
We carry a wide range of parts to service and maintain your existing reverse osmosis system. If you can't find what your looking for, or are unsure of what you need, give us a call and one of our highly trained experts will help find what you are looking for.
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DM-2 HM Digital Commercial In-Line Dual TDS Monitor - 1/2" Tee Fittings
Install on industrial systems such as car washes, window washing, manufacturing, and food processing. Features Highly efficient and accurate due to its advanced microprocessor technology. Displays TDS levels of the Feed Water and Product Water with in & out electrode probes. Auto-Off function conserves...- $69.95
$78.69- $69.95
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John Guest Quick Connect 1/4” x 1/4” NPTF Female Adapter - PP450822E
John Guest Quick Connect Fitting 1/4” x 1/4” NPTF Female Adapter Black - PP450822E Part Number: PP450822E Pure and simple water purification John Guest fittings are suitable for domestic water or for commercial systems, we offer John Guest Fittings which are ideal for filtering,...- $4.91
$6.14- $4.91
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HM Digital Commercial In-Line Dual EC Monitor with 3/8" Tee Fittings | DM-2EC
Inline conductivity meter that can be used on commercial water treatment systems such as car washes, window washing, manufacturing, and food processing. Features Highly efficient and accurate due to its advanced microprocessor technology. Displays EC levels of the Feed Water and Product Water with...- $69.95
$74.94- $69.95
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John Guest 1/2" Stem x 1/2" Barb Fitting | PP051624W
John Guest 1/2" Stem x 1/2" Barb Fitting Part Number: PP251616W This fitting is made of the following components: The body is produced in polypropylene (polypro) 'O'Rings are EPDM The collet is produced in polypropylene with stainless steel teeth Quantity Discounts Available - Call...- $3.97
$4.96- $3.97
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4 Stage Countertop System Filter Pack
Replacement filters for the CT-445 Countertop Reverse Osmosis System Includes: STAGE 1 - 5-Micron Sediment Filter: Reduces dirt, Sand, and Rust STAGE 2 - Carbon Pre-Filter Filter: Reduces Chlorine Taste and Odors STAGE 4 - Carbon Final Polishing Filter Enhances the Taste of the...- $54.95
$81.81- $54.95
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US Water Single 2.5 x 20 Inch Remineralization Filter Kit with Mounting Bracket - 1/4"
US Water 2.5" x 20" Re-Mineralization Filter - 1/4" Calcite is naturally occurring calcium carbonate media. Upon contact with acidic waters, calcite slowly dissolves and the calcium carbonate raises the pH, which reduces potential leaching of copper, lead and other metals found in typical...- $53.95
$98.19- $53.95
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US Water PurEdge5 Five-Stage Drinking Water Purification System Filter Pack
Our 5-Stage Filter Pack for the PurEdge5 Five-Stage Drinking Water Purification System includes silicone to lubricate the O-Rings and RO Sanitizing Solution, so that you can trust your water to be as clean as it can be.Includes (1) Interceptor PAC Filter (1) Chloramine Carbon...- $111.95
$139.94- $111.95
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John Guest Quick Connect 3/8” OD Stem x 1/2” ID Barb - PP251216W
John Guest Quick Connect Fitting 3/8” OD Stem x 1/2” ID Barb White - PP251216W Part Number: PP251216W Pure and simple water purification John Guest fittings are suitable for domestic water or for commercial systems, we offer John Guest Fittings which are ideal for...- $2.99
$3.74- $2.99
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John Quest Quick Connect 1/2" Inlet x 3/8" Three Way Divider
John Quest Quick Connect 1/2" Inlet x 3/8" Three Way Divider Connector Part Number: PI491612S This fitting is made of the following components: The body is produced in polypropylene (polypro) 'O'Rings are EPDM The collet is produced in polypropylene with stainless steel teeth Quantity...- $13.15
$16.44- $13.15
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AvantaPure Deluxe APPRO-50 Reverse Osmosis Filter Pack
AvantaPure Deluxe APPRO-50 Reverse Osmosis Filter Pack Replacement Filter Pack for AvantaPure Deluxe APPRO-50 5-Stage Reverse Osmosis System like the one pictured to the right All Filters are Made in the USA NSF Certified Includes (1) 5 Micron Pre-Filter (2) Carbon Block Pre-Filters (1)...- $49.95
$90.91- $49.95
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HM Digital QC-1 Quick Check TDS Monitor
HM Digital QC-1 Quick Check TDS Monitor Features With the push of a button, the unit displays a green or red light, indicating good water quality or service required, respectively. Tests for TDS levels. Eight programmable set points (by dip switch). Bright LED lights....- $29.95
$16.25- $29.95
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Axeon 6 Stage Reverse Osmosis Filter Pack
Replacement Filter Pack for Axeon 6 Stage Reverse Osmosis Systems Axeon formerly named RO Ultra Tech has been in the water treatment marketplace over 30 years. US Water Systems offers quality USA manufactured compatible filters at a cost savings that will meet or exceed...- $49.95
$90.91- $49.95
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Aqua-Pure LP Reverse Osmosis Filter Pack
Replacement Filter Pack for Aqua-Pure LP 4-Stage Reverse Osmosis System All Filters are Made in the USA NSF Certified for Aqua-Pure High Purity Reverse Osmosis Systems Fits LP Includes (1) 5 Micron Pre-Filter NSF 61 (AP110) (2) Carbon Block Pre-Filter NSF 42 (AP410RO) (1)...- $44.95
$81.81- $44.95
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Watts FMRO4 Reverse Osmosis Filters
Watts FMRO4 Reverse Osmosis Filter Pack Watts Water Technologies, Inc. is a supplier of products and solutions that manage and conserve the flow of fluids and energy into, through and out of buildings in the residential and commercial markets. The Company, through its subsidiary,...- $44.95
$81.81- $44.95
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All American Reverse Osmosis Auto-Shutoff Valve | ASOV-14QB
Frequently called ASO - Easy to use 1/4" Quick Connect Fittings The ASO is clearly marked for ease of installation. The valve automatically shuts off production when the tank pressure reaches approximately 65% of the incoming line pressure. Fits practically any RO system. 1/4"...- $19.95
$33.25- $19.95
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Topway Global TGI-WIN-645UP Reverse Osmosis Filter Pack
Replacement Filter Pack for TGI Pure Model TGI-WIN-645UP 5-Stage Reverse Osmosis System Topway Global, established in 1993, manufactured a wide variety of water softeners, point-of-entry filter units and point-of-use drinking water systems for residential, commercial, and industrial applications. In 2007 Watts Water Technologies acquired...- $59.95
$90.91- $59.95
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1/2" x 3/8" John Guest Quick Connect Reducing Elbow
John Guest 1/2" x 3/8" John Guest Quick Connect Reducing Elbow Fitting Part Number: PP211612W This fitting is made of the following components: The body is produced in polypropylene (polypro) 'O'Rings are EPDM The collet is produced in polypropylene with stainless steel teeth Quantity...- $7.02
$8.78- $7.02
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John Guest Quick Connect 1/2" Bulkhead Fitting
John Guest Quick Connect 1/2" Bulkhead FittingPart Number: PP1216W This fitting is made of the following components: The body is produced in polypropylene (polypro) 'O'Rings are EPDM The collet is produced in polypropylene with stainless steel teeth Quantity Discounts Available - Call for Prices...- $11.61
$14.51- $11.61
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John Guest Quick Connect Fitting 3/8” End Stop Connector - PI4612S
John Guest Quick Connect Fitting 3/8” End Stop Connector - PI4612S Part Number: PI4612S Pure and simple water purification John Guest fittings are suitable for domestic water or for commercial systems, we offer John Guest Fittings which are ideal for filtering, reverse osmosis, cleaning,...- $1.71
$2.14- $1.71
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Topway Global TGI-WIN-415 Reverse Osmosis Filter Pack | FP4-1
Replacement Filter Pack for TGI Pure Model TGI-415 4-Stage Reverse Osmosis System like the one pictured Topway Global, established in 1993, manufactured a wide variety of water softeners, point-of-entry filter units and point-of-use drinking water systems for residential, commercial, and industrial applications. In 2007...- $54.95
$81.81- $54.95
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Installation
Installation of a reverse osmosis system can be performed by almost anyone. If you are a little technically inclined, you can most likely install a system yourself. The process may vary slightly depending on your setup and which system you ordered. For the most part, everything you need for installation is provided with the system. The tools you may need to supply yourself are as follows:
- Drill
- 1/4" Drill Bit
- Faucet Drill Bit (size will vary depending on faucet type)
- Philips Head Screwdriver
- Tubing Cutter or Razor Knife
- Channel Lock Pliers
- Adjustable Wrench
To get a preview of installation for an RO system, check out our DIY installation video here!
Maintenance
Sanitization
It recommended that you sanitize your RO system each time you change your filters (every 6 months depending on water quality). To sanitize your system, we recommend the use of Sani-System for RO Systems by Pro Products. The sanitation process itself takes 60 seconds of contact time. We provide a single use sanitizing packet with each of our reverse osmosis filter packs.

Repairing a Broken Fitting
Occasionally due to shipment or installation, RO fittings can break or leak. For this reason, we supply a spare elbow fitting with every RO unit. If your fitting breaks, you can use this extra fitting to repair your system in under 2 minutes.
Re-Pressurizing an RO Tank
Over time, the RO tank can lose pressure and you could begin to experience some problems. Tanks can be re-pressurized using a tire pressure gauge, and a bike pump or air compressor. The target pressure for our small residential RO systems is typically between 5-7 psi.
Replacement Filters
US Water Systems has more replacement filter packs than any other water treatment site. If you have an RO system, chances are we have replacement filters for your system. Buying a filter pack is fool-proof. Not only do you get all necessary filters for your system, but you also receive sanitation solution to make sure your first glass of water is as pure as it can be.
