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O-Ring Dalmar R12

Part number (MPN)
6226421
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Source
retailer parts list
checked 2026-11-05
Fitting notes

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

Compatible appliances

Always check the model and serial number on the data plate before ordering.

Frequently asked questions

Which appliances does 6226421 fit?

The sources we checked list 6226421 (O-Ring Dalmar R12, Sime) for: Sime Ecomfort 25 HE, Sime Ecomfort 30 HE, Sime Ecomfort 35 HE, Sime Format 100 B, Sime Format 100 C, Sime Format 110 C, Sime Format 25 HE, Sime Format 30 HE, Sime Format 80 B, Sime Format 80 C, FORMAT TECHNYL NG, FRIENDLY FORMAT TECHNYL CBI NG, Sime Friendly Technyl Format 80, Sime Friendly Technyl Format 80E. Always check the model and serial number on the data plate before ordering.

Does 6226421 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 6226421. Ask a Sime stockist to confirm.

What should I check before fitting 6226421?

Work on gas appliances must be carried out by a Gas Safe registered engineer. Check the model and serial number on the boiler data plate. Source: a parts retailer's list, not the manufacturer's: confirm the part number on the data plate or with the manufacturer before ordering.

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Some lists are dated and the part may have been superseded. Information only, compatibility not guaranteed.