Smith 100187859 Switch is a critical 2

the Bard 5151-045BX is calibrated for specific static pressure and CFM targets

While the 1740 RPM and 2 HP ratings may match

the materials are selected for industrial-grade durability

this kit is specifically engineered to replace the factory-installed regulator spring and orifices

Bradford White 415-48058-02 Pressure Switch 320734-701 Smith 100187859 Switch is aThe Bradford White 415 48058 02 Pressure Switch is a critical safety component engineered for high altitude applications in specific power vented gas water heaters. This OEM pressure switch is calibrated to detect proper venting conditions and ensure the inducer motor is moving sufficient combustion air before ignition occurs. Designed for elevations where air density is lower, this 0. 30" W. C. pressure switch prevents the burner from firing if the