Pentair MasterTemp® Liquid Propane High Performance Heater 300K BTU
The Pentair MasterTemp® Liquid Propane High Performance Heater 300K BTU offers all the efficiency, convenience, and reliability features you want in a pool heater — plus a lot more. As easy to use as your home heating system, with user-friendly indicator lights that make system operation and monitoring a snap. The compact design and super-quiet operation won't intrude on your poolside leisure time.
Built by Pentair with a rotating digital display, rustproof exterior, Low NOx certification, optional Smart Bypass Valve Kit, and manual gas shut-off. LP fuel for locations without natural gas access. CSA certified. Backed by a 2-year warranty.
⚠️ Professional Installation Required. Pool heater installation involves propane gas line connections and electrical wiring. Always use a licensed contractor to ensure safety, code compliance, and warranty validity.
Key Features
300,000 BTU Liquid Propane
Upper mid-range LP heating — between 250K and 400K in the MasterTemp lineup.
Best-in-Class Energy Efficiency
Green certified — outperforms industry efficiency standards. Heats up fast so no long waits.
Rotating Digital Display
Easy-to-read rotating display allows viewing from multiple angles.
Smart Bypass Valve Kit Compatible
Optional energy-saving Smart Bypass Valve Kit available for maximum efficiency.
Manual Gas Shut-Off
Convenient manual gas shut-off when service is required.
Low NOx Certified
Eco-friendly — certified for low NOx emissions, outperforms industry standards.
Tough, Rustproof Exterior
Handles the heat and weathers the elements for long service life.
CSA Certified
Meets North American safety standards for gas-fired pool heaters.
2-Year Warranty
Pentair residential warranty coverage.
Who It's For
- Pool and spa owners without natural gas whose heat load falls between 250K and 400K BTU
- Anyone who wants the MasterTemp 300K platform in liquid propane
- Indoor and outdoor installations requiring upper mid-range LP capacity
- Anyone who wants Smart Bypass Valve Kit compatibility for maximum energy savings
Specifications
Heating Performance
| BTU Input | 300,000 BTU |
| Fuel Type | Liquid Propane |
| Emissions | Low NOx |
| Max Flow Rate | 120 GPM |
Construction
| Control Type | Digital (Rotating Display) |
| Exterior | Rustproof |
Installation
| Gas Connection | 0.75 in |
| Voltage | 120V / 240V |
| Frequency | 60 Hz |
| Phase | Single |
| Application | Indoor / Outdoor / Pool / Spa |
Physical
| Product Weight | 136 lb |
| Cabinet Dimensions | 23 W × 28.2 D × 21 H in |
| Shipping Dimensions | 36 × 25 × 30 in |
Approvals & Warranty
| Certifications | CSA Certified |
| Energy Efficient | Yes (Green Certified) |
| Warranty | 2 Years |
What's in the Box
- Pentair MasterTemp 300K BTU Liquid Propane Heater
- Union Fittings
- User Manual
Warranty
The MasterTemp 300K BTU LP comes with a 2-year manufacturer warranty from Pentair. Clearflow Pool Supply is an authorized Pentair dealer and will assist with any warranty service needed.
Downloads
Frequently Asked Questions
What is the difference between this (460735) and the natural gas 300K model (460734)?
The 460735 runs on liquid propane and the 460734 runs on natural gas. All performance specifications — BTU output, digital display, and 2-year warranty — are identical. Choose the LP model if you don't have natural gas service at your property.
Does this heater require professional installation?
Yes. Propane heater installation involves connecting to a propane supply line, electrical wiring, and proper venting. A licensed pool contractor or plumber must perform the installation to ensure safety, local code compliance, and warranty validity.
What is the Smart Bypass Valve Kit?
The optional Smart Bypass Valve Kit diverts flow around the heater when it's not actively heating, reducing hydraulic resistance and lowering pump energy consumption. It's available as an add-on for maximum energy efficiency.
What size pool is the 300K BTU suitable for?
As a general guideline, 300,000 BTU is typically suited for pools in the 25,000–40,000 gallon range depending on climate, desired temperature rise, and heat loss factors. A licensed pool professional can calculate the correct BTU requirement for your specific pool and location.