ZoneFirst MMPK Control Kit THPU32HP7Y OEM Standards: Restores factory-spec performance

OEM Standards: Restores factory-spec performance and cycling behavior to the indirect water heater

professional appearance that matches standard heater housings while the 40°F to 100°F temperature range allows for precise environmental calibration

Key Benefits Vibration Resistance: The armored brass sleeve protects the internal copper tube from abrasion and stress fractures caused by reciprocating compressors

this unit is specifically designed to replace the MK-573 series and 2473-130 models

ZoneFirst MMPK Control Kit THPU32HP7Y OEM Standards: Restores factory-spec performanceThe ZoneFirst MMPK is a professional grade 3 zone control kit engineered for single stage HVAC systems, serving as the direct functional successor to the legacy MMP3K model. Transitioning to the MMPK provides technicians with a streamlined Plug In Play zoning system that utilizes RJ11 modular jacks for rapid damper connections, significantly reducing field labor time. This kit includes the foundational MMP3 control panel, a dedicated T24 transformer,