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Flow Water Switch

Part number (MPN)
6149303
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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 6149303 fit?

The sources we checked list 6149303 (Flow Water Switch, Sime) for: Sime Ecomfort 25 HE System, Sime Ecomfort Plus 25 HE System, EV HE 12 SYSTEM NG, EV HE 20 SYSTEM NG, EV HE 25 SYSTEM NG, EV HE 30 SYSTEM NG, EV HE 35 SYSTEM NG, Sime Murelle EV HE 20 T, Sime Murelle EV HE 25/55, Sime Murelle EV HE 25, Sime Murelle EV HE 25 T, Sime Murelle EV HE 30 T, Sime Murelle EV HE 35 T. Always check the model and serial number on the data plate before ordering.

Does 6149303 have equivalent or superseded part numbers?

The sources we checked list no equivalents for 6149303. Ask a Sime stockist to confirm.

What should I check before fitting 6149303?

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Some lists are dated and the part may have been superseded.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