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What is a Sanitary Tee?

Published in Plumbing Fittings 3 mins read

A sanitary tee is a plumbing fitting designed to connect three pipes, with a specific focus on facilitating the flow of waste and preventing the backflow of gasses. It's not just a simple "T" fitting; its design includes a gentle curve on the branch inlet to help direct liquids and solids downwards into the drain line.

Key Features of a Sanitary Tee

Feature Description
Curved Inlet The most significant characteristic is the curved branch inlet that directs flow.
Waste Flow Primarily designed for waste flow applications.
Vent Use Can be used for air vents but should not receive waste when oriented horizontally or on its back.
Material Typically made from materials like PVC, ABS, or cast iron, depending on the plumbing system requirements.
Configurations Can be oriented vertically with the branch receiving waste, but not horizontally when receiving waste.

How a Sanitary Tee Differs From a Standard Tee

While a standard tee has a straight branch inlet, the sanitary tee's curved inlet makes it suitable for applications where gravity flow and preventing clogs are crucial.

How To Use A Sanitary Tee

  • Vertical Orientation: A sanitary tee is commonly installed vertically to connect a drain line from a fixture (like a sink or toilet) into a main waste line. The branch inlet is positioned to receive the wastewater.
  • Vent Purposes: According to the provided YouTube reference, a sanitary tee can be used to receive air in a horizontal orientation on its back, as long as it's only receiving air. It cannot receive waste in this orientation.
  • Avoid Horizontal Waste: It is important to note, as the YouTube video reference indicates, you cannot use a sanitary tee horizontally where it's receiving waste.

Practical Insights

  • Sanitary tees are essential in preventing clogs and ensuring wastewater flows smoothly through a plumbing system.
  • Choosing the correct tee for a specific plumbing application is critical to avoid costly mistakes and ensure proper drainage.

Examples of Use

  • Connecting a kitchen sink drain to a main drain line.
  • Joining a bathroom sink drain to a waste pipe.
  • Creating a vent for plumbing systems.

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