Pentair MasterTemp 125 Thermal Regulator (474989) leviton Useful when the original O-ring

Useful when the original O-ring is worn or failing

Useful for replacing damaged or missing grate parts

Air buttons are useful because they allow a user to trigger a remote pneumatic switch without placing direct electrical switching at the point of contact

Designed for focused pool-surface scrubbing

or too worn to support reliable filtration

Pentair MasterTemp 125 Thermal Regulator (474989) leviton Useful when the original O-ringKeeping pool equipment in dependable condition often comes down to the right replacement component; this MasterTemp 125 Thermal Regulator is built for that role. Because pool equipment operates under heat, pressure, water exposure, and repeated service cycles, choosing the correct replacement helps reduce callbacks. For MasterTemp 125 heater work, correct component selection helps protect heating performance, water side sealing, ignition reliability,