4-Stage RO Drinking Water System w/ Permeate Pump — 90 GPD
SKU 45-0025Or 4 interest-free payments — see options at checkout.
- Founded 1985
- Built in Tempe AZ
- In-house membranes
- Lifetime support
The same 4-stage DWS-90 setup, with a permeate pump added to push tank pressure higher, improve product purity, and cut waste water. The permeate pump runs on waste-water pressure — no electricity required. If you want the best version of our standard drinking water system, this is it.
Features
- Permeate pump — increases tank pressure, improves product purity, reduces waste water
- Pump runs entirely on waste-water pressure (no power needed)
- SpectraPure 90 GPD RO membrane for excellent rejection
- 0.5 micron sediment pre-filter — high dirt-holding capacity
- 0.5 micron carbon block pre-filter — removes trihalomethanes, chloramine, pesticides, volatile chemicals, and 99.95% of giardia/cryptosporidium
- 60 cu in OCB granular activated carbon post-filter polishes taste before the faucet
- Auto shut-off (ASO) valve preserves membrane life
- 4-gallon pressurized storage tank with ball valve
- Long-reach, lead-free non-air-gap faucet
- Pressure gauge for system monitoring
Specs
- Production: 90 GPD at 60 psi, 77 °F
- Stages: sediment → carbon block → RO membrane → GAC post-filter, with permeate pump
- Tank: 4-gallon pressurized
- Faucet: long-reach non-air-gap, lead-free
- Power: none required — permeate pump is mechanical
- Included: feed adapter with valve, drain saddle, quick-connect fittings, tubing, filter wrench
- Warranty: 1 year
Related products
- Replacement cartridges: Drinking Water System Cartridge Replacement Kit
- Without permeate pump: DWS 90 GPD Drinking Water System
- Compact footprint version: MaxPure 90 GPD
- Browse all drinking water systems
Questions about filters, production rates, or membranes? Visit our Know Your Filters page or contact us.
Cleaner water for plants, pets, and people
Reverse osmosis membranes reject microplastics, PFAS and "forever chemicals," chlorine and chloramine byproducts, heavy metals, and the dissolved solids that show up as taste and scale. That means cleaner feed water for your plants, animals, business, or family — and a lot less reliance on bottled water, which keeps plastic out of the landfill. Most setups run a 3:1 waste-to-product ratio on hard water and 2:1 on soft water, and can be tuned to 1:1 in high-purity feed areas or with a periodic pure-water flush. The system is built to last with field-serviceable filter housings, so you replace cartridges (not whole units) for years of dependable purity.