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Pentair MasterTemp® 125 Heater with Cord 125K BTU Natural Gas

by Pentair
$2,472.27

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

The Pentair MasterTemp® 125 Heater with Cord 125K BTU Natural Gas provides energy savings and advanced operating features that were only available from much larger heaters. With revolutionary pre-mixed gas combustion technology delivering 82% thermal efficiency — the highest in its class — and an advanced LCD display/controller for more information and better control.

Built by Pentair with a compact, lightweight design and 120V power cord included for straightforward installation. Suitable for above-ground pools, spas, and in-ground pools up to 15,000 gallons. Backed by a 1-year warranty.

⚠️ Professional Installation Required. Pool heater installation involves gas line connections. Always use a licensed contractor to ensure safety, code compliance, and warranty validity.

Key Features

125,000 BTU — 82% Efficiency

Highest efficiency in the 125K BTU class via pre-mixed gas combustion technology.

Advanced LCD Display/Controller

More information and better control than standard digital displays — easy to read and operate.

Pre-Mixed Gas Combustion

Revolutionary combustion technology for maximum efficiency in a compact heater.

Power Cord Included

120V cord included — plug-in electrical connection, no hardwiring required.

Compact, Lightweight Design

Easy to install — reduces labor costs and fits smaller equipment pads.

Indoor and Outdoor Rated

Suitable for both indoor and outdoor pool and spa installations.

Above-Ground and Small In-Ground Pools

Designed for above-ground pools, spas, and in-ground pools up to 15,000 gallons.

1-Year Warranty

Pentair parts warranty coverage.

Who It's For

  • Above-ground pool owners wanting a compact NG heater with advanced LCD controls and cord
  • Spa owners needing purpose-sized heating with plug-in connection
  • In-ground pool owners with pools up to 15,000 gallons wanting LCD display control
  • Installations where an LCD controller is preferred over a rotating digital display

Specifications

Heating Performance

BTU Input 125,000 BTU
Thermal Efficiency 82%
Fuel Type Natural Gas
Combustion Technology Pre-Mixed Gas

Construction

Control Type Advanced LCD Display/Controller

Installation

Electrical Connection 120V Cord Included
Frequency 60 Hz
Application Indoor / Outdoor / Pool / Spa

Physical

Product Weight 100 lb
Cabinet Dimensions 21 W × 23 D × 21 H in
Shipping Dimensions 36 × 22.5 × 25 in

Approvals & Warranty

Warranty 1 Year Parts

What's in the Box

  • Pentair MasterTemp 125 Natural Gas Heater
  • Power Cord
  • Union Fittings
  • User Manual

Warranty

The MasterTemp 125 with Cord NG (EC-462024) comes with a 1-year parts manufacturer warranty from Pentair. Clearflow Pool Supply is an authorized Pentair dealer and will assist with any warranty service needed.

Downloads

Frequently Asked Questions

How does this compare to the other MasterTemp 125K NG models (461058, 461059)?

All three are 125K BTU MasterTemp natural gas heaters with pre-mixed combustion and 82% efficiency. The EC-462024 features an advanced LCD display/controller and a 1-year warranty. The 461059 has a rotating digital display and 2-year warranty with cord. The 461058 has a rotating digital display and 2-year warranty with hardwire connection. Choose the EC-462024 for the LCD controller; choose 461058 or 461059 for the longer 2-year warranty.

Is this suitable for above-ground pools?

Yes. The MasterTemp 125 is specifically designed for above-ground pools, spas, and in-ground pools up to 15,000 gallons.

Does it require professional installation?

Yes. A licensed contractor should handle the natural gas line connection and proper venting. The power cord allows straightforward electrical connection without hardwiring, but the gas connection and venting must be done professionally.

What is pre-mixed gas combustion technology?

Pre-mixed combustion blends gas and air before ignition for a more complete, efficient burn — enabling the MasterTemp 125 to achieve 82% thermal efficiency, the highest in the 125K BTU class.

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

The Pentair MasterTemp® 125 Heater with Cord 125K BTU Natural Gas provides energy savings and advanced operating features that were only available from much larger heaters. With revolutionary pre-mixed gas combustion technology delivering 82% thermal efficiency — the highest in its class — and an advanced LCD display/controller for more information and better control.

Built by Pentair with a compact, lightweight design and 120V power cord included for straightforward installation. Suitable for above-ground pools, spas, and in-ground pools up to 15,000 gallons. Backed by a 1-year warranty.

⚠️ Professional Installation Required. Pool heater installation involves gas line connections. Always use a licensed contractor to ensure safety, code compliance, and warranty validity.

Key Features

125,000 BTU — 82% Efficiency

Highest efficiency in the 125K BTU class via pre-mixed gas combustion technology.

Advanced LCD Display/Controller

More information and better control than standard digital displays — easy to read and operate.

Pre-Mixed Gas Combustion

Revolutionary combustion technology for maximum efficiency in a compact heater.

Power Cord Included

120V cord included — plug-in electrical connection, no hardwiring required.

Compact, Lightweight Design

Easy to install — reduces labor costs and fits smaller equipment pads.

Indoor and Outdoor Rated

Suitable for both indoor and outdoor pool and spa installations.

Above-Ground and Small In-Ground Pools

Designed for above-ground pools, spas, and in-ground pools up to 15,000 gallons.

1-Year Warranty

Pentair parts warranty coverage.

Who It's For

  • Above-ground pool owners wanting a compact NG heater with advanced LCD controls and cord
  • Spa owners needing purpose-sized heating with plug-in connection
  • In-ground pool owners with pools up to 15,000 gallons wanting LCD display control
  • Installations where an LCD controller is preferred over a rotating digital display

Specifications

Heating Performance

BTU Input 125,000 BTU
Thermal Efficiency 82%
Fuel Type Natural Gas
Combustion Technology Pre-Mixed Gas

Construction

Control Type Advanced LCD Display/Controller

Installation

Electrical Connection 120V Cord Included
Frequency 60 Hz
Application Indoor / Outdoor / Pool / Spa

Physical

Product Weight 100 lb
Cabinet Dimensions 21 W × 23 D × 21 H in
Shipping Dimensions 36 × 22.5 × 25 in

Approvals & Warranty

Warranty 1 Year Parts

What's in the Box

  • Pentair MasterTemp 125 Natural Gas Heater
  • Power Cord
  • Union Fittings
  • User Manual

Warranty

The MasterTemp 125 with Cord NG (EC-462024) comes with a 1-year parts manufacturer warranty from Pentair. Clearflow Pool Supply is an authorized Pentair dealer and will assist with any warranty service needed.

Downloads

Frequently Asked Questions

How does this compare to the other MasterTemp 125K NG models (461058, 461059)?

All three are 125K BTU MasterTemp natural gas heaters with pre-mixed combustion and 82% efficiency. The EC-462024 features an advanced LCD display/controller and a 1-year warranty. The 461059 has a rotating digital display and 2-year warranty with cord. The 461058 has a rotating digital display and 2-year warranty with hardwire connection. Choose the EC-462024 for the LCD controller; choose 461058 or 461059 for the longer 2-year warranty.

Is this suitable for above-ground pools?

Yes. The MasterTemp 125 is specifically designed for above-ground pools, spas, and in-ground pools up to 15,000 gallons.

Does it require professional installation?

Yes. A licensed contractor should handle the natural gas line connection and proper venting. The power cord allows straightforward electrical connection without hardwiring, but the gas connection and venting must be done professionally.

What is pre-mixed gas combustion technology?

Pre-mixed combustion blends gas and air before ignition for a more complete, efficient burn — enabling the MasterTemp 125 to achieve 82% thermal efficiency, the highest in the 125K BTU class.

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® 125 Heater with Cord 125K BTU Natural Gas provides energy savings and advanced operating features that were only available from much larger heaters. With revolutionary pre-mixed gas combustion technology delivering 82% thermal efficiency — the highest in its class — and an advanced LCD display/controller for more information and better control.

Built by Pentair with a compact, lightweight design and 120V power cord included for straightforward installation. Suitable for above-ground pools, spas, and in-ground pools up to 15,000 gallons. Backed by a 1-year warranty.

⚠️ Professional Installation Required. Pool heater installation involves gas line connections. Always use a licensed contractor to ensure safety, code compliance, and warranty validity.

Key Features

125,000 BTU — 82% Efficiency

Highest efficiency in the 125K BTU class via pre-mixed gas combustion technology.

Advanced LCD Display/Controller

More information and better control than standard digital displays — easy to read and operate.

Pre-Mixed Gas Combustion

Revolutionary combustion technology for maximum efficiency in a compact heater.

Power Cord Included

120V cord included — plug-in electrical connection, no hardwiring required.

Compact, Lightweight Design

Easy to install — reduces labor costs and fits smaller equipment pads.

Indoor and Outdoor Rated

Suitable for both indoor and outdoor pool and spa installations.

Above-Ground and Small In-Ground Pools

Designed for above-ground pools, spas, and in-ground pools up to 15,000 gallons.

1-Year Warranty

Pentair parts warranty coverage.

Who It's For

  • Above-ground pool owners wanting a compact NG heater with advanced LCD controls and cord
  • Spa owners needing purpose-sized heating with plug-in connection
  • In-ground pool owners with pools up to 15,000 gallons wanting LCD display control
  • Installations where an LCD controller is preferred over a rotating digital display

Specifications

Heating Performance

BTU Input 125,000 BTU
Thermal Efficiency 82%
Fuel Type Natural Gas
Combustion Technology Pre-Mixed Gas

Construction

Control Type Advanced LCD Display/Controller

Installation

Electrical Connection 120V Cord Included
Frequency 60 Hz
Application Indoor / Outdoor / Pool / Spa

Physical

Product Weight 100 lb
Cabinet Dimensions 21 W × 23 D × 21 H in
Shipping Dimensions 36 × 22.5 × 25 in

Approvals & Warranty

Warranty 1 Year Parts

What's in the Box

  • Pentair MasterTemp 125 Natural Gas Heater
  • Power Cord
  • Union Fittings
  • User Manual

Warranty

The MasterTemp 125 with Cord NG (EC-462024) comes with a 1-year parts manufacturer warranty from Pentair. Clearflow Pool Supply is an authorized Pentair dealer and will assist with any warranty service needed.

Downloads

Frequently Asked Questions

How does this compare to the other MasterTemp 125K NG models (461058, 461059)?

All three are 125K BTU MasterTemp natural gas heaters with pre-mixed combustion and 82% efficiency. The EC-462024 features an advanced LCD display/controller and a 1-year warranty. The 461059 has a rotating digital display and 2-year warranty with cord. The 461058 has a rotating digital display and 2-year warranty with hardwire connection. Choose the EC-462024 for the LCD controller; choose 461058 or 461059 for the longer 2-year warranty.

Is this suitable for above-ground pools?

Yes. The MasterTemp 125 is specifically designed for above-ground pools, spas, and in-ground pools up to 15,000 gallons.

Does it require professional installation?

Yes. A licensed contractor should handle the natural gas line connection and proper venting. The power cord allows straightforward electrical connection without hardwiring, but the gas connection and venting must be done professionally.

What is pre-mixed gas combustion technology?

Pre-mixed combustion blends gas and air before ignition for a more complete, efficient burn — enabling the MasterTemp 125 to achieve 82% thermal efficiency, the highest in the 125K BTU class.

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.