Pentair MasterTemp 125 Tubesheet Coil Assembly | MasterTemp Heater | 474971
Pentair Pool Products and Parts

Pentair MasterTemp 125 Tubesheet Coil Assembly | MasterTemp Heater | 474971

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SKU:
474971

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About This Item

MasterTemp 125 Tubesheet Coil Assembly

The Pentair MasterTemp 125 Tubesheet Coil Assembly (474971) is the OEM replacement heat exchanger core for the MasterTemp 125 low-NOx gas heater.

⚠️ IMPORTANT: HEATER COMPONENT — PROFESSIONAL SERVICE 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.

⚠️ IMPORTANT: VERIFY FITMENT BEFORE ORDERING
Neither the Pentair 2025–2026 parts catalog nor compatibility records for part number 474971 are available in the current database extract. Confirm this part number against your MasterTemp 125 heater's installation manual or the original component before ordering.

The tubesheet coil assembly is the primary heat transfer component inside the MasterTemp 125 heater. Pool water circulates through the coil tubes while combustion gases pass over the external tube surface, transferring heat into the water stream. When the coil develops a leak or suffers corrosion damage, water can enter the combustion chamber and contaminate the heat exchanger cavity — replacing the full tubesheet coil assembly restores the sealed heat transfer pathway and protects the surrounding heater components.

Specifications

Pentair Part Number 474971

Pro Tip

Before ordering, locate the part number stamped or labeled on the existing coil assembly inside your MasterTemp 125 heater and confirm it matches 474971. MasterTemp heaters are available in multiple BTU ratings — coil assemblies are not interchangeable across models. If your heater's data plate does not confirm the 125 BTU rating, verify the correct part number in your heater's installation manual before proceeding.

CALIFORNIA PROPOSITION 65 WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.
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Pentair Pool Products and Parts

About Pentair Pool Products and Parts

Pentair is often considered the "gold standard" for pool professionals, and for good reason. Founded in 1966 (originally by five inventors making high-altitude balloons!), the company has evolved into the global leader in smart, sustainable water solutions. For the DIY homeowner, Pentair represents the intersection of rugged durability and silicon valley-tier technology. They pioneered the Variable Speed Pump revolution with the IntelliFlo®, saving American pool owners millions in energy costs. Today, their ecosystem focuses heavily on automation, allowing you to control your pump, heater, lights, and chemistry from a single app. While they are a favorite among professional builders, their "EC" (E-Commerce) line of equipment allows homeowners to access pro-grade technology with valid warranties for DIY installation.

Why We Trust Pentair Pool Products and Parts
Energy Efficiency Leaders: Recipient of the ENERGY STAR® Partner of the Year award for over a decade; their pumps are designed to pay for themselves in energy savings.

Smart Automation: The Pentair Home App and IntelliCenter systems offer best-in-class control over your pool ecosystem from anywhere in the world.

Professional Pedigree: The brand most often recommended and installed by pool builders for high-end residential pools.

Eco-Conscious: Dedicated to reducing water waste and energy consumption through "Green" technology innovations.

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