The Ideal 139717 is a Flow Switch used in the heating system of Ideal boilers. The flow switch monitors the flow of water within the boiler system. It plays a crucial role in ensuring that there is adequate water flow to protect the boiler from overheating and to facilitate proper operation.

Please verify compatibility with the specific model and version of the boiler. For accurate installation and optimal performance, it's advisable to consult with a professional installer or refer to the manufacturer's specifications.