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The CAPLUGS 14204 is a mechanical pipe plug designed to seal open-ended pipes during storage, shipping, transit, or surface finishing operations. The plug inserts directly into the pipe bore to create a secure, removable seal that protects pipe threads and interior surfaces from contamination, debris, and damage. Sized for 3/8 inch pipe, it is a standard fitment in plumbing, HVAC, and industrial piping applications. Plumbers, pipefitters, and mechanical contractors routinely use these plugs during rough-in work, pressure testing staging, and equipment storage.
The 14204 is suited for use in residential and commercial plumbing systems, HVAC refrigerant and water piping, and industrial process lines wherever a 3/8 inch open pipe end requires temporary or semi-permanent closure. The plug is commonly installed at stub-outs, capped service lines, and open fittings awaiting final connection. It is available in a package quantity of 100 units, making it practical for stocking on service vehicles or in supply rooms for repeated use across multiple jobs.
Designed as a standard mechanical plug for 3/8 inch pipe ends across residential and commercial plumbing, HVAC, and industrial piping applications.
Installation is performed by hand insertion into the open pipe bore and does not require special tools. Ensure the pipe end is clean and free of burrs or debris before seating the plug to achieve a proper seal. Always verify the plug is fully seated and secure before pressurizing or inspecting a system. Remove the plug before final system commissioning and connection.
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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