Hoffman Specialty 401485 Water Vent R-22 it allows the gas valve

it allows the gas valve to remain open

Failure to use the exact water column rating specified by the manufacturer can lead to nuisance trips or unsafe operating conditions

Heavy-Duty Stability: Nickel-chromium coils and corrosion-resistant mounting plates prevent sag and premature failure under high-demand cycles

If you notice signs of compression set

the Danfoss AK-CC 210 supports multiple sensor inputs (Pt 1000

Hoffman Specialty 401485 Water Vent R-22 it allows the gas valveThe Hoffman Specialty 401485, or Model 78 Water Main Vent Valve, is a high capacity automatic air vent designed for efficient air elimination in hydronic heating and cooling systems. Engineered for closed loop hydronic systems, this vent features a 3 4" NPT connection and is built to withstand a maximum pressure of 150 PSI. Its primary function is to purge air from water mains and large distribution lines, preventing air bound system issues that lead