Discount Water Filters and Air Filters at Discount Filter

When we protect your filter purchase with our No Worries Guarantee, we mean it!

No Worries...
  • Your filters are guaranteed to be the right fit!
  • Our products are price match guaranteed!
  • Our customer service team is guaranteed to answer your call!
  • You’re guaranteed to find expert help!

Learn more about our No Worries Guarantee

TW30-1810-50 Tier1 Reverse Osmosis Membrane

More Views

TW30-1810-50 Tier1 Reverse Osmosis Membrane

Save 16% (MSRP: $165.99)

Quick Overview

Fits Whirlpool WHER18 and UltraFilter 350, 450, 500, and 550 RO systems
5 1


The TW30-1810-50 reverse osmosis membrane by Tier1 is comparable to many other membranes by brands like Whirlpool, EcoWater, Sears, and Kenmore. This product fits in the UltraFilter 350, 450, 500, and 550 RO systems, and Whirlpool's WHER18. This membrane will remove dissolved solids and organic matter. Replace prefilters regularly to prolong membrane life up to 2 years.

  • Ships fast!
  • Fits Whirlpool WHER18 and UltraFilter RO systems
  • Reduces total dissolved solids (TDS) and organic matter


Package Qty 1
Manufacturer's Id TW30-1810-50
UPC 799932637681
Actual Size (in) 10-1/8 inches (length) x 2 inches (outside diameter)
Actual Size (cm) 25.80 x 5.08
Primary Filter Media Semi-Permeable Membrane
Operating Pressure (psi) 40 - 100
Operating Temperature (°F) 40 - 100
Operating Temperature (°C) 4.4 - 37.8
Color / Finish Blue / Black
Warranty Guarantee Unconditional Product Guarantee for Life of the Product


Reduces the following contaminants:

The TIER1-TW30-1810-50 is comparable with the following part numbers

7266186 TW301810-50
7267970 TW30181050
TW30-1810-50 TIER1-TW30-1810-50

Fits the Following Model Numbers

37233557 625.384750
625.385750 7267970
WHER18 7266186
UltraFilter 350 UltraFilter 450
UltraFilter 500 UltraFilter 550