Worcester Bosch Return Manifold fits Greenstar CDI, Combi, Boilers

The Worcester return manifold (unit) manages the flow of heating water back into the boiler, supporting efficient circulation. Worcester return manifold it helps maintain stable pressure, improving heating consistency. Part number 87161064420 helps ensure correct fitment for compatible Worcester return unit. Brand new condition improves reliability and reduces the risk of leaks or poor flow Compatible Boilers.

Compatibility :

• Greenstar CDI: 25 CDI, 27 CDI HE, 27 CDI HE LPG, 30 CDI, 30 CDI HE, 30 CDI HE LPG, 35 CDI, 37 CDI HE, 37 CDI HE LPG, 40 CDI
• Greenstar CDI Classic: 29 CDI Classic, 29 CDI Classic LPG, 34 CDI Classic, 34 CDI Classic LPG, 38 CDI Classic, 38 CDI Classic LPG, 42 CDI HE Classic, 42 CDI HE Classic LPG
• Greenstar CDI Classic ErP: 29 CDI Classic ErP, 29 CDI Classic ErP LPG, 30 CDI Classic System ErP, 30 CDI Classic System ErP LPG, 34 CDI Classic ErP, 34 CDI Classic ErP LPG, 35CDI Classic System ErP, 35 CDI Classic System ErP LPG, 38 CDI Classic ErP, 38 CDI Classic ErP LPG, 42 CDI Classic ErP, 42 CDI Classic ErP LPG
• Greenstar i System & Junior: 12 i System, 12 i System LPG, 15 i System, 15 i System LPG, 18 i System, 18 i System LPG, 24 i System, 24 i System LPG, 24 i Junior HE, 24 i Junior HE LPG, 28 i Junior HE, 28 i Junior HE LPG
• Geenstar Si: 25 Si, 25 Si LPG, 30 Si, 30 Si LPG

Important fitting advice

We recommend that all parts are fitted by a fully qualified Gas Safe registered engineer. If you need help confirming the right part, contact us our team has 10+ years of boiler spares knowledge and friendly chat support to help you quickly.

Delivery

At Boiler Spares Hub, we dispatch orders within 1 working day (Monday-Friday). Orders placed outside working days will be dispatched on the next working day. For delivery options available for this product, please add it to your basket or check our delivery options page.

Returns

We accept 30-day returns. Returns must be in an unopened, sealed box. If we find the item has been used or installation was attempted, we may refuse the return.

Frequently Asked Questions (FAQs)

1. What is the Worcester Return Manifold 87161064420?
It’s a return-water manifold used inside certain Worcester Bosch boilers to route heating water back into the boiler for proper circulation.

2. What does a return manifold do in a boiler?
It manages the return flow from the heating system, helping maintain steady circulation and supporting stable boiler operation.

3. What symptoms can indicate a faulty return manifold?
Leaks, low system pressure, poor circulation, uneven heating, or repeated pressure drops (depending on where the fault/leak is).

4. How do I confirm compatibility before ordering?
Match the part number 87161064420 with your boiler’s model/series details and compare against the compatibility list in the product description.

5. Is this part suitable for combi, system, or regular boilers?
It’s commonly listed for multiple Worcester ranges (combi and system models), but compatibility depends on the exact boiler model/variant.