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Mounting Flange Seal - Press/40 G5BF

Part number (MPN)
RBS31

OEM Replacement Part & Compatibility Table

Brand
Guide price (£)
Not available: check the current price with the seller
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

  • Riello G3Bf 490T52 3749052
  • Riello G5Bf 489T51 3748951
  • Riello G5Bf 489T56 3748956
  • Riello G5Bf 489T57 3748957
  • Riello G5Bf 491T51 3749151
  • Riello G5Bf 491T56 3749156
  • Riello G5Bf 492T51 3749251
  • Riello G5Bf 492T56 3749256
  • Riello G5Bf 493T51 3749351
  • Riello RDB 483T50
  • Riello RDB 484T50
  • Riello RDB 487T50

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

Frequently asked questions

Which appliances does RBS31 fit?

The sources we checked list RBS31 (Mounting Flange Seal - Press/40 G5BF, Riello) for: Riello G3Bf 490T52 3749052, Riello G5Bf 489T51 3748951, Riello G5Bf 489T56 3748956, Riello G5Bf 489T57 3748957, Riello G5Bf 491T51 3749151, Riello G5Bf 491T56 3749156, Riello G5Bf 492T51 3749251, Riello G5Bf 492T56 3749256, Riello G5Bf 493T51 3749351, Riello RDB 483T50, Riello RDB 484T50, Riello RDB 487T50. Always check the model and serial number on the data plate before ordering.

Does RBS31 have equivalent or superseded part numbers?

The sources we checked list no equivalents for RBS31. Ask a Riello stockist to confirm.

What should I check before fitting RBS31?

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.

Related parts

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Some lists are dated and the part may have been superseded.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