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The HARCO 69-3149B is a 3/4 inch socket fusion HDPE cap designed to terminate water service lines made from high-density polyethylene pipe. This black cap uses the socket fusion joining method, which creates a homogeneous, leak-free connection without mechanical fittings or adhesives. It is rated for potable water service applications and is installed by licensed plumbers and utility contractors working on underground water distribution systems. The all-plastic HDPE construction resists corrosion, chemicals, and soil conditions that would degrade metal fittings over time.
This cap is used in residential and light commercial water service applications where a 3/4 inch HDPE line must be capped, pressure tested, or decommissioned. It is suited for direct burial installations and is commonly specified in new subdivision water main extensions, service lateral work, and irrigation system dead-end terminations. Socket fusion fittings of this type are standard in municipal and private water utility construction across North America.
Designed as an OEM-style socket fusion cap for 3/4 inch HDPE water service pipe systems following standard DR-ratings common in residential and commercial water distribution.
Socket fusion fittings are installed by plumbers or utility contractors using a socket fusion tool, properly sized facing tool, and depth gauge. Shut off and depressurize the water line before cutting or capping. Follow pipe manufacturer heating time and temperature specifications for the fitting size, and allow the joint to cool undisturbed before restoring pressure. Work should comply with applicable local plumbing codes and AWWA standards for water service installations.
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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