00 p.m. EST (Monday–Friday) are shipped the same day, with next-day delivery options. Orders placed on Fridays arrive Monday unless you select Saturday delivery at checkout. Aspire Heating prioritizes your satisfaction. If your order doesn’t meet your needs, you can return it within 30 days. Please read our full Return Policy for more information.
