BASO H43AA-12 Pilot Valve

The BASO H43AA-12 Pilot Valve is a 3/8" NPT automatic shut-off gas valve designed for mission-critical safety in commercial and residential heating systems. Engineering for versatile application, this Baso H43 pilot valve handles both Natural Gas and Liquid Propane (LP) at pressures up to 0.5 PSI. A defining mechanical feature is the 1/4" compression coupling pilot tap located on the right side, which provides an opposite gas flow configuration relative to the main valve. This specific geometry is essential for precise manifold alignment where standard flow valves fail to fit. The unit includes an integrated manual shut-off, allowing technicians to isolate the pilot line during maintenance without disrupting the main gas supply. As a direct replacement, the H43AA-12 is identical to the H43AA-12C, ensuring seamless field installation. When troubleshooting standing pilot systems, this valve provides the reliable 100% shut-off capability required for compliance and equipment longevity.

• Compatible with Natural Gas and LP applications up to 0.5 PSI.
• Features a right-hand pilot tap with opposite gas flow for specific manifold configurations.
• Integrated manual shut-off valve simplifies field servicing and diagnostic testing.
• Compact 3/8" NPT inlet/outlet ports allow for installation in tight equipment cabinets.
• Robust automatic gas shut-off mechanism prevents gas accumulation if the pilot flame is extinguished.

How do I verify the gas flow direction on the BASO H43AA-12?
This specific model is engineered with a pilot flow that is opposite to the main valve flow. Always check the embossed arrows on the valve body to confirm your manifold layout matches this configuration before installation.

Can the H43AA-12 be used with a 1/8" pilot line?
The standard pilot tap on this unit is a 1/4" compression coupling. To use a 1/8" pilot tube, a proper brass reducer bushing must be used to ensure a leak-proof seal.

Is this valve a drop-in replacement for the H43AA-12C?
Yes, the H43AA-12 and H43AA-12C are technically identical in form, fit, and function, sharing the same physical dimensions and pressure ratings.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.