Pentair Natural Gas to Propane Conversion Kit 333 | Max-E-Therm 333NA | 77707-1451
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- SKU:
- 77707-1451
-
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About This Item
The Pentair Natural Gas to Propane Conversion Kit (77707-1451) is the OEM replacement conversion kit for the Pentair (formerly Sta-Rite) Max-E-Therm 333 Natural Gas pool heater. This kit is not included with the heater and must be ordered separately when converting the unit from natural gas to propane operation.
⚠️ IMPORTANT: KIT LISTING — INCLUDES ITEMS 3 & 4
This listing is a kit, not a single component. It includes items 3 and 4 as identified in the Max-E-Therm 333 exploded parts diagram. Confirm both items are required for your conversion 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.
This conversion kit reconfigures the Max-E-Therm 333 heater's gas train from natural gas to liquid propane (LP) operation. Converting a natural gas heater to propane requires replacing the orifice and regulator components to accommodate propane's different pressure and combustion characteristics — this kit supplies the OEM-matched components for that conversion on the 333 model specifically.
Specifications
| Pentair Part Number | 77707-1451 |
| Part Category | Conversion Kit |
| Conversion Type | Natural Gas (NG) to Liquid Propane (LP) |
| Quantity Included | Kit (includes items 3 & 4) |
Fits Into
| Brand | Equipment Line | Model / Part Number | Notes |
| Pentair (formerly Sta-Rite) | Max-E-Therm 333 Natural Gas | 333NA | NG to Propane Conversion Kit for 333 Model. 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
This kit is model-size specific — the 333 conversion kit is not interchangeable with kits for other BTU-rated Max-E-Therm models. Before ordering, confirm the model designation stamped on your heater's data plate matches the 333 model. If you are unsure which items 3 and 4 correspond to in your unit's parts diagram, consult the Max-E-Therm installation and service manual or contact a licensed pool heating technician before disassembly.
