Raypak 004881F Gas Valve

The Raypak 004881F Gas Valve is an essential genuine OEM replacement part engineered for high-output 2-stage natural gas heating systems. As a critical component for Raypak boiler repair and water heater maintenance, this valve features a 1-inch inlet/outlet and is pre-set for a 4-inch water column to ensure precise fuel regulation and manifold pressure. Operating on a standard 24V transformer circuit, the 004881F is built to handle the rigors of both residential and commercial HVAC gas valve replacement tasks.

This negative pressure regulated gas valve provides reliable ignition and combustion stability for Raypak Hi Delta and MVB series equipment. By utilizing authentic Raypak heater parts, contractors ensure direct compatibility with existing wire harnesses and mounting configurations, preventing the manifold leaks and staging failures often associated with universal aftermarket alternatives. This 004881F assembly is shipped in original factory packaging to maintain component integrity from the warehouse to the job site.

Technical Highlights

• Direct OEM Replacement: Ensures precise fitment and factory-spec performance for Raypak 2-stage heaters.
• Heavy-Duty Construction: Features a robust 1-inch NPT connection and dual-stage solenoid for variable heat demand.
• Precise Pressure Regulation: Calibrated for natural gas (NG) at a 4" WC setpoint for efficient BTU output.
• System Safety: Integrated 24V control logic provides rapid shut-off and stable pilot/main burner sequencing.

Common Contractor Questions

Is the Raypak 004881F compatible with Propane (LP) systems?
No, this specific model is calibrated for Natural Gas applications. Converting this valve requires a manufacturer-approved LP conversion kit; always verify your specific model's rating plate before installation.

Can I use a 3/4-inch reducer with this gas valve?
While bushings are physically possible, reducing the 1-inch gas port may restrict fuel flow and impact the Raypak boiler's ability to reach its rated BTU capacity. It is recommended to maintain the designed piping diameter for 2-stage regulation.

What are the signs of a failing 004881F valve?
Common indicators include failure to transition to the second stage of heating, intermittent "no flame" codes on the ignition module, or audible solenoid humming without gas release.

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.