Reverse Osmosis Parts for Standard RO Systems
Shutoff valves, John Guest and Jaco Fittings, RO Tanks, Faucets, Filter Housings, Filter and Membrane Mounting Brackets, RO Tank Valves, Drain Saddles, Inlet Saddle Valves, Filter Wrenches, TDS Tester, Tubing, Flow Restrictors and much, much more.
Quick Alphabetical Index
Fix-It-Yourself Reverse Osmosis Parts & Pieces List
Call or email if you need help or have questions.
Note: For RO Membranes and Cartridges, go to our Cartridge Menu.
Shipping: For UPS Ground Shipments and USPS First Class Mail to the Continental United States, we pay all shipping charges. On small orders for small parts, we often ship regular First Class Mail. Please include an address that works with the U.S. Postal Service. We reserve the right to choose the shipping method on free shipping.
Housings & Brackets
Shutoff Valves
More about Reverse Osmosis Shutoff Valves
| Part # | Description | Price | ||
|---|---|---|---|---|
| RC301 |
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Payne Automatic Shutoff Valve (Jaco-style fittings, nuts included) Horseshoe flow pattern with In/Out on one side and Tank/Tank on the other. | $15.00 | 
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| RC300 |
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Payne Automatic Shutoff Valve (John Guest-style fittings). Horseshoe flow pattern with In/Out on one side and Tank/Tank on the other. | $18.00 |
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| RC304 |
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Flowmatic Automatic Shutoff Valve (Jaco-Style fittings with nuts included). Has straight-through flow pattern. | $15.00 |
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| RC303 |
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Flowmatic Automatic Shutoff Valve (John Guest-style fittings). Has straight-through flow pattern. | $16.00 |
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Fittings, Tubing & Accessories
More about Tubing and Fittings
| Part # | Description | Price | ||
|---|---|---|---|---|
| JG033 |
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John Guest Fixed Elbow, 1/4" male pipe thread X 1/4" tube. Fits filter housings, but not membrane housings. Can also be used for inline post filters. | $3.05 |
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| JG032 |
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John Guest Fixed Elbow, 1/8" male pipe thread X 1/4" tube. Fits membrane housings. | $2.70 |
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| JG002 |
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John Guest Fixed Connector, 1/4" Pipe X 1/4" Tube. Fits filter housings and inline postfilters. | $1.95 |
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| JG001 |
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John Guest Fixed Connector, 1/8" Male Pipe thread X 1/4" Tube. Fits membrane housings. Makes a straight connection rather than an elbow. | $1.75 |
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| JG011 |
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John Guest 1/4" Tube Tee. Connects three 1/4" tubes. | $3.85 |
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| JG012 |
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John Guest 3/8" Tube Tee. Connects three 3/8" tubes. | $4.70 |
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| JG022 |
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John Guest 1/4" Plug-In Elbow. Plugs into a straight 1/4" JG fitting to make a swiveling elbow. A handy gadget to have. | $2.75 |
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| JG024 |
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John Guest 3/8" Plug-In Elbow. Plugs into a straight 3/8" JG fitting to make a swiveling elbow. | $4.60 |
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See all of our John Guest fittings here! |
| JG024 |
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John Guest 3/8" Plug-In Elbow. Plugs into a straight 3/8" JG fitting to make a swiveling elbow. | $4.60 |
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| FT033 |
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Jaco Fixed Elbow, 1/4" male pipe thread by 1/4" tube. This fits most filter vessels (but not membrane housings). Can also be used for inline post filters. | $1.50 |
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| FT032 |
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Jaco Fixed Elbow, 1/8" male pipe thread by 1/4" tube. This fits most membrane housings (but not filter vessels). | $1.50 |
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| FT002 |
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Jaco Fixed Connector, 1/4" Male Pipe Thread X 1/4" Tube. Fits filter housings and inline filters. | $1.75 |
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| FT011 |
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Jaco 1/4" Tube Tee. Connects three 1/4" tubes. | $1.75 |
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| FT012 |
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Jaco 3/8" Tube Tee. Connects three 3/8" tubes. | $4.50 |
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| FT045 |
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Jaco 1/4" Male Run Tee. Connects two 1/4" tubes to a 1'4" fixed female pipe thread. (Commonly used to connect tank and permeate lines to inlet of inline post filter.) | $2.70 |
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| TB001 |
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1/4" Polyethylene Tubing. NSF Standard 51/61 Certified. John Guest Brand. If you don’t specify, you’ll get white. If you ask, you may substitute black, red, yellow, or orange. Sorry, we no longer stock olive drab. | $0.15 (per foot) |
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| TB002 |
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3/8" Polyethylene Tubing. NSF Standard 51/61 Certified. John Guest Brand. If you don’t specify, you’ll get white. If you ask, you may substitute black. | $0.25 (per foot) |
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| TB100 |
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Tube inserts for 1/4" Tubing. Must use with Jaco fittings. Do not use with John Guest fittings. |
$0.10 |
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| TB101 |
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Tube inserts for 3/8" Tubing. Must use with Jaco fittings. Do not use with John Guest fittings. |
$0.10 |
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Mounting Clips
| Part # | Description | Price | ||
|---|---|---|---|---|
| RC208 |
|
Membrane Clip. Attaches membrane housing to the filter bracket. Most RO units use two membrane clips. | $2.00 |
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| RC200 |
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Filter-to-Membrane Clips. Attach standard 10" or 6" post filters to the membrane housing. Two clips are normally used for a filter. A single clip will attach a Payne shutoff valve (see above) to the membrane housing. | $2.00 |
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Tanks & Tank-Valves
More About Tanks and Tank Valves
| Part # | Description | Price | ||
|---|---|---|---|---|
| TA005 |
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4-Gallon Metal Reverse Osmosis Storage Tank. This is a standard-sized undersink tank. It is 11" in diameter by 15" from the floor to the top of the valve. The valve is not included, but can be ordered below. If you are replacing an existing tank, your present tank valve will fit our tank. |
$56.00 |
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Go here for More RO Tanks |
| JG014 |
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John Guest 1/4" RO Tank Valve. Fits all standard RO tanks and connects to 1/4" tubing. | $7.00 |
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| JG015 |
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John Guest 3/8" RO Tank Valve. Fits all standard RO tanks and connects to 3/8" tubing. | $7.00 |
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Check Valves
| Part # | Description | Price | ||
|---|---|---|---|---|
| RC001 |  |
John Guest-style Inline Check Valve, 1/4". Inserts into 1/4" Tubing with Quick Connect fittings. Check valves allow water to flow forward but not backward. Every RO unit has at least one, and we put two on our best units. | $14.00 |
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| RC002 | John Guest-style Inline Check Valve, 3/8". Inserts into 3/8" Tubing with quick connect fittings. It’s just like the part above, but it inserts into 3/8" tubing. | $14.00 |
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| RC003 | Insert Style Check Valve. Inserts into John Guest Elbow. | $3.50 |
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| RC004 | Insert Style Check Valve. Inserts into Jaco Elbow. | $3.50 |
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Flow Restrictors
Explanation of Flow Restrictors
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Capillary-Style Inline Flow Restrictors.Insert into 1/4" Drain Line. The number indicates the flow rate, in milliliters per minute. The flow restrictor should match your membrane's production rate. |
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|---|---|---|---|
| FR001 | 200 ml/minute. | $7.00 |
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| FR002 | 250 ml/min | $7.00 |
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| FR003 | 350 ml/min | $7.00 |
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| FR004 | 420 ml/min | $7.00 |
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| FR005 | 525 ml/min | $7.00 |
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| FR006 | 800 ml/min | $7.00 |
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Insert Style Flow Restrictor.Inserts into either Jaco or John Guest membrane housing elbow w/ 1/8" treaded fitting. The number indicates the flow rate in gallons per day. The flow restrictor must match your membrane's production rating. Pictured at left is the FR203 (125 gpd green John Guest Style); the colors vary. |
Jaco Style | ||
|---|---|---|---|
| FR100 | 50 gpd Yellow | $2.50 |
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| FR101 | 70 gpd Blue | $2.50 |
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| FR102 | 100 gpd Red | $2.50 |
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| FR103 | 125 gpd Green | $2.50 |
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| FR104 | 150 gpd Black | $2.50 |
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| FR105 | 200 gpd Brown | $2.50 |
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John Guest Style |
| FR200 | 50 gpd Yellow | $2.50 |
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| FR201 | 70 gpd Blue | $2.50 |
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| FR202 | 100 gpd Red | $2.50 |
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| FR203 | 125 gpd Green | $2.50 |
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| FR204 | 150 gpd Black | $2.50 |
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| FR205 | 200 gpd Brown | $2.50 |
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Faucets
We carry several faucets that will replace the standard equipment faucet on any reverse osmosis unit, regardless of brand. Below are our least expensive faucets, one in ‘air gap’ style and one in non-air gap. Go here for our full faucet list, as well as links to explanations and discussion of installation, the drilling of holes, the concept of the air gap faucet, and other grippingly interesting topics.
| Part # | Description | Price | ||
|---|---|---|---|---|
| LF700 |
|
Tomlinson Pro-Flo Long Reach Ledge Faucet, Non Air Gap | $38.00 |
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| LF701 | Tomlinson Pro-Flo Long Reach Ledge Faucet, With Air Gap | $48.00 |
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Inlets and Drains
R.O. Accessories
| Part # | Description | Price | ||
|---|---|---|---|---|
| RC400 |
|
HMDigital TDS Tester, measures 0 to 1000 parts per million total dissolved solids. TDS Tester Discussion. | $33.00 |
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| LP402 |
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Watts Leak Protector. Detects leaks and turns off water supply when moisture is detected. Click here for info. | $18.00 |
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| WR001 |
|
Standard Filter Wrench for standard-sized RO vessels. The standard wrench fits Flowmatic (and many other brands) housings. If you have a Pentek (Ametek) unit, specify Pentek in the comments section on the shopping cart when ordering. | $4.00 |
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We pay shipping! on everything listed on this page.
Low inlet pressure? See the Aquatec electric Booster Pumps & non-electric Permeate Pump.
Air gap faucet problems? Take a look at our Air Gap Drain Adapter.
Filter Cartridges & Membranes for Standard, Hydrotech & Clack (Microline) RO units.
We stock all parts for standard RO units.
If you don’t see what you need on this page, give us a call (940) 382-3814.
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Filtration Systems
- Aeration for Iron & Sulfide
- Backwashing Filters
(whole house & well units)
- Chlorinators (Dry Pellet)
- Chlorinators (Feed Pumps)
- Countertop Water Filters
- Emergency Filters
- Garden Hose Filters
- Multipure
- Reverse Osmosis, Residential
- Reverse Osmosis, Commercial
- Shower Filters
- Ultraviolet Systems
- Undersink Filters
- Water Softeners
- Whole House Filters
Cartridges
(listed by part numbers)
Parts
- Faucets
- Filter Media
- John Guest Fittings
- O-rings
- R.O. Parts
- R.O. Tanks
- R.O. Booster Pump.
- Water Testing - In House
- Water Testing - Laboratory