G.A. Murdock

5 Ft - Red 1/4" RO Tubing

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Polyethylene Tubing for Reverse Osmosis Systems

Compatible with all Bulk Reef Supply RODI Systems and other RO(DI) systems that utilize 1/4" Polyethylene Tubing. The 1/4" measurement is the outside diameter of the tubing and will work with all 1/4" Push-Connect fittings. 


Red RO Tubing is used on most reverse osmosis systems to designate that the water flowing through it is unfiltered. On most reverse osmosis systems the red tubing will run from the source water connection through pre-filters and up to the source water input on the membrane. After the membrane the color of the tubing will usually change to blue to designate product water, and black to designate waste-water.


Six Sizes Available:

Each length will be a continuous piece. If you need a single piece longer than what is listed below, check out the 500-foot spool.

  • 5 Foot
  • 10 Foot
  • 20 Foot
  • 30 Foot
  • 50 Foot
  • 100 Foot


Make sure to pick up an RO Tubing Cutter for a perfect cut every time!


Made in the USA, Mur-lok Linear Low-Density Polyethylene (LLDPE) tubing is designed for use with all Mur-lok and John Guest push connect fittings. Mur-lok polyethylene tubing offers excellent pressure and temperature ratings and has outstanding resistance to environmental stress cracking, surpassing 1000 hours of ASTM D1693 (10% IGEPAL testing). The tubing is BPA-Free, FDA approved materials and is NSF Standard 58 Certified. The Mur-lok LLDPE Tubing is NSF 58 Component Certified. The products were put through rigorous structural and material testing to help ensure they meet the standards for drinking water. This certification also ensures that our Mur-lok tubing can be easily incorporated into any NSF certified drinking water system with minimal paperwork and minimal, if any, re-testing.

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