Product Overview

The Swimables SW-41-007 is a replacement thermal regulator for Pentair MasterTemp and Sta-Rite Max-E-Therm pool heaters. The thermal regulator sits in the heater's water system and helps control water flow through the heat exchanger as temperatures change. Replace it when the original regulator is worn, stuck, or damaged. Swimables is an aftermarket brand that builds replacement parts for widely used pool equipment.

⚠️ Important Purchase Notice

This is an aftermarket Swimables part, not a Pentair OEM part. Turn off power and gas to the heater and let it cool before servicing. Heater repairs should be done by a qualified technician following the heater manual. Inspect the shipment upon arrival and report damage promptly.

WARNING: This product can expose you to chemicals 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.

Ideal For

• Replacing a worn or stuck thermal regulator on a MasterTemp or Max-E-Therm heater.
• Pool service professionals stocking common heater repair parts.
• Owners looking for a lower-cost alternative to the OEM part.

Key Features

• Swimables model SW-41-007.
• Made for Pentair MasterTemp and Sta-Rite Max-E-Therm heaters.
• Built from durable parts and materials for long service life.
• Compact part, easy to keep on the service truck.

Benefits

• Helps restore normal water-flow control through the heater.
• Costs less than the OEM regulator.
• Replaces a single worn part instead of a larger assembly.

Compatibility

Fits Pentair MasterTemp and Sta-Rite Max-E-Therm pool heaters. The Pentair OEM version of this part is 38000-0007S, which includes a clip. Confirm your heater model and the part number SW-41-007 before ordering.

Installation or Upgrade Context

With power and gas off and the heater cool, drain the heater, open the water-side housing that holds the thermal regulator, remove the old regulator, and install the new one in the same orientation. Reassemble, refill, and check for leaks before restoring power and gas.

What’s Included

• One Swimables SW-41-007 thermal regulator

Specifications

Warranty

Covered by the manufacturer's warranty, subject to Swimables' applicable terms. Contact Swimables for warranty claim instructions; Pool Supply Depot can provide proof of purchase.

Customer Q&A

Is this a Pentair part?

No. It is an aftermarket replacement made by Swimables for Pentair MasterTemp and Sta-Rite Max-E-Therm heaters.

Does it come with the clip?

The listing covers the thermal regulator only. The Pentair OEM version, 38000-0007S, includes a clip.

What does a thermal regulator do?

It helps control water flow through the heater's heat exchanger as temperatures change.