Hydro Guard HDG-45 50 GPD Four Stage RO System


The Hydro Guard HDG-45 by Hydronix, is a 4-stage Reverse Osmosis drinking water system that offers the filtration quality of a 5-stage RO system with only 4 filters. The Hydro Guard HDG-45 is easy to install and features a 4.5 Gallon Storage Tank. Added benefits include Shok Blok - a system-wide protection valve designed to protect the RO system from water pressure spikes and water hammer; and Flowlok - a unique compressed filter disc that expands on contact with water, acting as a leak detector shut off valve to turn off the system when water is detected. The HDG-45 offers a drop in cartridge filter system allowing for simple replacements of the 4 stages that feature a 5 micron sediment pre-filter, a 5 micron carbon block, a 50 GPD RO Membrane, and a carbon post-filter. See the replacement kits below.


Hydro Guard HDGT-45 STAGES:

  • STAGE 1 – Sediment Pre-Filter (HDG-SED5) – Replace Every 12 Months
  • STAGE 2 – Carbon Block Pre-Filter (HDG-CB5) – Replace Every 12 Months
  • STAGE 3 – RO Membrane TFC 50 GPD (HDG-TW50) – Replace Every 24 Months
  • STAGE 4 – Carbon Post Filter (HDG-CB5P) – Replace Every 12 Months

1 Year Replacement Filter Kits:


PDF icon Hydro Guard HDG-45 4-Stage RO System Spec Sheet