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Whole House Reverse Osmosis System by Tier1- Everyday Series (350 GPD)

Price $899.00 List Price Price $1,099.00 Save 18%
Availability: Discontinued - Free Shipping
Fits most standard water lines. System includes 3/8 inch fittings.

This item has important return policy exclusions. Please review our Returns and Exchanges Policy.

  • Automatic shut-off valve
  • Push and pull fittings with locking safety clips
  • Use alone or as part of a larger Tier1 Whole House Solutions configuration
  • The slim line filter housings fit most standard 20 inch sediment and carbon filters
See more product details
The WH-RO-350 Whole House Reverse Osmosis System by Tier1 is the ideal a pump-less solution for on-demand filtered water. The 4-stage system can be free-standing, or wall-mounted to minimize its footprint. The system arrives complete with a membrane element and housing, a 5-micron sediment pre-filter, and two 10 micron carbon blocks for pre-filtration and post-filtration. The 4-stages of reverse osmosis filtration provide among the purest water available.

Don't forget the Tank!

Due to the Reverse Osmosis filtration process, the water flow rate is reduced. To effectively utilize this system for whole house filtration, it must be paired with a water holding tank. On account of the varying water holding capacity needs, the tank must be purchased separately, ensuring you are able to select the size that fits your needs.

Reverse Osmosis

Reverse Osmosis is the process of forcing water through a semi-permeable membrane, which allows water molecules to pass, but captures water-soluble toxins, such as heavy metals, organics, bacteria, and pyrogens. Reverse Osmosis captures a significant percentage of high toxic impurities, such as asbestos, hexavalent chromium, and lead

Sediment and Carbon Filtration

Sediment Filtration:
The Sediment Pre-filtration process reduces physical particles, such as sand, rust, silt, soil, and more! This helps extend the life of home appliances, as well as improves your drinking water.

Carbon Filtration:
The Carbon Filtration process has two steps, Carbon Pre-filtration and Carbon Post Filtration. Carbon Pre-filtration reduces the presence of chlorine taste and odor, as well as the presence of dangerous chemicals in the water. Carbon Post Filtration is the last step of the filtration process, which allows for the polishing of the water's aesthetic and taste. The water molecules' passes through the semi-permeable membrane; At this point, the water molecules have been freed from contaminates and impurities down to 5 microns during the pre-filtration phases and heavy metals, organics and bacteria have been reduced during the reverse osmosis phase.

Experience the Tier1 Difference

Tier1 manufactures high-quality filtration and household products. We take creating and maintaining a healthy home seriously. Products must undergo rigorous testing and meet demanding quality expectations in order to earn the Tier1 badge. Every purchase is backed by the Tier1® Guarantee:

  • Guaranteed Fit
  • Guaranteed Quality
  • Guaranteed Price
Package Qty1
Used In BrandsTier1
Manufacturer's IdWH-RO-350
Actual Size (in)12 inches (length) x 17 inches (width) x 32 inches (height)
Actual Size (cm)30.48 x 43.18 x 81.28
Primary Filter MediaSemi-Permeable Membrane
Pre Filter MediaCarbon Block
Post Filter MediaCarbon Block
Micron Rating (Nominal)5
Operating Pressure (psi)0 - 100
Maximum Operating Pressure (psi)90
Operating Temperature (°F)40 - 85
Operating Temperature (°C)4.4 - 29.4
Flow Rate (gpm)0.24
Flow Rate (lpm)81.28
Flow Rate (gpd)350
Fitting TypeQuick Connect
Fitting Size (inches)3/8 inch
Warranty GuaranteeTier1® Whole House Systems: Protect Every Drop Guarantee
Primary Filter MediaSemi-Permeable Membrane

Reduced Contaminants

The TIER1-WH-RO-350 reduces the following contaminants:

  • Barium
  • Cadmium
  • Chlorine Taste & Odor
  • Chromium (III / Trivalent)
  • Chromium (VI / Hexavalent)
  • Copper
  • Fluoride
  • Lead
  • Mercury
  • Nitrates / Nitrites
  • Selenium
  • Silt
  • Total Dissolved Solids (TDS)
  • Turbidity

Installation Guide

User Guide


  1. For installation instructions please read the RO System Installation Guide
  2. For additional information on the Tier1 reverse osmosis system please see the RO System Spec Sheet