ARU Thermal Regulator #77707-0010 is Compatible with MasterTemp 400, 250, 125, 200, 300, 333 and Sta-Rite Pool Spa Heaters SR200, SR333, SR400

Features

• Wide Compatibility: Directly replaces part numbers 77707 - 0010 & 38000 - 0007S.
• Easy Testing & Diagnosis: Suspect a faulty regulator? Simply place it in water heated to 130°F or higher. If it doesn't open, it's time for a replacement. This thermal regulator ensures your pool heater runs efficiently, preventing overheating and energy waste.
• Simple Installation: It's located between the inlet and outlet water connections on the water manifold. No special tools are needed - replacement takes just minutes.
• User - Friendly Design: Our thermal regulator withstands high temperatures and constant water flow without performance loss. Its rugged design eliminates frequent replacements. Just install it and enjoy consistent, worry - free heating for your pool or spa.
• The product includes regulators, springs, valve covers, a clip, and replacement O - rings.