Growonix EX400 Reverse Osmosis Filter 400 GPD w/ KDF

Growonix EX400 Reverse Osmosis System for 400 GPD

The Growonix EX400 produces 400 GPD of near-zero-ppm water and flows about 17 gallons per hour at a 2:1 ratio. It is built with dual o-ring fittings and a steel pressure gauge, so you can read system pressure at a glance. A manual flush valve lets you purge salts off the membrane. Flush it for 3 to 5 minutes after each use, and the membrane lasts much longer. Recovery runs at 33% and can be dialed back for lower-quality feed water.

Upgraded KDF85 Carbon Filter, Built Booster-Ready

This unit ships with the upgraded KDF85 carbon filter. On city water it cuts chlorine and chloramine. On well water it pulls down iron, hydrogen sulfide, and heavy metals that wreck membranes. The KDF85 stage lasts about twice as long as the standard green carbon, and its bacteriostatic media stops microbes from breeding inside. Need more output in winter or on low pressure? Add a BP-1530 booster pump to reach 80 PSI and push up to 450 GPD. Higher TDS or colder water will lower production.

Key Features

• 400 GPD output: Flows 17 gallons per hour of near-zero-ppm RO water at a 2:1 ratio.
• Upgraded KDF85 carbon filter: Reduces chlorine, chloramine, iron, hydrogen sulfide, and heavy metals.
• Longer-lasting carbon: KDF85 stage lasts about twice as long as the standard green carbon filter.
• Bacteriostatic media: Stops microbes from breeding inside the carbon stage.
• Manual flush valve: Purges salts off the membrane to extend its life.
• Steel pressure gauge: Reads system pressure so you can track performance and filter condition.
• Dual o-ring fittings: Tight, reliable connections across the housing.
• Booster-ready: Pairs with a BP-1530 booster pump to hit 80 PSI and up to 450 GPD.
• Wide operating range: Runs at 40–105°F, pH 3–11, and 40–80 PSI feed pressure.
• Compact build: 14 x 7 x 21 in, 20 lbs, with 8,000-gallon carbon capacity.

Technical Specifications