The AMTROL FILL-TROL system consists of a specially adapted EXTROL pre-pressurized, diaphragm-type expansion tank, and the FILL-TROL, a specially designed, automatic, fill valve
Sealed air cushion - factory pre-charged and 100 percent tested
12 psig factory pre-chargedd
Strong, deep-drawn steel tank
Projection-welded air stem maintains precharge setting
Tank pressure controls system fill
Spring-loaded check valve
Automatic shut-off valve spring
Removable strainer
Cold water supply
Expansion bypass
Accepts expanded water as system temperature rises to reduce pressure build-up
Fill gate stem
Eliminates need for a separate, automatic fill valve
Fully adjustable
Helps reduce energy consumption and reduces system wear
Automatic air vent eliminates system air
Air purger separates air from water
System connection sets the point of no pressure change
