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O Ring Pack 20

Part number (MPN)
39837850
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Type your appliance model: we compare it with the 3 appliances in our sources.

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Parts for the same appliances

OEM Replacement Part & Compatibility Table

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Source
retailer parts list
checked 2026-11-06
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 39837850 fit?

The sources we checked list 39837850 (O Ring Pack 20, Ferroli) for: Ferroli Optimax HE Plus 31C, Ferroli Optimax HE Plus 38C, TECH 38 C COMBI NG. Always check the model and serial number on the data plate before ordering.

Does 39837850 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 39837850. Ask a Ferroli stockist to confirm.

What should I check before fitting 39837850?

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Some lists are dated and the part may have been superseded.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.