The HVAC air prover includes a 1/8" NPT connection and a 90-degree tube fitting

it operates within a pressure range of 5-200 PSI for air

Efficiency Optimization: Reduces belt slippage and system resonance

provided the original part matches the 626421 series

and residential furnace models

Maxitrol RV81-1 1/4 Regulator Freon The HVAC air prover includesThe Maxitrol RV81 1 1 4 is a specialized appliance gas regulator engineered for high capacity applications requiring precise pressure control at low inlet levels. Utilizing Maxitrols signature Straight Thru Flow (STF) design, this 1 1 4" NPT unit employs a unique conical valve that allows fuel to pass through without directional changes. This profile significantly reduces frictional resistance, enabling a massive 4,500,000 BTU hr capacity while