Electric hot water thermostat ST12-70K

 Adjustable 50 – 70 Degrees C 

 Thermostat & Manual Reset

 Over temperature Control

 Used on single element mains pressure electric water heaters.

 Designed for the new generation of Hot Water Thermostats to replace the EWT Series

Manufactured for the Australian market.

The Robertshaw Single Adjustable 50–70 Degrees C Thermostat provides reliable temperature control for modern electric hot water systems. With an adjustable range between 50°C and 70°C, this thermostat ensures safe and consistent hot water delivery in residential and commercial applications.

This model includes both a thermostat and manual reset function, giving users full control and added protection. It also features over-temperature control, which enhances system safety by shutting down operation if water exceeds safe levels. Installers commonly use this thermostat on single-element mains pressure electric water heaters, making it a practical replacement component.

Manufactured for the Australian market, the Robertshaw ST12-70K replaces the older EWT Series. Unlike its predecessor, this updated design uses fewer metal parts, which reduces wear and improves overall durability. Furthermore, it incorporates the latest temperature control technology, allowing it to react faster to changes in water temperature. This quicker response helps maintain water at the desired level with greater accuracy.

As a result, the system runs more efficiently, supporting energy savings and improved operating performance. Because of its precision and modern engineering, the ST12-70K stands out as a reliable choice for those maintaining or upgrading their hot water heater thermostat.

By choosing this thermostat, you gain a durable, efficient, and accurate replacement part for single-element mains pressure water heaters, ensuring safe operation and consistent hot water supply.

Replaces: W1M2/70, EWT1L2-513, EWT1L2-513N,  EWT1L2-513L,  EWT1L2-540,  EWT1L2-523,  Stamped ST1201133

If you are not 100% sure if this is the correct part for your model, please send your model number to us via email and we will confirm or correct your selection

(All hard wired electrical items must be installed by a licenced electrician)