Worcester Seal 87101031910

Worcester Shaped Fits various Worcester Greenstar appliances.

The Worcester Seal (Part No. 87101031910) is a genuine OEM (Original Equipment Manufacturer) rubber sealing component used across a wide range of Worcester Bosch appliances. This specialized gasket is typically utilized in hydraulic or gas-train assemblies to provide a flexible, pressure-resistant barrier. As a genuine Worcester part, it is manufactured from high-grade elastomers designed to resist degradation from heat and chemical exposure found within the heating system.

Key Features and Specifications
Durable Elastomer Material: Resistant to thermal cycling and the chemicals found in both central heating water and fuel gas.

Precision Profile: Engineered to seat perfectly within the grooves of Worcester's manifold or pipework assemblies to prevent leaks.

Genuine Worcester Bosch Part: Ensures the seal meets the exact shore hardness (flexibility) required to maintain integrity under system pressure.

Versatile Use: Depending on the specific boiler revision, this seal may be used in the flow turbine assembly, the heat exchanger interface, or secondary gas-side components.

Direct Fit: Designed for quick replacement during maintenance to restore a watertight or gastight connection.

Boiler Compatibility
This seal is used extensively throughout the Worcester Greenstar range. Compatible models include:

Greenstar CDi (Classic & Highflow): 25CDi, 30CDi, 35CDi, 40CDi, 42CDi.

Greenstar i Junior: 24i Junior, 28i Junior.

Greenstar Si: 25Si, 30Si.

Greenstar Ri: 12Ri, 15Ri, 18Ri, 24Ri.

Greenstar Heatslave: Various oil-fired models.

Technical Tip: Whenever a hydraulic or gas connection is broken during service, the existing seal should be discarded and replaced with a new one. Rubber seals like the 87101031910 take a permanent "set" over time; reusing them is a leading cause of intermittent leaks or "weeping" connections.

Essential Companion Products
To ensure a professional and secure repair, the following genuine Worcester parts are frequently checked or replaced alongside this seal:

Hydraulic Sealing: Worcester O-ring – 87161138330

Gas-Side Integrity: Worcester Gas Valve Gasket – 871860034A0

Gas-Side Integrity: Worcester Gas Valve Gasket – 87161068000

Flue Safety: Worcester Exhaust Seal 59Dia – 8737711102

Hardware: Worcester Retaining Nut – 87161066830

Specialist Support and Local Collection
Are you performing a repair and unsure where this specific seal is located within your boiler’s assembly? Our trade counter team can assist you in identifying the correct part using your boiler's GC number or exploded diagram.

Visit our trade counter and Bathroom Showroom at 61 Fullers Road, E18 2QB for expert technical advice and immediate access to genuine Worcester Bosch spares.