The Armstrong Glycol Auto-Fill Units provide automatic glycol make-up for HVAC systems. The specially molded mixing tank offers a compact package with built-in housing for controls and make-up pump. With Polypropylene (holding tank), bronze (pump, isolation and check valves), stainless steel/brass (fill ball valves) this product is suitable for all bladder and compression tanks up to 90 psi (621 kPa) cold-fill pressure. Safe and reliable, glycol auto-fill units provide: 

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• Large mixing tank, accommodating system overspill through safety valve and low fluid-level warning (Automatic cut-out switch monitors tank status and shuts down the pump in the event of critical mixture levels) 

• Standardized, professional component sourcing and factory assembly for maximum lifetime performance 

• Single source responsibility for best product lifetime support