Loprest
About
Loprest Water Treatment Co., a subsidiary of Water Remediation Technology (WRT), has been designing and manufacturing water filtration and treatment systems for over 90 years from its California headquarters. The company specializes in removing iron, manganese, arsenic, nitrate, and other regulated contaminants from drinking water and process water, with treatment capacities ranging from 10 to 10,000 GPM. Loprest's flagship technology is SYNCRO-CLEANSE, a patented backwash minimization design that combines air and water backwashing to reduce backwash volume and shorten backwash duration, extending filter run times and saving water. The product lineup includes multi-cell pressure filtration systems (described as the most economical equipment configuration available), ion exchange systems for nitrate and arsenic removal, granular activated carbon (GAC) adsorption systems for organic contaminants and disinfection byproduct precursors, and custom-designed controls that Loprest programs and manufactures in-house. For arsenic treatment, Loprest offers four distinct approaches — coagulation/filtration, adsorptive media, ion exchange, and membrane processes — each engineered for site-specific raw water chemistry. The company provides field pilot studies using portable or trailer-mounted units, typically running one to three weeks, and delivers pilot reports with full-scale system cost proposals. Media replacement, filter inspection, and onsite maintenance services round out the offering.
Key Products
Patented multi-cell pressure filtration systems using SYNCRO-CLEANSE backwash technology that minimizes backwash volumes and reduces backwash time through combined air and water backwashing.
Contaminant-specific removal systems using ion exchange resin technology for arsenic, nitrate, and other dissolved contaminants in drinking water and process water.
Adsorption filtration systems using granular activated carbon media for removal of organic contaminants, taste, odor, and disinfection byproduct precursors from water.
Economical multi-cell filter configuration that allows continuous treatment operation while individual cells are backwashed, described as the most economical equipment configuration available.
Filtration systems using oxidation processes ahead of filters with proper media selection to achieve treated water levels below MCLs for iron and manganese.
Site-specific arsenic removal systems using one of four approaches: coagulation/filtration, adsorptive media, ion exchange, or membrane processes, optimized for raw water quality and treatment objectives.
Ion exchange or other treatment systems specifically designed to reduce nitrate concentrations in drinking water below the MCL.
Custom-designed, manufactured, and programmed control systems for automated operation and monitoring of Loprest water treatment equipment.
On-site pilot testing using portable or trailer-mounted units to demonstrate treatment effectiveness, typically running 1-3 weeks, delivering a pilot report and full-scale system cost proposal.
Service for replacing spent filtration media and conducting thorough filter inspections to maintain treatment system performance.
Field service providing evaluation and maintenance of installed Loprest treatment systems at customer sites.
Service Area
National coverage
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