Hydro Guard HDGT-45 50 GPD Four Stage RO System


The Hydro Guard HDGT-45 by Hydronix is a 4-stage RO System offers the filtration quality of a 5 stage RO system with only 4 simple twist and lock filters. The Hydro Guard HDGT-45 is easy to install and requires no tools to change filters, plus it features a 4.5 gallon storage tank. Added benefits include "Shok Blok"-- designed to protect the RO system from water pressure spikes; and "Flowlok"-- a unique compressed filter disc that expands on contact with water, acting as a leak detector to turn off the system when water is detected. The HDGT-45 offers 4 stage filtration that includes 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.



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

1 Year Replacement Filter Kits:

1-Year Filter Replacement Kit with 50 TFC GPD Membrane for Hydro Guard HDGT-45 RO (includes HDGT-TW50 RO membrane to be replaced every 24 months)*

1-Year Filter Replacement Kit for Hydro Guard HDGT-45 RO System (RO Membrane Sold Separately)*


PDF iconHydro Guard HDGT-45 4 Stage RO System Spec Sheet

PDF iconHydro Guard HDGT-45 Service Manual


>> Check out the Hydro Guard 4-Stage Reverse Osmosis Filtration System

>> Hydro Guard HDG-45 Review