The Dometic #56 LP Gas Orifice (Part# 31083) is a precision-engineered burner component designed specifically for Atwood Hydro Flame furnaces. This critical orifice controls the flow of LP gas to your furnace burner, ensuring proper combustion and efficient heating performance. If your RV furnace is experiencing inconsistent heating, yellow flames, or won't ignite properly, a worn or incorrect orifice may be the culprit.
Key Features
- Genuine Dometic OEM Part: Factory-specified component ensures proper fit and performance
- #56 Drill Size: Precision-calibrated orifice for accurate LP gas flow control
- Atwood Hydro Flame Compatible: Designed specifically for Atwood/Hydro Flame furnace systems
- Brass Construction: Durable material resists corrosion and maintains precise tolerances
- Direct Replacement: Installs in place of worn or damaged original orifice
- Critical Safety Component: Ensures proper gas-to-air mixture for safe furnace operation
Technical Specifications
| Part Number | 31083 |
| Orifice Size | #56 Drill Size |
| Material | Brass |
| Fuel Type | LP Gas (Propane) |
| Application | Furnace Burner |
| Brand Compatibility | Atwood / Hydro Flame |
Frequently Asked Questions
Signs of a faulty orifice include yellow or orange flames (should be blue), sooting around the burner, inconsistent heating, furnace cycling on and off frequently, or difficulty igniting. If you've recently had LP gas work done or your furnace performance has changed, the orifice may need replacement.
No. The #56 orifice is precision-calibrated for specific Atwood Hydro Flame furnace models. Using an incorrect size will result in improper gas flow, potentially causing dangerous conditions, poor heating performance, or furnace damage. Always use the exact orifice size specified for your furnace model.
This #56 orifice is designed specifically for LP gas (propane) systems. Natural gas requires different orifice sizes due to different fuel characteristics. Never attempt to use an LP orifice with natural gas or vice versa.
While mechanically inclined RV owners can replace an orifice, LP gas system work requires careful attention to safety. You must ensure proper torque, check for leaks with soapy water, and verify proper flame characteristics after installation. If you're not comfortable working with LP gas systems, have a certified RV technician perform the installation.
Why Choose Elkhart RV Parts?
At ElkhartRVParts.com, we specialize in hard-to-find Dometic and Atwood replacement parts that keep your RV systems running reliably. Located in Elkhart, Indiana — the RV Capital of the World — we understand the importance of getting the right part quickly. We stock genuine OEM components like this #56 LP gas orifice, ensuring you receive factory-quality parts backed by expert support. Our team knows Atwood Hydro Flame furnaces inside and out, and we're here to help you identify the exact part you need for a successful repair.
| Brand | Dometic |
|---|---|
| Product type | LP Gas Orifice |
| Part number | 31083 |
| Orifice size | #56 |
| Application | Furnace Burner |
| Furnace brand | Atwood Hydro Flame |
| Compatible models | 8910-II8920-II |
| Part category | OEM Replacement |
| Function | Fuel flow regulator for burner assembly |
| Condition | New |
| Product class | Service Part |
Factory-Fresh OEM Parts — the same brands installed in new RVs straight from Elkhart. Genuine, name-brand components made to order — never generic, never outdated. Sourced directly from the original RV manufacturers for perfect fit and factory-level quality.