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The MIDLAND INDUSTRIES 20011A is a push-to-connect plug fitting used to cap open ports in pneumatic and fluid distribution lines. Made from polypropylene, it accepts 3/8-inch push-to-connect tubing and is rated to 125 psi. The plug seats quickly without tools, making it a reliable solution for isolating unused ports during service, system modifications, or staged installations. Plumbers, HVAC technicians, and general pipe fitters commonly use this fitting when capping off branch lines or test ports in low-to-medium pressure systems.
This plug is suited for residential and light commercial applications where a fast, secure port seal is required. It fits into existing push-to-connect manifold systems, air lines, and fluid distribution assemblies with a 3/8-inch port. Its compact form factor allows installation in tight spaces without the need for wrenches or thread sealants, reducing installation time and the chance of thread damage on delicate plastic or brass manifold bodies.
Designed as an OEM-style replacement or service plug for push-to-connect systems using 3/8-inch port connections in residential and light commercial plumbing, HVAC, and pneumatic applications.
A licensed plumber or HVAC technician should depressurize and isolate the system before installing or removing any push-to-connect fitting. Ensure the tubing or port is clean and free of debris before seating the plug. No thread sealant or tools are required for push-to-connect engagement, but verify the fitting is fully seated and locked before re-pressurizing the system.
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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