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The MIDLAND INDUSTRIES 20859P is a tube-to-hose stem adapter designed to connect a 5/16-inch push-on hose stem to a 3/8-inch hose barb fitting. Constructed from polypropylene, this adapter is suited for low-pressure fluid transfer applications where lightweight, corrosion-resistant plastic fittings are required. It is used in plumbing, HVAC, and industrial fluid-handling assemblies where a quick, tool-free push-on connection on one side mates to a standard barbed hose on the other. Licensed plumbers, HVAC technicians, and industrial maintenance professionals install this type of fitting as part of tubing and hose assemblies.
This adapter is appropriate for residential and light commercial applications involving flexible tubing and hose runs. The push-on end accepts standard 5/16-inch hose or tubing, while the 3/8-inch barbed end secures to compatible rubber or flexible plastic hose. It is classified as a plastic push-in tube-to-hose stem fitting, suitable for use in low-pressure, non-critical fluid transfer systems where polypropylene is chemically compatible with the media being conveyed.
Designed as an OEM-style replacement or standard fitting for plastic push-in tube-to-hose stem assemblies in low-pressure plumbing and fluid-handling systems.
This adapter should be installed by a qualified plumber or HVAC technician familiar with plastic fitting assemblies. Relieve all system pressure and drain fluid before disassembling or installing any fitting. Do not exceed the pressure or temperature ratings appropriate for polypropylene fittings in the application. Avoid over-tightening or applying excessive mechanical force to the plastic body, as this can cause cracking or fitting failure.
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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