Description
Fill-Trol combines a boiler system expansion tank with an automatic fill valve to control system pressure. This eliminates the need for a separate, automatic fill valve.
Features
- Eliminates the Need for a Separate, Automatic Fill Valve.
- Strongest Tank Design Featuring Deep Drawn Steel.
- Thick, Butyl Diaphragm.
- Adjustable to a Maximum 100 PSIG Working Pressure.
- Available in 2 through 14 Gallon Sizes.
- Combination Packages Include an Air Purger (Model 443 1” or 444 1 ¼”) and an Air Vent (Model 700-C).
Application
- For use in closed, hydronic heating systems to control fill pressure and pressure build-up.
- Accepts expanded water as system temperature rises and return hot water to systems when demand occurs.


