McDonnell & Miller Series TC-4 Test-N-Check® Valves
• For hot water boilers
• Simplifies ASME CSD-1 code mandated testing of low water cut-offs by eliminating the need to drain the system
• Includes one upper and one lower valve for mounting at crosses in equalizing lines
• Restricts water flow when the low water cut-off’s blowdown valve is open
• Adjustable built-in vacuum breaker in upper valve provides rapid evacuation of water from the float chamber
• 1″ NPT
• Maximum temperature 250°F (121°C)
• Maximum pressure 160 psi (11 kg/cm2)
