Rectorseal MSD-AA1-FS Condensate Drain Float Switch

Product Description

The RECTORSEAL MSD-AA1-FS is a combined condensate drain cleanout fitting and overflow-activated float switch assembly for HVAC condensate management systems. The unit integrates a threaded cleanout port with a mechanical float switch in a single assembly, allowing drain line access and high-water-level detection without separate components. The float switch interfaces with 24 VAC low-voltage control circuits to trigger equipment shutdown or alarm signaling when condensate reaches an unsafe level in the secondary drain pan. Licensed HVAC technicians install this fitting as part of a compliant condensate overflow protection setup in residential and light commercial systems.

This assembly is suited for residential and light commercial HVAC installations where secondary drain pan monitoring is required by code or manufacturer specification. The cleanout port accepts standard mechanical snake tools and chemical drain treatments, making routine condensate line maintenance straightforward without disconnecting drain plumbing. The integrated float switch eliminates the need for a separate overflow sensor, simplifying installation in tight mechanical spaces around air handlers and fan coil units.

Key Features

• Combined cleanout fitting and float switch in a single assembly reduces component count
• Threaded cleanout port provides access for mechanical and chemical drain line cleaning
• Mechanical float switch detects high condensate water levels in secondary drain pans
• Rated for 24 VAC low-voltage control circuits standard in residential and light commercial HVAC systems
• Designed for equipment shutdown or alarm circuit integration on high-water detection
• Supports secondary pan safety protection practices per local mechanical codes

Compatibility

Designed as an OEM-style replacement and new-installation fitting for residential and light commercial HVAC condensate drain pan safety applications requiring an integrated cleanout and float switch assembly.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with condensate drain systems and low-voltage control wiring. Shut down and lock out the HVAC unit before installing or servicing this assembly. Verify that the float switch wiring connections comply with the equipment manufacturer wiring diagram and applicable local mechanical and electrical codes. Do not energize the control circuit until all fittings are secure and the drain pan is confirmed dry and free of debris.

Technical Specifications

• Control Voltage: 24 VAC
• Application: Residential and light commercial HVAC condensate drain secondary pan safety
• Switch Type: Mechanical float switch
• Function: High condensate level detection with equipment shutdown or alarm output

Standard Information

• Brand: RECTORSEAL
• Manufacturer Part Number: MSD-AA1-FS