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What is the Drain-waste-vent (DWV)?(3)

Source:Lucy Xie Time:2016-7-22 17:34:35

7. Wye ("Y") fitting

A fitting with three openings, a wye is used to join or create branch lines. It is a type of waste fitting tee which has the side inlet pipe entering at a 45° angle, or an angle other than 90 degrees. A standard wye is a "Y" shaped fitting which allows one pipe to be joined to another at a 45 degree angle.

SEKO Machinery Co.,ltd. engages in researching,developing and manufacturing all series of weld bead rolling machine and providing customers with complete weld bead leveling method and flow process to meet their requirements on improving product quality.The machine of Seko Machinery can be applied to produce all kinds of tubes widely.

 

Wyes are similar to tees except that the branch line is angled to reduce friction and turbulence that could hamper the flow. A common use is attaching a vertical drainage pipe to a horizontal one, to help maintain flow drainage direction The connection is typically at a 45-degree angle rather than a 90-degree angle, if a branch turns out further at the end to be 90-degree (perpendicular) the fitting becomes a combo tee. Wye's and combo wye's are referred to as following a "long sweep" pattern, relative to sanitary tees and short sweep bends, which are referred to as "short sweep" (i.e. smaller radius to complete turn). Short sweep take up less space to turn, but don't have the advantages listed above.

A wye branch may also be used to split a branch line equally in two directions. The opening sizes can vary for different situations, for instance in situation where a large main line needs to be split into two smaller branches.

Wyes also have use in industrial applications. Low-priced wyes are often spot-welded together, whereas industrial wyes have a continuous weld at each seam. In long-distance pipeline applications, a true wye fitting is also engineered for closed system instrumentation pigging configurations or wherever a smooth pipe branch is used.

8. Double-tapped bushing

A double-tapped bushing is a fitting that has opposing threads on the inside diameter of the bushing.


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