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Push on Fix Salterfix 5305 31

Part number (MPN)
112039BAX
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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 112039BAX fit?

The sources we checked list 112039BAX (Push on Fix Salterfix 5305 31, Baxi) for: Baxi Boston RS 40, Baxi Boston 2 OF 70, Baxi Floor Standing OF 501, Baxi Floor Standing RS 401, Baxi Floor Standing RS 501. Always check the model and serial number on the data plate before ordering.

Does 112039BAX have equivalent or superseded part numbers?

The sources we checked list no equivalents for 112039BAX. Ask a Baxi stockist to confirm.

What should I check before fitting 112039BAX?

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Some lists are dated and the part may have been superseded.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