Pentair Air Orifice Kit for MasterTemp 250 Pool Heater | 460745
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- SKU:
- 460745
-
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About This Item
The Pentair Air Orifice Kit (460745) is the OEM replacement air orifice assembly for the MasterTemp 250 heater. This kit includes Items 6 and 7 from the MasterTemp 250 exploded diagram and restores correct air-to-fuel mixture calibration in the burner assembly.
⚠️ IMPORTANT: KIT INCLUDES MULTIPLE COMPONENTS
This listing is a kit containing Items 6 and 7 as referenced in the MasterTemp 250 parts diagram — not a single orifice. Confirm both items are needed 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 air orifice controls the precise volume of combustion air entering the burner assembly. A damaged, corroded, or incorrectly sized orifice disrupts the air-to-fuel ratio, leading to incomplete combustion, sooting, ignition failure, or nuisance lockouts. Replacing this kit restores factory burner performance on the MasterTemp 250 natural gas and propane models.
Specifications
| Pentair Part Number | 460745 |
| Part Name | Air Orifice Kit — Model 250 |
| Kit Contents | Includes Item Nos. 6 and 7 (per MasterTemp 250 parts diagram) |
| Quantity Included | 1 Kit |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | MasterTemp 250NA — MasterTemp Series | 250NA | Air Orifice Kit for Model 250 |
| Pentair | MasterTemp 250LP — MasterTemp Series | 250LP | Air Orifice Kit for Model 250 |
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
The MasterTemp 250 is available in natural gas (250NA) and liquid propane (250LP) configurations — confirm your heater's fuel type before ordering. Air orifice sizing differs between gas types, and installing the wrong orifice will result in improper combustion. The model designation is printed on the heater's rating label, typically located on the front door panel or inside the equipment compartment.
