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Pentair MasterTemp® Liquid Propane High Performance Heater 300K BTU

by Pentair
$4,629.00

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✓ Authorized Dealer
✓ Free Shipping
✓ Manufacturer Warranty
✓ Expert Support

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.

Description
✓ Authorized Dealer ✓ Free Shipping ✓ Manufacturer Warranty ✓ Expert Support

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.

Shipping

Shipping Policy

At ClearFlow Pool Supply, we keep things simple.

👉 Free shipping on all orders within the United States.
No hidden fees. No surprises.


Order Confirmation

As soon as you place your order, you’ll receive an order confirmation email.

This means:

  • we’ve received your order
  • your payment method has been pre-authorized

Once your order is in our system, we verify:

  • product availability
  • inventory status with our suppliers

If an item is unavailable or backordered, we will:

  • void the pre-authorization
  • contact you promptly to discuss alternatives

If your item is in stock and ready to ship (typically within 3–5 business days), your order will be processed and prepared for shipment.


Order Shipment

Orders that are in stock will typically ship within 3 business days.

You will receive a shipping confirmation email with tracking details within 24 hours of your order leaving the warehouse.

If you do not receive tracking information within 4 business days, please contact us at:

👉 support@clearflowpoolsupply.com 


Shipping Scope

We currently ship to customers within the United States.

Due to the size and nature of many pool equipment products, some orders may ship via freight carriers. Delivery times may vary depending on location and product availability.


International Orders

At this time, our products are designed and configured for the U.S. market, operating on 110V electrical systems and meeting U.S. safety standards.

We may be able to accommodate international orders on a case-by-case basis.
If you are located outside the United States, please contact us to request a custom shipping quote.


Damaged Shipments

Please inspect your order upon delivery.

If you notice any damage:

  • note it with the carrier before signing
  • or refuse the delivery if damage is severe

If you accept the delivery:

👉 Take clear photos of:

  • the packaging
  • the damaged product

Then email us immediately at:

👉 support@clearflowpoolsupply.com

We will work with you quickly to resolve the issue.


Returns

For full details on returns, please visit our Returns Policy page.

Why Buy from Us

Why Buy From Us

We understand—you have options when it comes to buying pool equipment online.

At ClearFlow Pool Supply, our goal is simple:

👉 provide reliable products
👉 offer a straightforward buying experience
👉 and support you every step of the way

Here’s what sets us apart.


Free Shipping Across the U.S.

No hidden fees. No surprises.

All orders ship free within the United States, including large and heavy equipment.


Competitive Pricing

We work to offer strong, competitive pricing across our entire catalog.

If you find the same product available online at a lower total price, feel free to reach out—we’re happy to review it.


30-Day Return Policy

If your product isn’t the right fit, we offer a 30-day return window.

We aim to make the process as simple and straightforward as possible.
(See our Returns Policy for full details.)


Reliable Equipment

We focus on products that matter:

  • durable
  • proven
  • built for long-term use

Our goal is to help you avoid the frustration of unreliable or low-quality equipment.


Customer-Focused Support

We’re here to help before and after your purchase.

Whether you’re:

  • replacing a component
  • upgrading your system
  • or choosing equipment for the first time

👉 we’re here to make the process easier


Our Commitment

We stand behind what we sell.

If something isn’t right, we’ll work with you to resolve it quickly and fairly.


Price Match Policy

If you find the same product offered at a lower total price (including shipping), contact us at:

👉 support@clearflowpoolsupply.com

We’ll review the offer and do our best to match it.

Description
✓ Authorized Dealer ✓ Free Shipping ✓ Manufacturer Warranty ✓ Expert Support

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.

Shipping

Shipping Policy

At ClearFlow Pool Supply, we keep things simple.

👉 Free shipping on all orders within the United States.
No hidden fees. No surprises.


Order Confirmation

As soon as you place your order, you’ll receive an order confirmation email.

This means:

  • we’ve received your order
  • your payment method has been pre-authorized

Once your order is in our system, we verify:

  • product availability
  • inventory status with our suppliers

If an item is unavailable or backordered, we will:

  • void the pre-authorization
  • contact you promptly to discuss alternatives

If your item is in stock and ready to ship (typically within 3–5 business days), your order will be processed and prepared for shipment.


Order Shipment

Orders that are in stock will typically ship within 3 business days.

You will receive a shipping confirmation email with tracking details within 24 hours of your order leaving the warehouse.

If you do not receive tracking information within 4 business days, please contact us at:

👉 support@clearflowpoolsupply.com 


Shipping Scope

We currently ship to customers within the United States.

Due to the size and nature of many pool equipment products, some orders may ship via freight carriers. Delivery times may vary depending on location and product availability.


International Orders

At this time, our products are designed and configured for the U.S. market, operating on 110V electrical systems and meeting U.S. safety standards.

We may be able to accommodate international orders on a case-by-case basis.
If you are located outside the United States, please contact us to request a custom shipping quote.


Damaged Shipments

Please inspect your order upon delivery.

If you notice any damage:

  • note it with the carrier before signing
  • or refuse the delivery if damage is severe

If you accept the delivery:

👉 Take clear photos of:

  • the packaging
  • the damaged product

Then email us immediately at:

👉 support@clearflowpoolsupply.com

We will work with you quickly to resolve the issue.


Returns

For full details on returns, please visit our Returns Policy page.

Why Buy from Us

Why Buy From Us

We understand—you have options when it comes to buying pool equipment online.

At ClearFlow Pool Supply, our goal is simple:

👉 provide reliable products
👉 offer a straightforward buying experience
👉 and support you every step of the way

Here’s what sets us apart.


Free Shipping Across the U.S.

No hidden fees. No surprises.

All orders ship free within the United States, including large and heavy equipment.


Competitive Pricing

We work to offer strong, competitive pricing across our entire catalog.

If you find the same product available online at a lower total price, feel free to reach out—we’re happy to review it.


30-Day Return Policy

If your product isn’t the right fit, we offer a 30-day return window.

We aim to make the process as simple and straightforward as possible.
(See our Returns Policy for full details.)


Reliable Equipment

We focus on products that matter:

  • durable
  • proven
  • built for long-term use

Our goal is to help you avoid the frustration of unreliable or low-quality equipment.


Customer-Focused Support

We’re here to help before and after your purchase.

Whether you’re:

  • replacing a component
  • upgrading your system
  • or choosing equipment for the first time

👉 we’re here to make the process easier


Our Commitment

We stand behind what we sell.

If something isn’t right, we’ll work with you to resolve it quickly and fairly.


Price Match Policy

If you find the same product offered at a lower total price (including shipping), contact us at:

👉 support@clearflowpoolsupply.com

We’ll review the offer and do our best to match it.