Marketair RBX3-MD-NC Drain Rough-in Box Mini-split

Product Description

The MARKETAIR RBX3-MD-NC is a drain rough-in box designed for mini-split system installations. It provides a structured enclosure for routing and terminating the condensate drain line during the rough-in phase of a mini-split installation. This component is installed in the wall or mounting surface before the indoor air handler is set, allowing the drain connection to be properly positioned and protected. HVAC technicians working on ductless mini-split systems will use this box as part of a clean, code-friendly rough-in assembly.

The RBX3-MD-NC is intended for mini-split drain rough-in applications in residential and light commercial settings. It is used during the pre-installation or rough-in stage, before final equipment is mounted, to establish the drain outlet location. This type of component is common in new construction and retrofit mini-split projects where a finished wall appearance and organized line set routing are required.

Key Features

• Designed specifically for mini-split condensate drain rough-in installations
• Provides a structured enclosure for drain line termination at the wall
• Supports a clean, finished appearance for indoor unit mounting locations
• Suitable for residential and light commercial mini-split applications

Compatibility

Designed as an OEM-style rough-in accessory for mini-split condensate drain installations.

Installation Notes

Installation is typically performed by a licensed HVAC technician during the rough-in phase, prior to mounting the indoor air handler. Ensure the drain box is positioned according to the indoor unit manufacturer's layout requirements before securing to the wall surface. Power to any associated electrical circuits should be off before beginning any line set or drain work. Follow local mechanical codes for condensate drain routing and slope requirements.