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

Part # Description Price
FH001 White 1/4" Filter Housing for 9.75" X 2.5" Cartridges $23.00 Add to Cart
FH002 Black 1/4" Filter Housing for 9.75" X 2.5" Cartridges $23.00 Add to Cart
FH003 Clear 1/4" Filter Housing  for 9.75" X 2.5" Cartridges $27.00 Add to Cart
MB005 Mounting bracket for 2 housings. $14.00 Add to Cart
MB003 Mounting bracket for 3 housings. $16.00 Add to Cart
MM999 Membrane Housing.  (Ports are end, side, side.) $12.00 Add to Cart
MB905

Filter Housing Screw Packet.

Contains four #10 Screws, 3/4" long, to mount filter housing on bracket.

Use this set if you are attaching a housing without a membrane clip.

$1.00 Add to Cart
MB906

Filter Housing Screw Packet.

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 Add to Cart

Shutoff Valves

More about Reverse Osmosis Shutoff Valves

Part # Description Price
RC301 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 Add to Cart
RC300 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 Add to Cart
RC304 Flowmatic Automatic Shutoff Valve (Jaco-Style fittings with nuts included). Has straight-through flow pattern. $15.00 Add to Cart
RC303 Flowmatic Automatic Shutoff Valve (John Guest-style fittings). Has straight-through flow pattern. $16.00 Add to Cart

Fittings, Tubing & Accessories

More about Tubing and Fittings

Part # Description Price
JG033 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 Add to Cart
JG032 John Guest Fixed Elbow, 1/8" male pipe thread X 1/4" tube. Fits membrane housings. $2.70 Add to Cart
JG002 John Guest Fixed Connector, 1/4" Pipe X 1/4" Tube. Fits filter housings and inline postfilters. $1.95 Add to Cart
JG001 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 Add to Cart
JG011 John Guest 1/4" Tube Tee. Connects three 1/4" tubes. $3.85 Add to Cart
JG012 John Guest 3/8" Tube Tee. Connects three 3/8" tubes. $4.70 Add to Cart
JG022 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 Add to Cart
JG024 John Guest 3/8" Plug-In Elbow. Plugs into a straight 3/8" JG fitting to make a swiveling elbow. $4.60 Add to Cart

See all of our quick connect fittings here!

JG024 John Guest 3/8" Plug-In Elbow. Plugs into a straight 3/8" JG fitting to make a swiveling elbow. $4.60 Add to Cart
FT033 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 Add to Cart
FT032 Jaco Fixed Elbow, 1/8" male pipe thread by 1/4" tube. This fits most membrane housings (but not filter vessels). $1.50 Add to Cart
FT002 Jaco Fixed Connector, 1/4" Male Pipe Thread X 1/4" Tube. Fits filter housings and inline filters. $1.75 Add to Cart
FT011 Jaco 1/4" Tube Tee.  Connects three 1/4" tubes. $1.75 Add to Cart
FT012 Jaco 3/8" Tube Tee.  Connects three 3/8" tubes. $4.50 Add to Cart
FT045 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 Add to Cart
TB001 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) Add to Cart
TB004 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) Add to Cart
TB100

Tube inserts for 1/4" Tubing.

Must use with Jaco fittings.  Do not use with John Guest fittings.

$0.10 Add to Cart
TB101

Tube inserts for 3/8" Tubing.

Must use with Jaco fittings.  Do not use with John Guest fittings.

$0.10 Add to Cart

Mounting Clips

Part # Description Price
RC208 Membrane Clip. Attaches membrane housing to the filter bracket. Most RO units use two membrane clips. $2.00 Add to Cart
RC200 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 Add to Cart

Tanks & Tank-Valves

More About Tanks and Tank Valves

Part # Description Price
TA005 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 Add to Cart

Go here for More RO Tanks

JG014 John Guest 1/4" RO Tank Valve. Fits all standard RO tanks and connects to 1/4" tubing. $7.00 Add to Cart
JG015 John Guest 3/8" RO Tank Valve. Fits all standard RO tanks and connects to 3/8" tubing. $7.00 Add to Cart

Check Valves

Check Valve Discussion

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 Add to Cart
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 Add to Cart
RC003 Insert Style Check Valve.  Inserts into John Guest Elbow. $3.50 Add to Cart
RC004 Insert Style Check Valve. Inserts into Jaco Elbow. $3.50 Add to Cart

Flow Restrictors

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.

FR001 200 ml/minute
(Recommended for 18 gpd membrane.)
$7.00 Add to Cart
FR002 250 ml/minute
(Recommended for 25 gpd or 36 gpd membrane.)
$7.00 Add to Cart
FR003 350 ml/minute
(Recommended for 36 gpd membrane.)
$7.00 Add to Cart
FR004 420 ml/minute
(Recommended for 50 gpd membrane.)
$7.00 Add to Cart
FR005 525 ml/minute
(Recommended for 50 or 75 gpd membrane.)
$7.00 Add to Cart
FR006 800 ml/minute
(Recommended for 75 or 100 gpd membrane.)
$7.00 Add to Cart

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
(Recommended for 10 or 12 gpd membrane.)
$2.50 Add to Cart
FR101 70 gpd — Blue
(Recommended for 18 gpd membrane.)
$2.50 Add to Cart
FR102 100 gpd — Red
(Recommended for 25 gpd or 36 gpd membrane.)
$2.50 Add to Cart
FR103 125 gpd — Green
(Recommended for 36 gpd membrane.)
$2.50 Add to Cart
FR104 150 gpd — Black
(Recommended for 50 gpd membrane.)
$2.50 Add to Cart
FR105 200 gpd — Brown
(Recommended for 50 gpd membrane.)
$2.50 Add to Cart
John Guest Style
FR200 50 gpd — Yellow
(Recommended for 10 or 12 gpd membrane.)
$2.50 Add to Cart
FR201 70 gpd — Blue
(Recommended for 18 gpd membrane.)
$2.50 Add to Cart
FR202 100 gpd — Red
(Recommended for 25 gpd or 36 gpd membrane.)
$2.50 Add to Cart
FR203 125 gpd — Green
(Recommended for 36 gpd membrane.)
$2.50 Add to Cart
FR204 150 gpd — Black
(Recommended for 50 gpd membrane.)
$2.50 Add to Cart
FR205 200 gpd — Brown
(Recommended for 50 gpd membrane.)
$2.50 Add to Cart

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 Add to Cart
LF701 Tomlinson Pro-Flo Long Reach Ledge Faucet, With Air Gap $48.00 Add to Cart

Inlets and Drains

Part # Description Price
IV100 Standard Saddle Valve. 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 Add to Cart
IV103 MAX ADAPTER inlet adapter. Use with flexible water lines. This adapter comes with inline valve (see jg039 below) and tubing. Everything you need to connect a 1/4" inlet line to the RO unit. The adapter is for use on the lower end of flexible water lines. Used for 3/8" flexible water line. $16.00 Add to Cart
IV101 Murdock Inlet Adapter. Use with flexible water lines. This adapter comes with inline valve (see jg039 below), plug-in elbow, and tubing. Everything you need to connect a 1/4" inlet line to the RO unit. The adapter is for use on the upper end of flexible water line. Used for 1/2" flexible water line. $16.00 Add to Cart
RC100 Drain-Saddle with 1/4" John Guest elbow. When installed, you can just push your 1/4" drain tubing into the fitting. If you prefer a Jaco (plastic compression nut) style fitting, just ask for a substitution in the comments section on the cart. The price is the same. $9.00 Add to Cart
RC103 Drain-Saddle with 3/8" John Guest elbow. When installed, you can just push your 3/8" drain tubing into the fitting. If you prefer a Jaco (plastic compression nut) style fitting, just ask for a substitution in the comments section on the cart. The price is the same. $14.00 Add to Cart
JG039 Inline Valve, 1/4". With John Guest fittings. Inserts into 1/4" tube. A very handy valve. Use as inlet valve, a shutoff valve for the icemaker line, anywhere an inline valve is needed. $6.00 Add to Cart
JG040 Inline Valve, 3/8". Inserts into 3/8" tubing anywhere you need a valve. $7.00 Add to Cart

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 Add to Cart
LP402 Watts Leak Protector. Detects leaks and turns off water supply when moisture is detected. Click here for info. $18.00 Add to Cart
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 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.


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