Product/Service

TETRA LP Block: Dual Parallel Lateral Underdrain

Source: Severn Trent Services

TETRA_LP

The TETRA LP Block dual parallel lateral underdrain from Severn Trent Services offers superior distribution of both backwash air and water, either sequentially or concurrently.

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Brochure: TETRA LP Block: Dual Parallel Lateral Underdrain

In municipal drinking water applications or pre-treatment for desalination plants using gravity filters, the filter underdrain is one of the most important components contributing to overall system performance and operation — whether a new filter design or retrofitting an existing filter.

The TETRA® LP Block™ dual parallel lateral underdrain from Severn Trent Services is a proven design of filter underdrain offering superior distribution of both backwash air and water, either sequentially or concurrently.

Effective media cleaning is the key requirement for a filter to function efficiently under all loading conditions. Backwashing gravity or upflow filters is necessary to remove the solids collected by the media during the filtration run. In the TETRA LP Block underdrain, air and/ or water is distributed evenly across the entire filter bottom during the backwash cycle to effectively remove and release solids from the filter. The use of concurrent or sequential air and water significantly reduces the volume of dirty backwash water produced and drastically lowers operating costs through the uniform backwash process.

The TETRA LP Block underdrain ensures lower operating costs and effective backwash distribution that can improve run times.

The TETRA LP Block underdrain features the unique Anchor-Rite® and GroutGrip™ design. The GroupGrip increases resistance to uplift from the filter floor and the Anchor-Rite fastens the block to the floor. The LP Block with GroupGrip includes six rows of integrally molded dovetail wedges that become embedded in the floor grout, offering 1.75 times the pullout strength of a conventional underdrain block.

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Brochure: TETRA LP Block: Dual Parallel Lateral Underdrain

 

 

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