Replacement water filters, RO reverse osmosis membranes and whole house filter systems. Refrigerator water filters, pool and spa filter. Pentek, OMNIFILTER water filters. Chiller Daddy water chillers

Search
Cart ()
Order Tracking
Reorder
Toggle Nav
Home
Replacement Water Filters
Reverse Osmosis Systems
Whole House Water Filters
Refrigerator Water Filters
Water Testing
Pool and Spa Filters
Boat & RV Water Filters
Parts Department
Water Chillers
Installation and Trouble Shooting Guide
Specialty Water Filters
Well Water
Gift Guide
Toggle Nav
Cart ()
Order Tracking
Search
Advanced Search
Menu
Menu
Account

Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filter system repair parts. From one water filter or membrane to case quantity discounts.

LOW PRICES and FAST SHIPPING SINCE 1999 !

99.5% Of All Items In Stock For Same Day Shipping!

Membrane Housings

Membrane Housings

 

Standard Size Replacement Reverse Osmosis RO Membrane Housings

 

(See the Diagram With Dimensions At the Bottom of This Page)

 

Find out how to increase the GPD capacity size of your membrane.

  1. Standard Size RO Reverse Osmosis Membrane Housing
    Standard size RO reverse osmosis membrane housing
    Standard size RO reverse osmosis membrane housing - 90° Ports with 1/8" FNPT Threads - Includes New O-rings and 3 90° 1/4" Jaco Fittings For 1/4" O.D. Tube. Upgrade to the optional John Guest Quick Connectors. The end with a single port is the inlet feed water. On the end with two ports the center port is the permeate (product) water. The offset port is the brine (waste).
    Learn More
    $34.99 Special Price $19.99 As low as $16.99
    Add to Wish List Add to Compare
  2. TW30-1812 RO Membrane Housing- 304 Stainless Steel- SS-1812- 1000
    TW30-1812 Membrane housing - 304 Stainless Steel - SS-1812
    TW30-1812 Stainless Steel RO Membrane Housing - High detail and quality. This high end Stainless Steel RO Membrane Housing fits standard residential TW30-1812 RO membranes, which is the most common size of reverse osmosis membrane for home RO systems. This SS Membrane Housing is the finest quality housing we have ever seen for residential RO systems. Food Grade 304 Stainless Steel.
    Learn More
    $129.99 Special Price $89.99
    Add to Wish List Add to Compare
  3. JOHN GUEST- PI480821S- 1000
    John Guest PI480821S Fixed Elbow 1/4" Tube X 1/8" MNPT Quick Connectors for Drinking Water Systems.

    John Guest PI480821S Fixed Elbow 1/4" Tube X 1/8" MNPT Quick Connectors for Drinking Water Systems - SOLD IN PAIRS

    Learn More
    $4.99
    Add to Wish List Add to Compare
  4. JOHN GUEST - PI010821S - Male Connector 1/4'' Tube X 1/8"" MNPT- 1000
    John Guest PI010821S Male Connector 1/4" Tube X 1/8" MNPT For Drinking Water Systems

    John Guest PI010821S Male Connector 1/4" Tube X 1/8" MNPT For Drinking Water Systems - SOLD IN PAIRS

    Learn More
    $4.99
    Add to Wish List Add to Compare
  5. Jaco Elbow Connector Fitting 1/4" Tube X 1/8" MNPT
    Jaco Elbow Connector Fitting 1/4" Tube X 1/8" MNPT
    Jaco Elbow Connector Fitting 1/4" Tube X 1/8" MNPT Membrane Housing Size - SOLD IN PAIRS
    Learn More
    $4.99
    Add to Wish List Add to Compare
  6. Spanner Wrench To Fit Standard Size Membrane Housings
    Spanner Wrench To Fit Standard Size Membrane Housings
    Wrench To Fit Standard Size Membrane Housings. Easily open those stubborn reverse osmosis membrane housings.
    Learn More
    $17.99 Special Price $9.99 As low as $6.99
    Add to Wish List Add to Compare
  7. Be sure to order the correct Ml flow restrictor to match your reverse osmosis membrane.
    Inline RO reverse osmosis membrane flow restrictor

    Premium inline reverse osmosis membrane flow restrictor - Keep your system operating correctly by replacing worn flow restrictors.  Reverse Osmosis systems use pressure differencials to power the reverse osmosis process.  A worn flow restrictor will alter the proper balance. Our in-line capillary flow restrictors are very simple to install.

    Learn More
    $33.99 Special Price $19.99 As low as $15.99
    Add to Wish List Add to Compare
  8. O-rings For Standard Style RO Reverse Osmosis Membrane Housing
    O-rings For Standard Style RO Membrane Housing
    O-rings For Standard Style RO Membrane Housing. Pair of O-rings for standard style reverse osmosis membrane housings.
    Learn More
    $17.99 Special Price $9.99 As low as $8.49
    Add to Wish List Add to Compare
  9. Molykote-From DOw Corning- 111 Compound-6 Gram O-ring Silicone Lubricant & Sealant-Dow-111-5-gram-1000
    Dow Corning (Molykote) ® 111 6 gram O-ring Silicone Lubricant and Sealant - Be sure to lube your O-rings to help prevent leaks.
    Dow Corning/Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?

    Dow 111 Silicone MSDS Safety Sheet

    Learn More
    $5.99 Special Price $3.99 As low as $1.79
    Add to Wish List Add to Compare
  10. Jaco Run Tee Connector Fitting For Water Filter Systems 1/4" Tube X 1/4" Tube X 1/8" MNPT
    Jaco Run Tee Connector Fitting For Water Filter Systems 1/4" Tube X 1/4" Tube X 1/8" MNPT

    Jaco Run Tee Connector For Water Filter Systems 1/4" Tube X 1/4" Tube X 1/8" MNPT

    Learn More
    $3.99
    Add to Wish List Add to Compare
  11. Jaco Branch Tee Connector Fitting For Water Filter Systems 1/4" Tube X 1/4" MNPT X 1/4" Tube
    Jaco Branch Tee Connector Fitting For Water Filter Systems 1/4" Tube X 1/4" MNPT X 1/4" Tube
    Jaco Branch Tee Connector 1/4" Tube X 1/4" MNPT X 1/4" Tube
    Learn More
    $8.99 Special Price $5.99
    Add to Wish List Add to Compare
  12. Pro Products SS24WS Sani System Water Softener and Conditioner System Sanitizer
    Pro Products SS24WS Sani System Water Softener and Conditioner System Sanitizer
    Pro Products Sani System Sanitizer. 0.5 fl. oz. concentrate. Sani-System ® Pro Products is proud to introduce Sani-System, the first and only EPA product approved for sanitizing water softeners, RO units and Water Coolers. Sani System is proven to kill 99.9% of E. coli, E. coli O157:H7, Staphylococcus aureus, Listeria monocytogenes and other harmful bacteria. It does not use chlorine, other oxidizers or acids that can harm water softener equipment parts. Use is simple; each dose comes in a pre-measured pouch. Just cut, pour and regenerate softener. No measuring, No mess! Sanitizing Equipment! Applications Interior Surfaces of Water Softeners, Reverse Osmosis (RO) Units, Ice Machines, Water Coolers, Water Holding Tanks and Pressure Tanks. Sani-System is now NSF certified!
    Learn More
    $7.99 Special Price $5.99 As low as $3.49
    Add to Wish List Add to Compare
  13. JOHN GUEST- SCV-CI40821W- 1000
    John Guest SCV-CI480821W Check Valve 1/4" Tube X 1/8" MNPT
    John Guest SCV-CI480821W Check Valve. 1/4" Tube X 1/8" MNPT Fixed Elbow.
    Learn More
    $12.99 Special Price $10.99
    Add to Wish List Add to Compare
  14. Inline Check Valve - Back Flow Prevention - John Guest Speedfit Quick Connection 1/4SCV and 3/8SCV
    Inline Check Valve - Back Flow Prevention
    Inline Check Valve - Back Flow Prevention - Check Valve- 1/4" quick connect - one way flow, Easy to install. 1/4SCV and 3/8SCV or John Guest Elbow Fitting for Membrane Housing.
    Learn More
    $27.99 Special Price $19.99 As low as $17.99
    Add to Wish List Add to Compare
  15. JG Replacement O-ring
    John Guest Quick Connector Replacement O-Ring 1/4" - 5-Pack
    John Guest CP-R08I-S 1/4" Replacement O-ring - 5 PER PACK
    Learn More
    $7.79 Special Price $4.99 As low as $3.99
    Add to Wish List Add to Compare
  16. John Guest Locking Clips For Speedfit Quick Connectors For Water Tubes
    John Guest ® Locking Clips For Speedfit Quick Connectors For Water Tubes
    John Guest ® Locking clips secure the collet in position on John Guest Quick Connector to prevent an accidental disconnection of the tube. PIC1808R, PIC1812R and PIC1816R. PIC1808R = 1/4 " PIC1812R = 3/8 " PIC1816R = 1/2". Price is for a packet of 10.
    Learn More
    $4.99 As low as $3.99
    Add to Wish List Add to Compare
Parts Department
Parts Department

Replacement water faucets, water pumps, tanks, UV, drain saddles, o-rings, wrenches, valves, water accumulator tanks, fittings, TDS meters, water filters, reverse osmosis membranes, parts for reverse osmosis and pure water drinking systems. Low prices and fast shipping online since 1999. Quantity discounts. Millions sold. DIY HELP Guides.

More
Water Chillers
Water Chillers

Chiller Daddy Water Chillers for RO reverse osmosis water purification systems - Chiller Daddy CHL-501 & CHL-750XL Undersink and under cabinet water chillr.

More
Installation and Trouble Shooting Guide
Installation and Trouble ...

Water Filter System and Reverse Osmosis System Installation and Service Guide. Huge inventory of replacement water filters , reverse osmosis membranes and maintenance service parts. Low prices and fast shipping online since 1999. Millions sold.

More
Faucets for RO Reverse Osmosis or Filter Systems
Faucets for RO Reverse ...

Replacement Air Gap and Non Air Gap Faucets For Reverse Osmosis RO Systems, Pure Water Systems And Water Coolers - TouchFlo Faucets. Low prices and fast shipping online since 1999. Millions sold. Quantity discounts. DIY HELP Guides.

More
Leak Controllers
Leak Controllers

Leak Controller For Reverse Osmosis Systems, Refrigerators, Ice Makers and Coffee Machines. Low prices and fast shipping online since 1999. Millions sold. Quantity discounts. DIY HELP Guides.

More
Tanks
Tanks

Amtrol Reverse Osmosis Accumulator Water Storage Tanks - Water tanks for reverse osmosis drinking water systems. Low prices and fast shipping online since 1999. Millions sold. Quantity discounts. DIY HELP Guides.

More

Reverse osmosis membrane housing size dimensions

Be sure to check our Parts Department for important parts such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-rings , Filter Housing Wrenches, Faucets, Pumps, Fittings, UV Systems and more parts for your reverse osmosis pure water filtration system.   View maintenance and servicing tips online at our Installation & Trouble shooting Guide.

Easy TDS Membrane Performance Calculator
See If It is Time To Replace Your Membrane
Submit

Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS Rejection will be displayed. We normally recommend membrane replacement once you drop below 75%. This may vary in areas with high TDS in the feed water.

See our selection of TDS meters under Water Tests

SEE OUR ONLINE HELP GUIDE

Compare Products
  1. Remove This Item
Compare
Clear All
You have no items to compare.
My Cart

  1. ​

Filter Change Email Reminder

Filter Change Email Reminder
My Wish List
Last Added Items
  1. Add to Cart
    Remove This Item
Go to Wish List
You have no items in your wish list.