Cobalt Hollow
Cobalt Hollow
CrystalFlow

CrystalFlow™under sink water filter

$239.99

  • Full flow filtered water with zero waste
  • Rich mineral taste without the chlorine bite
  • Blocks bacteria and rust to 0.01 microns
  • Set up in minutes with no tools required

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Baby Healthcare & Grooming Kit

FREE$24.99
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  • Connect CrystalFlow to your cold water line in minutes using the included fittings, no plumber needed.
  • Water passes through the pre-filter, then the ultrafiltration membrane and resin filter to strip out sediment, rust, chlorine and bacteria.
  • Naturally occurring minerals stay in, so every glass comes out instant, great-tasting and ready with no storage tank.
  • CrystalFlow Water Filter System
  • 1/4 inch and 3/8 inch PE tubing
  • Faucet gasket and hanging piece
  • Three-way ball valve
  • Feed strip and screw set
  • Quality certificate

We offer free shipping on orders over $150. Once your order is dispatched, the estimated delivery time is 5 to 12 business days depending on your location — tracking is emailed as soon as it ships.

Changed your mind? You can return your product within 90 days of delivery for a refund — see our Returns page for the full policy.

Why CrystalFlow Outperforms Ordinary Filters

304 Stainless Steel Housing

304-grade stainless steel resists rust and cracking, so it won't leak and ruin your cabinet floor like standard plastic housings.

Zero Water Waste Design

Reverse osmosis systems waste gallons of water to filter one. CrystalFlow's ultrafiltration wastes none of it.

CrystalFlow

LED Filter Life Monitor

A built-in LED display tracks filter life and system performance in real time. Know exactly when it's time for a replacement, no guesswork needed.

No Electricity Needed

Operate without any power source, no outlet or wiring required near your sink. Get pure filtered water on tap even if the power goes out.

Frequently Asked Questions

The pre-filter typically lasts 3 to 6 months, while the ultrafiltration membrane and resin filter can last up to 24 months, depending on your local water quality.

Unlike RO systems, CrystalFlow needs no storage tank and wastes zero water while filtering, so every drop reaches your glass. It also keeps beneficial minerals in your water instead of stripping them out for a flat taste.

Absolutely. Every fitting you need is included, along with a simple guide, so you can have it set up under your sink or on the wall in minutes.

CrystalFlow's pre-filter stage is built for everyday sediment in municipal water, and most city users see a big improvement fast. On well water with heavy sediment or iron, pair it with an external pre-filter for best results.

Not at all. CrystalFlow's high-flow engineering keeps your tap pressure strong, so you get purified water without any noticeable drop in flow.

CrystalFlow's built-in LED display monitors filter life and lights up when it's time for a change, so there's no guesswork or countdown to track yourself. Just replace the cartridge when the light signals and you're back to full performance.

No. CrystalFlow's 304-grade stainless steel housing is built to resist corrosion, so you get lasting durability and safety for years to come.

It removes up to 99.95% of sediment, rust, chlorine, and bacteria, all while preserving the essential minerals your body needs.

The CrystalFlow under sink water filter kit includes the system, 1/4 inch and 3/8 inch PE tubing, a faucet gasket and hanging piece, a three-way ball valve, and a feed strip and screw set.

No. This under sink water filter operates without any power source, so no outlet or wiring is needed near the sink. It connects to the cold water line and does not use a storage tank.
CrystalFlow

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Get CrystalFlow at today's price with your free gift included — and a full 90 days to enjoy it.

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CrystalFlow: An Under Sink Water Filter in 304 Stainless Steel

CrystalFlow is an under sink water filter that connects to the cold water line and passes tap water through a pre-filter, an ultrafiltration membrane and a resin filter. It does not use a storage tank.

The housing is 304 stainless steel. A built-in LED display tracks filter life, and the system operates without electricity, so no outlet or wiring is required near the sink. As an under sink water filtration system, it can be mounted under the sink or on the wall.

  • Pre-filter, ultrafiltration membrane and resin filter stages
  • LED display for filter life
  • 1/4 inch and 3/8 inch PE tubing
  • Three-way ball valve, faucet gasket and hanging piece
  • Feed strip and screw set

Sold as a water filter for sink use, it comes with the tubing, valve and fittings needed for connection.

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