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The RHEEM ezt-225 is a condensate overflow safety switch designed to protect HVAC systems from water damage caused by blocked or overflowing condensate drain lines. Installed on either the main or auxiliary drain line, the switch detects rising condensate levels and interrupts system operation before overflow occurs. Licensed HVAC technicians install this device as part of routine maintenance upgrades or new system commissioning, particularly in applications where local codes require secondary drain protection or where equipment is located in areas sensitive to water damage.
The ezt-225 is suited for residential and light commercial split systems, package units, and air handlers where condensate management is critical. It mounts directly to the main drain line or the auxiliary drain pan outlet, making it adaptable to a variety of installation configurations. This switch is a practical solution in attic installations, closet-mounted air handlers, and other locations where an undetected drain backup could cause significant structural or equipment damage.
Designed as an OEM-style replacement or upgrade condensate overflow safety switch for residential and light commercial HVAC systems requiring main or auxiliary drain line protection.
Installation should be performed by a licensed HVAC technician. Disconnect power to the air handler or furnace before installing or servicing the switch. The switch is typically wired in series with the low-voltage control circuit so that a triggered condition shuts down the system. Verify local mechanical and electrical codes for requirements governing condensate overflow protection devices.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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