Worcester 8716122887 (87186506550) Expansion Vessel + PRV 87186439890

Description

Worcester 8716122887 (Was 87186506550) Expansion Vessel + PRV 87186439890

The Genuine Worcester 87186506550 Expansion Vessel is an original manufacturer pressure vessel designed for selected Greenstar 4000 boilers.

This unit includes the Pressure Relief Valve (PRV) 87186439890, providing full pressure control and safety protection.

The expansion vessel absorbs system pressure increases during heating cycles. When the diaphragm fails, you may experience:

• Boiler losing pressure regularly

• Pressure rising above 3 bar

• Water discharging from the PRV

• Frequent need to top up the system

Replacing the expansion vessel restores stable pressure and prevents repeated PRV discharge.

Manufactured by Worcester Bosch, this is a genuine spare ensuring correct fitment and reliability.

Worcester Greenstar 4000 (GR4700IW) System Models

• GR4700IW 12s LPG – 41-800-08 (7733600378)

• GR4700IW 12s NG – 41-800-07 (7733600377)

• GR4700IW 15s LPG – 41-800-10 (7733600380)

• GR4700IW 15s NG – 41-800-09 (7733600379)

• GR4700IW 18s LPG – 41-800-12 (7733600382)

• GR4700IW 18s NG – 41-800-11 (7733600381)

• GR4700IW 21s LPG – 41-800-14 (7733600384)

• GR4700IW 21s NG – 41-800-13 (7733600383)

• GR4700IW 24s LPG – 41-800-16 (7733600386)

• GR4700IW 24s NG – 41-800-15 (7733600385)

 Worcester Greenstar 4000 Combi Models

• GR4700IW 25c LPG – 47-800-31 (7733600372)

• GR4700IW 25c NG – 47-800-30 (7733600371)

• GR4700IW 30c LPG – 47-800-33 (7733600374)

• GR4700IW 30c NG – 47-800-32 (7733600373)

• Please note: Before placing your order you must check your part matches the Manufacturer Part Number stated above.
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   Prices: Please note all prices are inclusive of VAT.

  At Heating and catering parts,

  We certainly strive to provide the best possible customer experience. Consequently, we understand that sometimes a product may not meet your expectations or requirements. That is why we offer a comprehensive 30-day return policy to ensure your satisfaction. Please read our full Return Policy

  We appreciate you buying from our store. Usually, If your order is received by 1:00 p.m. EST (Monday–Friday), we will ship the item the same day. You can count on us to deliver quickly and safely. In other words, we take pride in our prompt and trustworthy service and will do everything we can to ensure the safe arrival of your package.

  Please note that weekends are not included in our next-day delivery guarantee. Delivery for orders placed on Fridays (the next day) is on the following Monday. At the same time select the Saturday delivery option at checkout if you’d like your purchases delivered on a weekend day.