beige molded heater top with cut-out section and four screws with washers placed on top against white background
Pentair Pool Products and Parts

Pentair Heater Top | MasterTemp 125 | 42002-0034Z

$370.99
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SKU:
42002-0034z

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About This Item

The Pentair Heater Top (42002-0034Z) is the OEM replacement enclosure panel for the Pentair MasterTemp 125 pool and spa heater.

IMPORTANT: LICENSED PROFESSIONAL INSTALLATION 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.

The molded heater top serves as the upper enclosure panel for the MasterTemp 125 burner system, protecting internal heater components from the elements and maintaining the unit's structural housing integrity. Replacement is required when the existing top panel is cracked, warped, or damaged.

Specifications

Pentair Part Number 42002-0034Z
Part Name Heater Top
Part Category Enclosure Panels
Quantity Included Each (1)

Fits Into

Brand Equipment Line Model / Part Number Notes
Pentair MasterTemp MT125 MasterTemp 125 Heater
Pentair MasterTemp MasterTemp125 MasterTemp 125 Heater — Heater Top

Compatibility is based on Pentair parts documentation and available OEM records. This is not an exhaustive list. For certainty, verify the part number in your equipment's manual or on the original part itself before ordering.

Poolaroo Pro Tip

Before removing the existing heater top, power down and isolate the heater completely — both gas supply and electrical. The MasterTemp 125 enclosure panels are retention-clipped and fastened; have a licensed pool or HVAC technician perform this replacement to ensure the housing seals correctly and no internal components are disturbed during panel removal.

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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