Pentair Gas Orifice Kit – NG, Model 250 for MasterTemp | 460739
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- SKU:
- 460739
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About This Item
OEM Gas Orifice Kit for the Pentair MasterTemp 250NA Natural Gas Heater
The Pentair Gas Orifice Kit – NG, Model 250 (460739) is the OEM replacement orifice kit for the MasterTemp 250NA natural gas heater. This kit supplies the correct orifice sizing for natural gas combustion in the MasterTemp 250 platform.
⚠️ IMPORTANT: KIT CONTENTS
This listing is a kit, not a single orifice. It includes orifice and o-ring as referenced in the MasterTemp 250NA exploded parts diagram. Confirm which items are required for your service before ordering.
⚠️ IMPORTANT: LICENSED PROFESSIONAL INSTALLATION REQUIRED
Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician. Do not attempt to service gas or high-voltage components without proper certification.
The gas orifice controls the flow rate and pressure of natural gas delivered to each burner. Correct orifice sizing is critical to combustion efficiency, heater output, and safe operation. This kit is not included with the heater at time of purchase and must be ordered separately when replacement is required. Use only the natural gas (NG) version — this kit is not interchangeable with the LP (propane) orifice kit for the same model.
Specifications
| Pentair Part Number | 460739 |
| Part Name | Gas Orifice Kit – NG, Model 250 |
| Fuel Type | Natural Gas (NG) |
| Kit Contents | Includes brass orifice and o-ring (per MasterTemp 250NA parts diagram) |
| Quantity Included | Kit (Each) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | MasterTemp — MasterTemp Series | 250NA | Natural gas orifice kit for Model 250; not included with heater — order separately |
Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.
Pro Tip
Natural gas and LP (propane) orifice kits are not interchangeable — they are sized differently for each fuel type and will cause incorrect combustion, unsafe operation, or heater lockout if mismatched. Before ordering, confirm your heater's fuel type on the rating label located on the heater cabinet. If you are converting fuel types, consult the MasterTemp conversion documentation and contact a licensed technician — a gas orifice swap alone does not constitute a complete fuel conversion.
