High-Durability Epoxy Sand Media Filters with Removable Stainless Underdrains

Everfilt® SM-Series3 Sand Media Filters

High-demand irrigation systems rely on dependable filtration to protect pumps, pipelines, emitters, and fertigation equipment. The SM-Series3 Epoxy Removable Underdrain Sand Media Filter is engineered specifically for long-term field performance, offering a rugged design, serviceable construction, and the corrosion resistance required for harsh agricultural environments.

With removable 304 stainless steel wedge wire underdrains and industrial-grade epoxy coatings, these filters deliver consistent water quality and are built to withstand years of outdoor exposure.

A Sand Media Filter Engineered for Maximum Durability

SM-Series3 sand media filters are designed for agricultural operations that cannot accept downtime. Every tank incorporates:

• Heavy-duty, 3-leg construction for stability & long-term field use

• Grooved inlet/outlet couplings & gaskets for secure, reliable connections

• A grooved media fill port with a carbon-steel lid that simplifies loading

• A single media drain port for efficient maintenance

• A side-access manway that allows quick inspection & easy media removal

This configuration ensures fast serviceability, essential for high-flow irrigation systems where consistency is critical.

The Power of a Removable 304 Stainless Steel Wedge Wire Underdrain

Unlike filters that rely on PVC components or false-bottom assemblies, the SM-Series3 uses a full stainless steel removable wedge wire underdrain. This design increases strength, improves flow characteristics, and eliminates the risk of plastic components deforming or degrading over time.

The removable underdrain offers several key advantages:

• Superior longevity in corrosive or high-temperature environments

• Higher structural integrity compared to plastic or composite underdrains

• Faster maintenance and replacement thanks to a fully accessible design

• No false bottoms, reducing flow restriction & maintenance complexity

This underdrain system is one of the defining features that sets the SM-Series3 apart in agricultural sand media filtration.

Industrial-Grade Epoxy Coatings for Extreme Environments

Exterior and interior coatings determine how well a filter will survive daily exposure to weather, chemicals, soil, and UV radiation. The SM-Series3 features a two-part exterior epoxy gloss coating over an industrial primer to deliver long-lasting UV and weather resistance.

Internally, a brushed-on 233H industrial epoxy layer protects the tank from corrosion, abrasive silica sand, and chemically treated irrigation water. These coatings are specifically chosen for agricultural use where filters operate outdoors year-round in direct sunlight, heat, humidity, and dust.

Wide Range of Sizes & Flow Capacities

The SM-Series3 line offers multiple tank diameters and operating pressures to match system requirements:

• Diameters: 12", 18", 24", 30", 36", 48", 54"

• Side Shell Height: 18"t

• Operating Pressure: 80 PSI (36"–54"), 100 PSI (24"–30"), 125 PSI (12"–18")

• Flow Rates: 15 GPM minimum to 5000+ GPM maximum

• Filtration Area: 0.78 ft² to 15.89 ft²

Each model uses silica sand and gravel media, ensuring consistent filtration performance across varying flow demands.

Industries That Benefit Most From SM-Series3 Sand Media Filters

While built for agriculture, the durability and removable underdrain design make these filters valuable across multiple industries:

1. Agriculture & Irrigation

The primary application, ideal for:

• Drip & micro-irrigation systems

• Sprinkler & pivot systems

• Filtration for orchards, vineyards, & row crops

• Protecting emitters from sediment, organics, & well debris

• Fertigation systems requiring clean, consistent flow

Growers benefit from low maintenance, long service life, and reliable performance in harsh outdoor conditions.

2. Greenhouses & Nurseries

Greenhouse water supply often contains organic material that clogs emitters. Sand media filtration provides:

• High-volume filtration

• Organic removal for clearer irrigation water

• Dependable operation with reclaimed or recycled water

The epoxy coatings and stainless steel underdrains help withstand fertilizer-rich environments.

3. Municipal & Landscape Irrigation

Parks, sports fields, and civic irrigation systems rely on sand filters to process:

• Lake water

• Canal water

• Reclaimed water, which often contains fine organic material

The SM-Series3 delivers continuous filtration with minimal service interruptions.

4. Industrial Water Reuse & Pre-Filtration

Before entering fine filtration systems such as membranes or cartridges, industrial water often needs a robust pre-filtration stage. Stainless underdrains and epoxy coatings make the SM-Series3 suitable for:

• Cooling tower makeup water

• Process water reuse

• Pre-filtration for desalination or RO systems

• Particulate removal from surface water

5. Aquaculture & Fisheries

Sand media filters are commonly used to maintain water clarity and reduce suspended solids. The removable stainless steel underdrain is ideal in wet, corrosive environments common to fish farms.

Why the Epoxy Removable Underdrain Design Matters

The combination of epoxy-coated steel tanks and removable stainless steel wedge wire underdrains creates a filter system that excels in:

• Serviceability: Easy access through the side manway & removable underdrain

• Strength: Steel & stainless components outperform PVC alternatives

• Corrosion resistance: Industrial-grade internal & external coatings

• Flow efficiency: Stainless wedge wire promotes consistent, unobstructed flow

• Longevity: Built to withstand aggressive conditions & high PSI levels

These features make the SM-Series3 one of the most robust, field-ready sand media filters available for agricultural irrigation and commercial water filtration.

A Filter Designed to Work as Hard as You Do

The SM-Series3 epoxy-coated sand media filter with a removable stainless wedge wire underdrain is built for operations that demand reliability, durability, and ease of maintenance. Its service-friendly design, rugged construction, and optimized flow characteristics make it a long-term asset for agricultural growers and industries that rely on high-volume, sediment-rich water.

Whether supporting crop production, greenhouse irrigation, industrial water pre-treatment, or landscape systems, this filter delivers powerful performance and uncompromising durability in the field.