Conbraco 21-104-03 Valves 326058-755 What is the difference between

What is the difference between this and a pressure vacuum breaker (PVB)

In many retrofits

Universal Compatibility: Works with single-stage

For service technicians addressing low-torque startup issues in commercial refrigeration or residential air conditioning

this high temperature limit switch monitors internal ambient conditions and automatically breaks the control circuit if temperatures reach the 240-degree Fahrenheit threshold

Conbraco 21-104-03 Valves 326058-755 What is the difference betweenThe Conbraco 21 104 03 is a professional grade water gauge valve set designed for reliable fluid level monitoring in commercial boiler and tank applications. Constructed from high quality rough bronze, these 1 2" NPT male valves feature extended shanks to facilitate easier installation through thick insulation or vessel walls. The assembly utilizes an EPDM glass seal and Teflon stem packing to ensure leak free performance under thermal cycling. Rated