Midland Industries 20531P Push-on Hose Stem Adapter

Product Description

The MIDLAND INDUSTRIES 20531P is a polypropylene push-on hose stem adapter designed to connect a 5/16-inch push-on hose stem on one end to a 1/4-inch male iron pipe (MIP) thread on the other. This fitting transitions between a flexible hose and a threaded pipe connection in low-pressure fluid or air systems. It is lightweight at 0.01 pounds and compact at approximately 1 inch in length, making it suited for tight installation spaces. Plumbers, HVAC technicians, and industrial maintenance professionals install this type of adapter where a quick hose-to-pipe connection is needed without specialized tooling.

This adapter is commonly used in residential and light commercial plumbing, HVAC auxiliary drain lines, and pneumatic or fluid transfer systems that use push-on hose assemblies. The polypropylene construction resists corrosion and is appropriate for water, mild chemicals, and low-pressure air applications. Its push-on stem accepts standard 5/16-inch hose, while the 1/4-18 NPT male thread connects to standard female-threaded ports or fittings.

Key Features

• 5/16-inch push-on hose stem accepts standard flexible hose without clamps or tools
• 1/4-inch MIP (1/4-18 NPT) thread mates to standard female-threaded fittings or ports
• Polypropylene construction provides corrosion resistance and chemical compatibility with water and mild fluids
• Compact footprint - approximately 1 inch length, 0.8 inch width, 0.75 inch height
• Lightweight at 0.01 pounds - suited for installations where weight and space are constraints

Compatibility

Designed as an OEM-style replacement or new-installation fitting for systems using 5/16-inch push-on hose connections and 1/4-inch NPT male threaded ports in plumbing and HVAC applications.

Installation Notes

This fitting is typically installed by licensed plumbers or HVAC technicians. Apply thread sealant tape or pipe compound to the MIP threads before installation and tighten to snug - do not overtighten polypropylene fittings, as the material can crack under excess torque. Ensure the system is depressurized and fluid flow is shut off before removing or installing any fitting. Verify the hose inner diameter matches the 5/16-inch stem before pushing the hose onto the barb.