News | June 10, 2013

Xylem Introduces New Leopold-Brand Underdrain In The Market

Source: Leopold -- A Xylem Brand
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Xylem Inc., a leading global water technology company focused on addressing the world’s most challenging water issues, has launched a new underdrain as part of its complete Leopold® Filterworx® gravity media filtration system. Innovative design features of Xylem’s Leopold Type XA Underdrain include a compact height, internal arch design and grout-pocket technology (patent pending) that combine to allow treatment plants to consistently deliver higher quality effluent. Grout pockets are capable of resisting up to 30 pounds per square inch (psi) (2.1 bar) of uplift pressures; higher than any other underdrain on the market*.

At just 8.25 inches (209mm) tall the new underdrain allows for a lower vertical footprint that results in either increased filtration driving head or reduced capital costs. Its breakthrough arch design improves efficiency and enables longer lateral runs of up to 32 feet or 9.75 meters.

The new underdrain from Xylem is suitable for applications such as potable water, wastewater or desalination pre-treatment filters. It also works with almost all filter flume arrangements, nincluding wall feed. In addition, Xylem’s new underdrain employs a new patented quick snap on/off handle, which improves ease of installation. Combined with Leopold’s I.M.S® 200 or 1000 media retainers and Leopold’s GROUT-TITE bridge, Xylem’s Leopold Type XA Underdrain provides a reliable and flexible filtration system with low cost of ownership.

Brian Bates, Xylem’s product manager for filtration and separation, said, “It is a robust and reliable product that can withstand extremely stressful conditions thanks to its unique capacity to resist high uplift pressures. Interior baffles and dual water recovery channels ensure that this new underdrain delivers superior backwash air and water distribution. The product is truly universal, as it is compatible with water-only or a combination of air and water backwash methods.  Installing Xylem’s new Leopold Type XA Underdrain helps the filter function in an efficient and cost effective manner while delivering high quality effluent.”

“It can be used in a range of different settings including drinking water, wastewater and desalination plants. It is used to support a variety of filter media and media configurations. It also can be used to remove solids as the final step before disinfection or act as a granular activated carbon contactor in drinking water operations. In desalination plants, the underdrain supports the media and can work as part of the pre-treatment phase prior to reverse osmosis membrane filtration,” continued Bates.

Xylem boasts the world’s most extensive underdrain reference list with 8,000 Leopold Underdrains installed around the world since 1924.

* Xylem’s Leopold Type XA Underdrain can resist up to 30psi/2.1 bar of uplift pressures which is three times what the nearest competitor can withstand.

About Xylem
Xylem is a leading global water technology provider, enabling customers to transport, treat, test and efficiently use water in public utility, residential and commercial building services, industrial and agricultural settings. The company does business in more than 150 countries through a number of market-leading product brands, and its people bring broad applications expertise with a strong focus on finding local solutions to the world’s most challenging water and wastewater problems. Xylem is headquartered in White Plains, N.Y., with 2012 annual revenues of $3.8B and 12,500 employees worldwide. In 2012, Xylem was named to the Dow Jones Sustainability World Index for advancing sustainable business practices and solutions worldwide.

The name Xylem is derived from classical Greek and is the tissue that transports water in plants, highlighting the engineering efficiency of our water-centric business by linking it with the best water transportation of all -- that which occurs in nature. For more information, visit

SOURCE: Leopold -- A Xylem Brand