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What do the three different pressure ratings represent
A separate DIN cable plug (Form A) is usually required to complete the electrical connection if the existing one is damaged
High-Performance Bladder: Features a durable butyl diaphragm that separates air from water
Universal Compatibility: Serves as a direct replacement for Robertshaw 41-405
System Integrity: Engineered to work seamlessly with integrated furnace control boards to prevent nuisance flame sense errors
Johnson Controls A-4000-146 Filter Els PW 17895 What do the three differentJohnson Controls A 4000 146 Filter, Carbon, 20 Scfm, 100% Efficient for Particles as Small as . 025 Microns This item is not qualify for free shipping.