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Fill-Trol Expansion Tanks

Amtrol's Fill-Trol expansion tank package consists of a diaphragm type Extrol tank and a factory installed Fill-Trol - an automatic pressure-reducing fill valve. The Fill-Trol package eliminates the need for purchase and installation of a separate fill valve, is adjustable up to 100psi and provides an accurate and reliable system make up. All Fill-Trol expansion tanks are factory pressurized to 12 psi.
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