Pentair Thermal Regulator Replacement, MT125 | 474989 Column Water is leaking at the

Water is leaking at the heater connection point

suction parts

12 ft × 24 ft or 16 ft × 26 ft

replacement is the clean fix instead of trying to reuse broken trim or distorted openings

Manufacturer part number: 99958907-DIY

Pentair Thermal Regulator Replacement, MT125 | 474989 Column Water is leaking at theWhat This Part Is Used For Pentair 474989 Thermal Regulator Replacement MT125 is a replacement thermal regulator for compatible Pentair MasterTemp 125 heater models. It helps manage water temperature flow through the heater assembly. Why This Part Matters A faulty thermal regulator can lead to improper heating or error conditions. Replacing it restores correct water flow regulation inside the heater. Proper thermal control helps protect internal