Copeland Comfort Control (White Rodgers) 37C72U-185 Valve

The Copeland Comfort Control (White Rodgers) 37C72U-185 Gas Control Valve is a specialized water heater thermostat engineered specifically for liquid propane (LP) gas applications. This direct replacement gas valve features a 1/2" NPT inlet and a 1/2" inverted flare outlet with a left hand thread, ensuring a secure, leak-free connection in residential water heating systems. For precise manifold pressure, the internal regulator is factory-set to 10.0" W.C., providing consistent flow to both the main burner and the 1/4" compression pilot port. With a 4.5" immersion length and a 1-1/4" shank, this LP gas control valve is built for standard tank installations. For system safety, it incorporates a single cycle E.C.O. (Energy Cut-Off) designed to interrupt gas flow if water temperatures exceed 195°F. This unit is an essential HVACR replacement part for technicians needing to restore reliable temperature regulation and pilot safety to LP-fired units.

• Application Specific: Pre-configured for LP gas only, eliminating the need for field conversion kits.
• Precise Regulation: Reliable 10.0" W.C. gas pressure regulator ensures optimal burner efficiency and clean combustion.
• Mechanical Safety: Integrated Energy Cut-Off (E.C.O.) provides a redundant thermal safety layer at 195°F.
• Standardized Fit: 4-1/2" insertion depth and 3/4" NPT mounting thread accommodate most high-capacity residential tanks.
• Durable Construction: Built by White Rodgers to withstand the high-demand cycles of domestic hot water systems.

Can this valve be used with Natural Gas?
No, the 37C72U-185 is strictly for LP gas. Using it with natural gas will result in improper pressure and hazardous operating conditions.

What is the purpose of the Left Hand Thread outlet?
The 1/2" inverted flare left hand thread is a safety design used in specific LP gas water heater configurations to ensure only compatible fittings are connected to the propane supply line.

Is the pilot regulator adjustable?
This model features a fully regulated fixed pilot which simplifies the installation process by maintaining the correct flame height without manual field adjustment.

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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.