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The Armstrong International 75A3 Trap is a high-performance 3/4" NPT steam trap designed for industrial heating applications requiring efficient condensate removal and rapid air venting
This factory authorized part ensures precise variable speed control
Corrosion Resistance: Nickel-plated construction prevents premature lead failure due to high-heat oxidation
The Watts 0881430 Gasket Kit is a field-critical replacement set engineered specifically for 2-inch Series 3001 Lead Free dielectric unions
it does not come with a rigid base for floor mounting
Aprilaire 4740 Relay 320788-704 The Armstrong International 75A3 TrapThe Aprilaire 4740 Relay is a critical replacement component engineered specifically for Aprilaire 700 series humidifiers, including the 700A and 700M models manufactured after 2008. As a genuine AprilAire humidifier part, this fan relay is responsible for powering the circulator fan when the humidistat signals for moisture. Unlike older "Series One" versions that utilized the 4238 control board with an integrated transformer, this modern 24V
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