the NEMA 4 enclosure is specifically designed to withstand outdoor conditions

it integrates seamlessly with Trane chiller series including the RTHD

Its heavy-duty construction is built to withstand the rapid cycling common in high-efficiency heating applications

Engineered for tight spaces

It serves as a direct replacement for legacy part numbers such as Lochinvar ARM2801 and A

Resideo V8043F1093 Valve 318973-401 the NEMA 4 enclosure isThe Resideo V8043F1093 is a heavy duty, 3 4 inch sweat connection zone valve designed for precision flow control in closed loop hydronic systems. Built with a rugged brass body and a stainless steel stem, this 24Vac motorized zone valve is engineered to withstand static pressures up to 300 psi and fluid temperatures reaching 200F. As a normally closed zone valve, it utilizes a reliable spring return mechanism to ensure a positive shut off when de