Johnson Controls WZ-1000-4 Well 319852-301 While the FS7-4W is water-tight

While the FS7-4W is water-tight (NEMA 4X)

Durable Construction: Features a brass trim and bronze body for superior thermal stability and longevity

Built on a heavy-duty plated steel frame with laser-welded bellows

Ease of Service: Direct-swap assembly with a pre-wired fan cable connector and rubber grommet for simplified field replacement

Johnson Controls WZ-1000-4 Well 319852-301 While the FS7-4W is water-tightThe Johnson Controls WZ 1000 4 is a professional grade immersion well engineered for precision temperature monitoring in hydronic and pneumatic control systems. Constructed from 304 stainless steel, this bulb well provides superior corrosion resistance and structural integrity in demanding HVACR environments. Featuring a 1 2 inch inside diameter (ID) and 1 2 14 NPT external threading, it ensures a secure, leak proof thermowell installation. This