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It signifies the specific negative pressure required to close the switch and allow the ignition control to proceed
leak-resistant installation on iron pipe size (IPS) systems
The internal indicator responds to the moisture content in the refrigerant
Enhanced Durability: Powder-coat epoxy cast iron housing provides excellent resistance to wear and corrosion
When you're on a job and need to restore critical functionality to a Bard system
Mepco (Dunham Bush) D4661 Trap 323080-701 It signifies the specific negativeThe Mepco (Dunham Bush) D4661 is a high performance 1 2" 1E SW straight way trap engineered for reliable condensate management in low pressure and sub atmospheric steam heating systems. Designed for horizontal installation, this thermostatic radiator trap features a rugged brass construction with a union inlet to simplify field mounting on radiators, convectors, and unit heaters. It operates effectively across a broad pressure range from 25" Hg vacuum
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