BASO Y90AA-4212 Orifice

The BASO Y90AA-4212 Orifice is a precision-engineered 0.012-inch pilot orifice designed for reliable ignition performance in commercial and industrial gas systems. This component features a 1/4" CC compression coupling inlet, ensuring a leak-free seal for HVAC gas pilot burners. Built with a durable aluminum-lined body, it is optimized for dual-fuel versatility, compatible with Liquid Propane (LP) and Natural Gas applications. For technicians searching for the PB-002.01 orifice, the Y90AA-4212 is a direct identical replacement, maintaining factory-spec flame stability and flow regulation.

Engineered for use in Intermittent Pilot Ignition (IPI) and Standing Pilot Ignition (SPI) systems, this orifice includes a 164-degree dual orifice counterbore. This technical design promotes consistent pilot flame direction, preventing common nuisance lockouts caused by unstable flame sensing. Whether you are performing routine furnace pilot maintenance or rebuilding a commercial gas burner assembly, using a genuine BASO pilot orifice ensures the manifold pressure and BTU output remain within safe operating parameters for long-term field reliability.

• Universal Compatibility: Rated for Natural Gas, Butane, and LP systems with a high-precision .012 drill size.
• Rugged Construction: Aluminum-lined inlet body provides superior corrosion resistance compared to standard brass fittings.
• Drop-in Replacement: Identical to manufacturer part PB-002.01 for seamless integration into existing pilot strings.
• Optimal Performance: 164° counterbore design stabilizes the pilot flame for improved ignition and combustion efficiency.
• Secure Fitting: Standard 1/4-inch compression coupling facilitates a tight connection to aluminum or copper pilot tubing.

Is the BASO Y90AA-4212 compatible with my current pilot burner?
This orifice is a standard component for the Y90 series pilot burners. Verify your existing orifice size and inlet fitting (1/4" CC) to ensure a correct match for your specific burner head configuration.

Can I use this orifice for both Natural Gas and Propane?
Yes, this specific orifice is optimized for multi-fuel use. However, always verify your equipment's manifold pressure requirements and nameplate specifications before swapping fuels.

How do I fix a pilot flame that is too small or lifting?
A small or lifting flame often indicates a partially clogged orifice or incorrect gas pressure. Replacing the old orifice with a new .012 BASO unit typically restores the required gas flow and flame pattern.

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.