Ultima Green RO 5 Compatible RO Replacement Filter Kit - Membrane Sold Separately
Description
Filter Replacement Kit for Ultima Green RO 5 Reverse Osmosis System (RO Membrane Sold Separately)
High-quality compatible filters included in Ultima Green RO 5 kit:
- STAGE 1 - 1x Sediment Pre-Filter (93023) - Replace every 6-12 months or as needed
- STAGE 2 - 1x Carbon Block Pre-Filter (OMB934-5M) - Replace every 6-12 months or as needed
- STAGE 3 - 1x Carbon Block Pre-Filter (OMB934-5M) - Replace every 6-12 months or as needed
- STAGE 4 - 0x Encapsulated RO Membrane GRO-50EN 50 GPD (4002574) - Replace every 24 months
- STAGE 5 - 1x Inline Carbon GAC Post Filter 2" x 10" (CL10ROT33-BB) - Replace every 6-12 months or as needed
We offer two replacement filter kits so you can get exactly what you need — and avoid paying for filters you don’t.
-
Year 1 Kit (Includes RO Membrane):
Ideal for your first full replacement, this kit includes all filters plus the RO membrane, which typically lasts up to 24 months. -
Year 2 Kit found on this page (Without RO Membrane):
After the first year, you only need to replace the pre- and post-filters, since the RO membrane is still good for another year. This kit helps you save money while keeping your system performing like new.
By offering two kits, we make it easy to follow the recommended replacement schedule and reduce waste — so you only buy what your system truly needs.
*Filters may need to be replaced more often than indicated, depending on water contaminant levels and volume of water being treated.
Replacements & Add Ons
Q:
What are some of the benefits and features of the Hydro Guard Reverse Osmosis under-sink system?
A:
Super Quiet: No constant gurgling and hissing.
Delicious: Fresh, delicious drinking water right at the kitchen sink. Your household may drink more water when they have filtered, great-tasting water.
Quick Connect and Simple: The Hydro Guard system was made with simplicity in mind. The "Quick and Easy" cartridges make filter changes simple with NO tools required.
Easy Installation: The quick connectors make connecting the tubing to all the RO system parts super simple.
Peace of Mind: The Hydro Guard comes with a FLOWLOK leak detector water shut off valve. This gives peace of mind because if the system ever begins to leak--before you have a big mess under the sink, the FLOWLOK will shut the system off.
Designer lead-free faucet: System comes with a durable, great-looking faucet.
System is made with NSF certified materials: NSF International is one of the most respected independent certification organizations which rigorously tests products to comply with all standard requirements.
Q:
How do I order replacement filters for my Hydro Guard RO drinking water filtration system?
A:
Start by clicking on the photo of your Hydro Guard system above. From there, you can add the needed filters to your cart. Filters can be ordered individually or as a "filter kit" to save you time. Keep in mind that the RO membrane usually only needs to be replaced every two years, while the sediment and carbon filters are replaced every 6-12 months depending on water usage and water quality. For this reason, you will see two different filter kits. One includes the membrane, and the other is all the filters without the membrane for year two.
While you're on the product page, you'll notice the available spec sheet and owner's manual with instructions on how to change out the Hydro Guard filters.
Q:
How much filtered water can the Hydro Guard Reverse Osmosis System produce in one day?
A:
The Hydro Guard reverse osmosis water filter system produces up to 50 gallons of filtered drinking water each day.
Q:
What contaminants will Hydro Guard RO systems remove?
A:
Hydro Guard reverse osmosis filters and membrane can remove common pollutants from water including lead, pesticides, sulfates, fluoride, nitrates, pharmaceuticals, arsenic, and much more. The RO system's carbon filter will also remove chloramines and chlorine.
Learn more about what contaminants can be removed with reverse osmosis filtration.
Q:
What replacement filters do I need for the Hydro Guard HDGT-45 50 GPD RO system?
A:
The HDGT-45 uses a standard 4-stage set: sediment prefilter, carbon block prefilter, 50 GPD RO membrane, and a post-carbon polishing filter. Always match the filter size and connection style to ensure compatibility.
Q:
How often should I replace Hydro Guard HDGT-45 RO filters?
A:
Most HDGT-45 sediment and carbon prefilters should be replaced every 6–12 months, the post filter annually, and the RO membrane every 2–3 years, depending on water quality and household usage.
Q:
How do I know when the HDGT-45 RO filters need to be changed?
A:
Reduced flow, flat taste, chlorine odor, or higher TDS readings often indicate that the HDGT-45 filters or membrane are nearing the end of their life and should be replaced.
Q:
Are Hydro Guard HDGT-45 replacement filters standard-size or proprietary?
A:
The HDGT-45 typically uses standard 10" prefilters and industry-standard membrane sizing, but always confirm dimensions and fittings since RO systems can vary by production year or configuration.
Q:
Why is my HDGT-45 system producing low water flow after changing the filters?
A:
Low flow (or slow water flow)may be caused by trapped air, incorrect filter seating, a clogged prefilter, or an aging RO membrane. Flush the system fully and confirm each filter is installed in the correct stage.
Q:
Do I need to replace the HDGT-45 O-rings or other RO system parts during filter changes?
A:
O-rings should be inspected during each filter change and replaced if worn, cracked, or dry. Lubricate them with food-grade silicone to maintain a proper seal. We also recommend sanitizing the RO system annually when swapping filters; see the guide on how to sanitize a reverse osmosis system.
