Standard under-sink filter housing for 2.5" x 9.75" cartridges.

Standard under-sink filter housing for 2.5" x 9.75" cartridges.

Standard reverse osmosis membrane housing. Fits standard residential 11.75" x 1.75" TFC membranes.

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.

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.

A shutoff valve stops the flow of water into a reverse osmosis unit when the storage tank is full. John Guest-style quick-connect fittings. Has straight-through flow pattern.

Fits filter housings, but not membrane housings. Can also be used for inline post filters.

Fits membrane housings.

Fits filter housings and inline postfilters.

Fits membrane housings, making a straight connection rather than an elbow.

Connects three 1/4" tubes.

Connects three 3/8" tubes.

Plugs into a straight 1/4" John Guest fitting to make a swiveling elbow.

Plugs into a straight 3/8" John Guest fitting to make a swiveling elbow.

One foot of white 1/4" outer diameter tubing, the most common size tubing for under-sink reverse osmosis and cartridge filter connections.

To order multiple feet, change quantity in shopping cart.

One foot of white 3/8" tubing. To order multiple feet, change quantity in shopping cart.

Attaches membrane housing to the filter bracket. Most RO units use two 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.

“4-Gallon” metal reverse osmosis storage tank. This is the standard tank for all under-sink reverse osmosis systems that we sell. It is 11.5" in diameter by 14.5" from the floor to the top of the valve.

Fits all standard RO tanks. Connects to 1/4" tubing.

Fits all standard RO tanks. Connects to 3/8" tubing.

Inserts into 1/4" tubing with John Guest-style quick connect fittings.

Inserts into 3/8" tubing with John Guest-style quick connect fittings.

150 milliliters per minute flow rate. Standard inline style drain line restrictor for residential RO systems. Recommended for 18 GPD TFC style membranes and 50 GPD GRO membranes.

The tough but attractive Tomlinson Pro-Flo faucet is the standard faucet for all our under-sink filters and reverse osmosis units. It’s a sturdy top performer that uses the proven, traditional up/down handle style.

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.)

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.

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, plug-in elbow, and tubing. Everything you need to connect a 1/4" inlet line.

Installs on PVC drain pipe. Used to connect reverse osmosis drain line. When installed, you can just push your 1/4" drain tubing into the fitting.

Installs on PVC drain pipe. Used to connect reverse osmosis drain line. When installed, you can just push your 3/8" drain tubing into the fitting.

Use as an inlet valve, a shutoff valve for the icemaker line, or anywhere an inline valve is needed.

Use as an inlet valve, a shutoff valve for the icemaker line, or anywhere an inline valve is needed.

HM Digital TDS Tester, measures 0 to 1000 parts per million total dissolved solids. A very handy tool for reverse osmosis owners; it tells you when your membrane needs replacement. TDS Tester Discussion. Can also be used to measure temperature.

Consists of a 1/4" John Guest tubing tee, a 1/4" John Guest refrigerator connector, a 1/4" John Guest inline valve, and enough 1/4" tubing to connect your RO unit to your refrigerator. When ordering, please tell us in the “comments” section how much tubing you'll need.

A solid plastic spanner wrench for opening and tightly closing Flowmatic 2.5" x 9.75" filter housings.