Little Giant 599065 Check Valve Discharge Adapter

Product Description

The LITTLE GIANT 599065 is a check valve and discharge adapter designed for use with condensate removal and fluid transfer applications in HVAC and plumbing systems. This fitting combines a check valve function with a discharge adapter in a single component, preventing backflow while directing fluid to a drain or collection point. It is sized for 3/8 inch vinyl tubing on the outlet side and features a 1/4 inch NPT threaded connection. Licensed HVAC technicians and plumbing professionals install this type of fitting as part of condensate pump discharge assemblies and low-pressure drainage lines.

This adapter is commonly used in residential and light commercial HVAC installations where a condensate pump requires a secure, leak-free discharge connection. The 3/8 inch vinyl tubing compatibility makes it a straightforward fit for standard condensate line setups, while the 1/4 inch NPT port allows direct threaded attachment to pump housings or fittings. It is well suited for split system air handlers, mini-split drain applications, and similar installations where controlled one-way flow is required at the discharge point.

Key Features

• Integrated check valve prevents condensate backflow in discharge lines
• Compatible with 3/8 inch vinyl tubing for standard condensate pump connections
• 1/4 inch NPT threaded port for secure attachment to pump bodies or fittings
• Compact single-component design simplifies installation and reduces connection points
• Designed for low-pressure condensate and fluid transfer service

Compatibility

Designed as an OEM-style check valve and discharge adapter for use with condensate removal pumps and systems requiring 3/8 inch vinyl tubing and a 1/4 inch NPT connection.

Installation Notes

Installation should be performed by a licensed HVAC technician or plumber. Disconnect power to the condensate pump and confirm the system is depressurized before removing or installing any fittings. Ensure the NPT threads are properly sealed with an appropriate thread sealant tape to prevent leaks. Verify that the check valve orientation matches the intended flow direction before completing the installation.