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Filmtec (TW30-4040) Tap Water Membrane 2,400 GPD @ 4" X 40"

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Filmtec (TW30-4040) Tap Water Membrane 2,400 GPD @ 4" X 40"

The Filmtec TW30-4040 is the industry standard commercial reverse osmosis membrane, delivering 2,400 gallons per day with 99.5% salt rejection in a proven 4" x 40" format. Built with a robust 34 mil feed spacer and cleanable across pH 1-13, this tape-wrapped element offers the same high-quality membrane technology as Dow's industrial line at a price point suited for smaller commercial installations.
SPECIFICATIONS

Filmtec TW30-4040 Technical Details

Model Number TW30-4040
Dimensions 4 inches × 40 inches
Active Membrane Area 78 ft² (7.2 m²)
Permeate Flow Rate 2,400 GPD (9.1 m³/d)
Salt Rejection 99.5% (stabilized)
Feed Spacer Thickness 34 mil (thickest in class)
pH Cleaning Range 1-13
Test Conditions 2000 ppm NaCl, 225 psi, 77°F, 15% recovery
INSTALLATION & USE

Installing Your TW30-4040 Membrane

  1. Flush the RO housing thoroughly with clean water before inserting the membrane element to remove any manufacturing debris or contaminants.
  2. Lubricate the brine seal and o-rings with clean water or glycerin, then slide the Filmtec TW30-4040 membrane into the pressure vessel with the brine seal end facing the concentrate port.
  3. Install end caps per your housing manufacturer's instructions, ensuring proper seal compression to prevent bypass.
  4. Start system at low pressure and gradually increase to operating pressure over 30-60 seconds, then flush permeate to drain for the first 30 minutes of operation.
  5. Monitor initial permeate TDS and flow rate, allowing 24-48 hours for the membrane to fully stabilize before making performance adjustments.
COMPATIBILITY

System Requirements & Applications

The Filmtec TW30-4040 is designed for tap water and low-fouling municipal feed sources with SDI less than 5. Compatible with standard 4-inch commercial housings rated for up to 300 psi, this membrane works in single or dual-element configurations for restaurants, offices, light industrial, aquarium systems, and other commercial applications requiring high-purity water. Not recommended for high-fouling water, brackish well water with elevated TDS, or seawater applications without consulting Dow's technical guidelines. Individual element flow may vary ±20% from nominal specifications.

🔧 Pro Tip: The 34 mil feed spacer makes the TW30-4040 more forgiving than thin-channel membranes, but don't skip proper pretreatment. A 5-micron sediment filter and carbon block upstream will dramatically extend membrane life and maintain that 99.5% rejection rate between cleanings.
The Filmtec TW30-4040 is the industry standard commercial reverse osmosis membrane, delivering 2,400 gallons per day with 99.5% salt rejection in a proven 4" x 40" format. Built with a robust 34 mil feed spacer and cleanable across pH 1-13, this tape-wrapped element offers the same high-quality membrane technology as Dow's industrial line at a price point suited for smaller commercial installations.
SPECIFICATIONS

Filmtec TW30-4040 Technical Details

Model Number TW30-4040
Dimensions 4 inches × 40 inches
Active Membrane Area 78 ft² (7.2 m²)
Permeate Flow Rate 2,400 GPD (9.1 m³/d)
Salt Rejection 99.5% (stabilized)
Feed Spacer Thickness 34 mil (thickest in class)
pH Cleaning Range 1-13
Test Conditions 2000 ppm NaCl, 225 psi, 77°F, 15% recovery
INSTALLATION & USE

Installing Your TW30-4040 Membrane

  1. Flush the RO housing thoroughly with clean water before inserting the membrane element to remove any manufacturing debris or contaminants.
  2. Lubricate the brine seal and o-rings with clean water or glycerin, then slide the Filmtec TW30-4040 membrane into the pressure vessel with the brine seal end facing the concentrate port.
  3. Install end caps per your housing manufacturer's instructions, ensuring proper seal compression to prevent bypass.
  4. Start system at low pressure and gradually increase to operating pressure over 30-60 seconds, then flush permeate to drain for the first 30 minutes of operation.
  5. Monitor initial permeate TDS and flow rate, allowing 24-48 hours for the membrane to fully stabilize before making performance adjustments.
COMPATIBILITY

System Requirements & Applications

The Filmtec TW30-4040 is designed for tap water and low-fouling municipal feed sources with SDI less than 5. Compatible with standard 4-inch commercial housings rated for up to 300 psi, this membrane works in single or dual-element configurations for restaurants, offices, light industrial, aquarium systems, and other commercial applications requiring high-purity water. Not recommended for high-fouling water, brackish well water with elevated TDS, or seawater applications without consulting Dow's technical guidelines. Individual element flow may vary ±20% from nominal specifications.

🔧 Pro Tip: The 34 mil feed spacer makes the TW30-4040 more forgiving than thin-channel membranes, but don't skip proper pretreatment. A 5-micron sediment filter and carbon block upstream will dramatically extend membrane life and maintain that 99.5% rejection rate between cleanings.
$157.15

Original: $449.00

-65%
Filmtec (TW30-4040) Tap Water Membrane 2,400 GPD @ 4" X 40"

$449.00

$157.15

Description

The Filmtec TW30-4040 is the industry standard commercial reverse osmosis membrane, delivering 2,400 gallons per day with 99.5% salt rejection in a proven 4" x 40" format. Built with a robust 34 mil feed spacer and cleanable across pH 1-13, this tape-wrapped element offers the same high-quality membrane technology as Dow's industrial line at a price point suited for smaller commercial installations.
SPECIFICATIONS

Filmtec TW30-4040 Technical Details

Model Number TW30-4040
Dimensions 4 inches × 40 inches
Active Membrane Area 78 ft² (7.2 m²)
Permeate Flow Rate 2,400 GPD (9.1 m³/d)
Salt Rejection 99.5% (stabilized)
Feed Spacer Thickness 34 mil (thickest in class)
pH Cleaning Range 1-13
Test Conditions 2000 ppm NaCl, 225 psi, 77°F, 15% recovery
INSTALLATION & USE

Installing Your TW30-4040 Membrane

  1. Flush the RO housing thoroughly with clean water before inserting the membrane element to remove any manufacturing debris or contaminants.
  2. Lubricate the brine seal and o-rings with clean water or glycerin, then slide the Filmtec TW30-4040 membrane into the pressure vessel with the brine seal end facing the concentrate port.
  3. Install end caps per your housing manufacturer's instructions, ensuring proper seal compression to prevent bypass.
  4. Start system at low pressure and gradually increase to operating pressure over 30-60 seconds, then flush permeate to drain for the first 30 minutes of operation.
  5. Monitor initial permeate TDS and flow rate, allowing 24-48 hours for the membrane to fully stabilize before making performance adjustments.
COMPATIBILITY

System Requirements & Applications

The Filmtec TW30-4040 is designed for tap water and low-fouling municipal feed sources with SDI less than 5. Compatible with standard 4-inch commercial housings rated for up to 300 psi, this membrane works in single or dual-element configurations for restaurants, offices, light industrial, aquarium systems, and other commercial applications requiring high-purity water. Not recommended for high-fouling water, brackish well water with elevated TDS, or seawater applications without consulting Dow's technical guidelines. Individual element flow may vary ±20% from nominal specifications.

🔧 Pro Tip: The 34 mil feed spacer makes the TW30-4040 more forgiving than thin-channel membranes, but don't skip proper pretreatment. A 5-micron sediment filter and carbon block upstream will dramatically extend membrane life and maintain that 99.5% rejection rate between cleanings.

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Filmtec (TW30-4040) Tap Water Membrane 2,400 GPD @ 4" X 40" | Isopure Water