BELL & GOSSETT AQS-3/4 Aquastat Control for Bronze Pumps for 3/4" Pipe. Designed to thermostatically turn any B&G NBF circulator ON and OFF. The AQ-3/4 will switch the pump OFF at 120 F (48.9 C) and ON at 100 F (37.8 C)Replaces Bell & Gossett 113221
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