Nelsen 21 x 62 Filter Unit

When a commercial site needs robust, automated filtration that simply keeps running, the Nelsen 21 x 62 Filter Unit is built to deliver. This 21" x 62" system uses the Nelsen WS2EE or WS2QC 2" control valve, lead-free brass commercial hardware with six fully adjustable cycles that let operators dial in regeneration to match real-world water conditions.

Rated for a 125 gpm service flow with a 85 gpm backwash, the unit suits mid-to-larger commercial demands such as hospitality, food service, light manufacturing, and multi-unit properties. The mineral tank ships complete with commercial distributors and a graded gravel underbed, and the choice of filter media is yours, so the same platform can target sediment, iron and manganese, chlorine taste and odor, or low pH.

Built-in monitoring and flexibility

• 2" top-mount control valve for commercial and industrial service
• Solid-state microprocessor with intuitive front-panel programming
• Totalizer display: time of day, days to regeneration, volume remaining, flow rate, and total usage
• Meter immediate, meter delayed, or time-clock delayed regeneration
• Optional double backwash for thorough media cleaning and efficiency
• 8-hour coin-cell lithium battery backup to preserve settings during outages

The full 6-cycle sequence provides controlled backwash, down-flow brining and slow rinse, a second backwash when enabled, fast rinse, refill, and down-flow service. Regenerant refill uses post-treated water, and the reliable DC drive paired with a 12-volt AC adapter keeps installation safe and uncomplicated. Lead-free brass construction supports compliance for potable applications. At approximately 287 lbs as built, this Nelsen filter is a dependable, install-once answer for businesses that need clean, consistent water and want full transparency into how their system is performing.

A correctly sized media bed and adequate backwash flow are what keep a commercial filter performing year after year, and this 21 x 62 configuration balances service capacity against the freeboard needed for effective bed expansion. During regeneration, reversed flow lifts and scours the media, sending accumulated solids to drain so the bed is refreshed for the next cycle. Selecting the right media for your water analysis is the key decision, and because the Nelsen platform accommodates a range of media, the system can be tuned to the contaminants that actually matter at your site. Combined with the Nelsen valve's clear diagnostics and proven drive, the result is a filtration solution that installers can commission confidently and operators can maintain with minimal effort over a long service life.