Product Overview

The Pentair MasterTemp 300 Natural Gas Heater 460734 is a high-performance pool and spa heater built for fast, dependable residential heating. With 300,000 BTUs of heating power, natural gas operation, and 120/240 VAC electrical capability, this heater is a strong choice for larger residential pools, spas, and pool/spa combination systems that need quick heat-up and consistent temperature control.

The MasterTemp 300 combines a compact equipment pad footprint with digital controls, low NOx performance, quiet operation, and a durable composite cabinet, making it a reliable upgrade or replacement heater for many residential pool systems.

Ideal For

Larger residential swimming pools

Pool and spa combination systems

Natural gas pool heating applications

Homeowners upgrading from an older gas heater

Equipment pads with limited space

Customers wanting faster heat-up than a 250K BTU heater

Residential systems needing a 300K BTU heater

Key Features

300,000 BTU natural gas heating performance

120/240 VAC electrical capability

Compact MasterTemp cabinet design

Digital control panel for easy temperature adjustment

Rotating display for easier viewing and service access

Hot-surface ignition with no standing pilot

Low NOx certified heater design

Quiet operation for residential equipment pads

Rust-resistant composite exterior cabinet

Manual gas shutoff for service convenience

Designed for fast pool and spa warm-up

Compatible with many pool and spa automation systems

Benefits

The Pentair MasterTemp 300 gives pool owners strong heating power in a compact and efficient design. Its 300K BTU rating provides faster heating than smaller 200K and 250K models, making it a good fit for larger pools, attached spas, and customers who want quicker temperature recovery.

The digital control panel makes operation simple, while the low NOx design helps meet modern emissions requirements in many areas. The composite cabinet helps protect against outdoor conditions, and the compact design allows easier installation or replacement on many existing equipment pads.

Specifications

Compatibility & Ordering Notes

Confirm this is the correct natural gas model before ordering.

Verify that 300,000 BTUs is properly sized for the pool or spa application.

Confirm gas line size, gas supply, electrical requirements, plumbing layout, venting requirements, equipment pad clearances, and local code requirements before installation.

This model is not for propane systems. For propane applications, use the correct propane MasterTemp model.

Professional installation is strongly recommended.

Installed or used heaters may not be eligible for return.

Customer-Facing Q&A

Q: Is Pentair 460734 natural gas or propane?
A: Pentair 460734 is the natural gas version of the MasterTemp 300 heater.

Q: How many BTUs is this heater?
A: This heater is rated at 300,000 BTUs.

Q: Can this heater run on 120V or 240V?
A: Yes. This model is designed for 120/240 VAC single-phase operation.

Q: What is the barcode for Pentair 460734?
A: The barcode is 788379724467.

Q: Does this heater use a standing pilot light?
A: No. The MasterTemp 300 uses hot-surface ignition and does not require a standing pilot.

Q: Is this heater good for larger pools?
A: Yes. The 300K BTU size is a strong fit for many larger residential pools and pool/spa systems. Proper sizing depends on pool volume, desired temperature rise, climate, and whether a pool cover is used.

Q: Can this heater connect to automation?
A: Yes. The MasterTemp platform can connect with compatible pool and spa automation systems.

Q: Is professional installation recommended?
A: Yes. Gas pool heaters should be installed by a qualified professional to ensure proper gas, electrical, plumbing, venting, and safety setup.

Q: What should I verify before ordering?
A: Confirm fuel type, BTU sizing, gas line size, electrical requirements, plumbing compatibility, installation clearances, venting requirements, and local code requirements.