Early Holiday Savings Are Here! 

25% OFF ALL Products!

Get a head start on the holiday season with our Early Holiday Savings Event! Enjoy a massive 25% discount on every product storewide — no exclusions, no codes needed.

Whether you're replacing essential parts, upgrading your system, or stocking up for the winter, now is the perfect time to save big. But hurry — inventory is limited and deals won’t last long!

This Early Holiday Sale ends December 4!

Outdoor boiler aquastats MUST BE PRE-PROGRAMMED for use with an outdoor boiler. ALL aquastats sold by OutdoorBoiler.com are custom programmed for outdoor boiler use through digital interface - programming cannot be performed manually.

This aquastat provides controller functions, and serves as a thermostat and water level switch. This product meets specifications for many outdoor boiler models including GX10, GX15, GX30 and others. 

This controller includes the temperature probe cable, 9.5 feet long. The brass temperature probe is 1.5 inches long, and 0.25 inches in diameter. It is recommended to secure temperature probe in thermo-well using high-temp caulk available here.