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Leopold has long been a worldwide leader in the water and wastewater treatment industry supplying both filtration and clarification systems. Leopold History. • In the filtration business since • Pioneer of the Dual/ Parallel Lateral Underdrain. • Benefits from own product development center/ R&D. Leopold Underdrain vs. Nozzle Floor. Page 2. Leopold Underdrain vs. Nozzle Underdrain. Dual Parallel Lateral Filter Underdrains. Nozzle Floor.

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The bolt-down solution is engineered for reliability with an uplift resistance of over 15 psi. Comments on this site are submitted by users and are not endorsed by nor do they reflect the views or opinions of COLE Publishing, Inc.

Both feature a unique water recovery channel for superior air scouring and water backwash performance.

Knderdrain Type S technology underdrain is designed to provide uniform distribution of wash water and air to clean every corner of the filter without media upset. Both feature the dual parallel lateral design pioneered by Leopold, ensuring uniform distribution of water and air at each dispersion orifice opening even in extra long lengths. The modular underdrain blocks are easy to handle and snap together for quick installation. Durable reinforced polymer maximizes strength against harsh elements while reducing overall weight for unedrdrain transport and installation.


Locate a distributor in your area. Physically rigid design reduces flexing and withstands pressures up to 15 psi.

Can be designed for center and front flumes. Leopold Underdrains Thanks to Xylem. Easy handling – snap together for quick installation. The IMS Cap eliminates the need for gravel thereby allowing for deeper media depth. Uniform distribution of air and water even in extra-long lengths.

Leopold Universal Type S® Underdrain by Xylem

Suitable for drinking water plants and desalination plants. Suitable for wastewater plants, biologically active filters and more. Newsletter Sign Up Join 16, of your colleagues who already get great leopokd delivered right to their inbox. Superior air and water distribution for effective backwash, giving longer filter runs and lower operating costs.

EPA LT2 rules on contaminants of emerging concern, and the rehabilitation of existing media filters. Request more detailed information or literature. By washing percent of the media between laterals, the underdrain increases filter run times, reduces backwash water consumption and extends media filter life, leading to lower operating costs and energy savings.

EP2525887A4 – Apparatus and method for securing underdrain filter block – Google Patents

Best uplift resistance – withstands uplift pressures up to 30 psi 2 bar. September 13, Stellar Management. The design includes slots and orifices around the entire underdrain to help clean the filter media from every angle during the backwash process.


Both are constructed of high-density polyethylene HDPE construction for strength and corrosion resistance. Handles for quick and easy installation, and snaps together for quick installation.

More driving head results in longer filter runs.

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EPA4 – Apparatus and method for securing underdrain filter block – Google Patents

Provides even backwash distribution to deep clean filter media. Precision-engineered 1 mm slots support media down to microns 1. This eliminates media dead zones that can develop due to gaps in backwashing coverage. March 06, Towering Above the Competition. Air stability is improved with all orifices providing uniform and continuous airflow.

With lateral lengths over 40 feet, it is suited for long filter runs and retrofits of existing filters.