Pentair Flameholder Kit for MasterTemp 300 & Max-E-Therm 333 Heaters | 77707-0203
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- SKU:
- 77707-0203
-
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About This Item
The Pentair Flameholder Kit (77707-0203) is the OEM replacement flameholder assembly for the MasterTemp 300 and Max-E-Therm 333 series pool heaters.
IMPORTANT: KIT CONTENTS — MULTIPLE COMPONENTS INCLUDED
This is a complete kit, not a single component. It includes Item Nos. 10, 11, 12, and 13 along with the flameholder insert, matching Pentair's exploded parts diagram for the Model 300 and 333 heaters.
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 flameholder kit positions and stabilizes the burner flame within the combustion chamber, keeping heat concentrated and directed across the heat exchanger for consistent, efficient operation. A worn or damaged flameholder insert can cause uneven flame patterns, poor combustion, or heat exchanger stress over time, making this kit a targeted fix for those symptoms rather than a full burner tray replacement.
Specifications
| Pentair Part Number | 77707-0203 |
| Part Name | Flameholder Kit - Model 300 |
| Part Category | Flameholder Kits |
| Quantity Included | Each — Kit (Item Nos. 10, 11, 12, 13 & flameholder insert) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair | MasterTemp | 300NA | Flameholder kit for Model 300 heaters; includes flameholder insert |
| Pentair | MasterTemp | 300LP | Flameholder kit for Model 300 heaters; includes flameholder insert |
| Pentair | Max-E-Therm | 333NA | Flameholder Kit for 333 Model (includes items 10, 11, 12, 13 & Flameholder Insert) |
| Pentair | Max-E-Therm | 333LP | Flameholder Kit for 333 Model (includes items 10, 11, 12, 13 & Flameholder Insert) |
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.
Poolaroo Pro Tip
Since the flameholder sits directly in the combustion path, inspect the burner tray and headers for scaling, corrosion, or soot buildup while you have the heater panel open — these components are serviced together, so addressing them in the same visit avoids a second teardown. Gas and electrical heater components must be serviced by a licensed pool professional or qualified HVAC technician.
