the NEMA 1 enclosure is intended for indoor duct mounting

but always verify the specific spring range and orifice sizing for your fuel type and BTU requirements before commissioning

Whether used for makeup water in pressure washers or maintaining levels in livestock watering tanks

as well as 1" Sweat connections

Lochinvar & A.O. Smith 100288537 Flange 340155-7024 the NEMA 1 enclosure isThe Lochinvar & A. O. Smith 100288537 Flange is a critical OEM replacement part engineered for high recovery heating systems and EnergyRite pool heaters. This 2 inch ER flange is designed to facilitate a robust, leak free connection between the heat exchanger and the water supply piping. Built for commercial and industrial HVACR applications, the 100288537 ensures hydraulic integrity in systems where thermal expansion and high flow velocities are