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.


Fix-It-Yourself Reverse Osmosis
Parts & Pieces List

We stock a wide range of standard Reverse Osmosis parts and fittings. If you need help diagnosing an issue or selecting the correct replacement part please give us a call: (940) 382-3814.

Note: For RO Membranes and Cartridges, go to our Cartridge Menu.


Housings & Brackets

Description
Price
Standard filter housing for 2.5" x 9.75" cartridges. 1/4" NPT threaded ports.
$23.00
Part # fh001
Add to Cart
Standard filter housing for 2.5" x 9.75" cartridges. 1/4" NPT threaded ports.
$23.00
Part # fh002
Add to Cart
Standard filter housing for 2.5" x 9.75" cartridges. 1/4" NPT threaded ports.
$27.00
Part # fh003
Add to Cart
Mounting bracket for 2 filter housings.
$14.00
Part # mb005
Add to Cart
Mounting bracket for 3 filter housings.
$16.00
Part # mb003
Add to Cart
Contains four #10 Screws, 3/4" long, to mount filter housing to bracket. Use this set if you are attaching a housing without a membrane clip.
$1.00
Part # mb905
Add to Cart
Consists of four screws: Three #10 Screws, 3/4" long, and one #10 Screw 1" long. Use this packet to mount filter housing on bracket when one of the screws also holds a membrane clip.
$1.00
Part # mb906
Add to Cart

Shutoff Valves

The function of the shutoff valve on undersink reverse osmosis units is to stop the flow of water into the unit when the storage tank is full. More about Reverse Osmosis Shutoff Valves

Description
Price
Jaco-style fittings, nuts included. Horseshoe flow pattern with In/Out on one side and Tank/Tank on the other.
$15.00
Part # rc301
Add to Cart
John Guest-style fittings. Horseshoe flow pattern with In/Out on one side and Tank/Tank on the other.
$18.00
Part # rc300
Add to Cart
Jaco-style fittings, nuts included. Has straight-through flow pattern.
$15.00
Part # rc304
Add to Cart
John Guest-style fittings. Has straight-through flow pattern.
$16.00
Part # rc303
Add to Cart

Fittings, Tubing & Accessories

More about Tubing and Fittings

John Guest Fittings
Price
Fits filter housings, but not membrane housings. Can also be used for inline post filters.
$3.05
Part # jg033
Add to Cart
$2.70
Part # jg032
Add to Cart
Fits filter housings and inline postfilters.
$1.95
Part # jg002
Add to Cart
Fits membrane housings, making a straight connection rather than an elbow.
$1.75
Part # jg001
Add to Cart
Connects three 1/4" tubes.
$3.85
Part # jg011
Add to Cart
Connects three 3/8" tubes.
$4.70
Part # jg012
Add to Cart
Plugs into a straight 1/4" John Guest fitting to make a swiveling elbow.
$2.75
Part # jg022
Add to Cart
Plugs into a straight 3/8" John Guest fitting to make a swiveling elbow.
$4.60
Part # jg024
Add to Cart
Jaco Fittings
Price
This fits most filter vessels, but not membrane housings. Can also be used for inline post filters.
$1.50
Part # ft033
Add to Cart
This fits most membrane housings, but not filter vessels.
$1.50
Part # ft032
Add to Cart
Fits filter housings and inline filters.
$1.75
Part # ft002
Add to Cart
Connects three 1/4" tubes.
$1.75
Part # ft011
Add to Cart
Connects three 3/8" tubes.
$4.50
Part # ft012
Add to Cart
Connects two 1/4" tubes to a 1/4" female pipe thread. (Commonly used to connect tank and permeate lines to inlet of inline post filter.)
$2.70
Part # ft045
Add to Cart
Tubing and Tube Inserts
Price
One foot of white 1/4" tubing. To order multiple feet, change quantity in shopping cart.
$0.15
Part # tb001
Add to Cart
One foot of white 3/8" tubing. To order multiple feet, change quantity in shopping cart.
$0.25
Part # tb004
Add to Cart
Must use with Jaco fittings. Do not use with John Guest fittings.
$0.10
Part # tb100
Add to Cart
Must use with Jaco fittings. Do not use with John Guest fittings.
$0.10
Part # tb101
Add to Cart

Mounting Clips

Description
Price
Attaches membrane housing to the filter bracket. Most RO units use two membrane clips.
$2.00
Part # rc208
Add to Cart
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
Part # rc200
Add to Cart

Tanks & Tank-Valves

More About Tanks and Tank Valves. The tank valve is not included with tank, but can be ordered below. If you are replacing an existing tank, your present tank valve will fit our tank. More RO tank sizes are available here.

Description
Price
“4-Gallon” metal reverse osmosis storage tank. This is a standard-sized undersink tank. It is 11.5" in diameter by 14.5" from the floor to the top of the valve.
$56.00
Part # ta005
Add to Cart
Fits all standard RO tanks. Connects to 1/4" tubing.
$7.00
Part # jg014
Add to Cart
Fits all standard RO tanks. Connects to 3/8" tubing.
$7.00
Part # jg015
Add to Cart

Check Valves

Check Valve Discussion. 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.

Description
Price
Inserts into 1/4" tubing with John Guest-style quick connect fittings.
$14.00
Part # rc001
Add to Cart
Inserts into 3/8" tubing with John Guest-style quick connect fittings.
$14.00
Part # rc002
Add to Cart
Inserts into John Guest-style quick connect fitting.
$3.50
Part # rc003
Add to Cart
Inserts into Jaco-style compression fitting.
$3.50
Part # rc004
Add to Cart

Flow Restrictors

Every reverse osmosis unit has a device called a flow restrictor that determines the amount of water that flows to drain. Explanation of flow restrictors

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.

Description
Price
200 millimeters per minute. Recommended for 18 gpd membrane.
$7.00
Part # fr001
Add to Cart
250 millimeters per minute. Recommended for 25 gpd or 36 gpd membrane.
$7.00
Part # fr002
Add to Cart
350 millimeters per minute. Recommended for 36 gpd membrane.
$7.00
Part # fr003
Add to Cart
420 millimeters per minute. Recommended for 50 gpd membrane.
$7.00
Part # fr004
Add to Cart
550 millimeters per minute. Recommended for 50 gpd or 75 gpd membrane.
$7.00
Part # fr005
Add to Cart
800 millimeters per minute. Recommended for 75 gpd or 100 gpd membrane.
$7.00
Part # fr006
Add to Cart

Insert Style Flow Restrictor

Inserts into either Jaco or John Guest membrane housing elbow with 1/8" threaded fitting. The number indicates the flow rate in gallons per day. The gallon per day rating of a flow restrictor must be appropriate for, but not identical to the membrane's production rating.

Jaco-Style Insert Flow Restrictor
Price
Recommended for a 10 gpd or 12 gpd membrane.
$2.50
Part # fr100
Add to Cart
Recommended for 18 gpd membrane.
$2.50
Part # fr101
Add to Cart
Recommended for 25 gpd or 36 gpd membrane.
$2.50
Part # fr102
Add to Cart
Recommended for 36 gpd membrane.
$2.50
Part # fr103
Add to Cart
Recommended for 50 gpd membrane.
$2.50
Part # fr104
Add to Cart
Recommended for 50 gpd membrane.
$2.50
Part # fr105
Add to Cart
John Guest-Style Insert Flow Restrictor
Price
Recommended for 10 or 12 gpd membrane.
$2.50
Part # fr200
Add to Cart
$2.50
Part # fr201
Add to Cart
Recommended for 25 gpd or 36 gpd membrane.
$2.50
Part # fr202
Add to Cart
$2.50
Part # fr203
Add to Cart
$2.50
Part # fr204
Add to Cart
$2.50
Part # fr205
Add to Cart

Faucets

We carry several faucets that will replace the standard equipment faucet on any reverse osmosis unit, regardless of brand. Below is our least expensive faucet, in ‘air gap’ style and 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.

Description
Price
Tomlinson Pro-Flo Faucet, Non Air Gap
$38.00
Part # lf700
Add to Cart
Tomlinson Pro-Flo Faucet, Air Gap
$48.00
Part # lf701
Add to Cart

Inlets and Drains

Description
Price
This valve can be used to tap into copper pipe from 3/8" to 5/8" diameter. It comes with hardware to make a standard 1/4" compression fitting, and a 1/4" John Guest faucet/refrigerator adaptor is also included. (Please tell us if you need to connect to 3/8" tubing.)
$16.00
Part # iv100
Add to Cart
Use with 3/8" flexible water lines (typically, braided stainless steel). Connects to the lower end of the flexible line. This adapter comes with inline valve (see jg039 below) and tubing. Everything you need to connect a 1/4" inlet line.
$16.00
Part # iv103
Add to Cart
Use with 1/2" flexible water lines (typically, braided stainless steel). Connects to the upper end of the flexible line. This adapter comes with inline valve (see jg039 below), plug-in elbow, and tubing. Everything you need to connect a 1/4" inlet line.
$16.00
Part # iv101
Add to Cart
When installed, you can just push your 1/4" drain tubing into the fitting. If you prefer a Jaco-style fitting, let us know. The price is the same.
$9.00
Part # rc100
Add to Cart
When installed, you can just push your 3/8" drain tubing into the fitting. If you prefer a Jaco-style fitting, let us know. The price is the same.
$14.00
Part # rc103
Add to Cart
Use as an inlet valve, a shutoff valve for the icemaker line, or anywhere an inline valve is needed.
$6.00
Part # jg039
Add to Cart
Use as an inlet valve, a shutoff valve for the icemaker line, or anywhere an inline valve is needed.
$7.00
Part # jg040
Add to Cart

R.O. Accessories

Description
Price
HMDigital TDS Tester, measures 0 to 1000 parts per million total dissolved solids. TDS Tester Discussion.
$33.00
Part # rc400
Add to Cart
A unique leak prevention system from Watts that detects leaks and turns off the water supply when moisture is detected under the sink. Click here for info.
$18.00
Part # lp402
Add to Cart
A solid plastic spanner wrench for opening and tightly closing 2.5" x 9.75" filter housings. Fits Flowmatic and many other brand housings.
$4.00
Part # wr001
Add to Cart

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.


Site Index



View your Shopping Cart


Filtration Systems


Cartridges