Swimmables | SW-41-007 | Thermal Regulator – Replacement for 38000‑0007S MasterTemp / Max‑E‑Therm

Ensure consistent heater performance with the Swimables SW‑41‑007 thermal regulator—OEM-style replacement for Pentair part 38000‑0007S. Durable brass body with spring clip, easy to install, helps maintain stable water temperature and protect your heater.

Key Features

• OEM Cross-Reference 38000‑0007S – Fits MasterTemp and Max‑E‑Therm series as direct replacement for Pentair thermal regulator 

• Reliable Temperature Control – Accurately regulates internal bypass flow to maintain correct outlet temperature and prevent overheating 

• Robust Construction – Includes durable thermal body and factory-supplied spring clip for secure installation

• Easy Drop-In Installation – Simple tool-light replacement—twist into existing bypass manifold and secure with spring clip included

• Improves Heater Longevity – Frequent failure point; this replacement helps prevent intermittent overheating and shutdowns 

Product Overview

The Swimables SW‑41‑007 thermal regulator is engineered as a direct OEM-style replacement for Pentair part number 38000‑0007S, compatible with both MasterTemp and Max‑E‑Therm heater systems. It features a precision thermal housing and includes the necessary spring clip for secure, tool-light installation—just twist in and lock.

This component serves as a critical flow/temperature control device. It senses water temperature and adjusts bypass flow accordingly to keep heating cycles consistent. A failing regulator can lead to intermittent overheating, shutdowns during spa mode, or heaters cycling off unexpectedly. Replacing it helps prevent these common issues and stabilizes performance.

Constructed from brass and built to withstand pool environments, the SW‑41‑007 delivers reliable service. Users frequently replace this part during routine maintenance—especially in salt-water systems or older heaters where buildup or corrosion affects performance