Growonix Tubing 1/4 Black - 25' length

GrowoniX 1/4 in RO Tubing for Leak-Free Water Lines This 25 ft roll of GrowoniX 1/4 in RO tubing is made from Linear Low-Density Polyethylene (LLDPE), a tougher resin than the standard low- or medium-density poly line found on most filtration kits. It's built from non-contaminating, FDA-compliant materials, carries NSF certification, and meets ASTM D-1693 for environmental stress-crack resistance, so it holds up to the constant pressure cycling of a reverse osmosis system without crazing at the fittings. The 1/4 in outer diameter is the standard size for residential and small commercial RO units, dropping straight into push-to-connect ports with no adapters. Why Black RO Tubing Holds Up in Light-Exposed Runs The opaque black wall is the point here. It interrupts photosynthesis, so algae can't take hold inside any section of line that sees grow-room light. Most growers run the black on feed and waste runs near the membrane housing where light exposure is worst, and keep translucent white for the spots where they actually want to watch flow. The trade-off is you lose that visual check on water clarity, which matters less on a waste line than a product line. The same LLDPE is rated for cold and intermittent hot water and pairs with quick-connect, compression, and standard barb fittings; the 25 ft roll suits a single system or short replacement run, with 50 ft and 100 ft rolls available for larger plumbing jobs. Key Features LLDPE Construction: Linear low-density polyethylene resists stress cracking and kinking better than standard poly line. 1/4 in Outer Diameter: Fits standard and quick-connect RO fittings with no adapters needed. Opaque Black Wall: Blocks light to stop algae growth in runs exposed to grow-room lighting. FDA-Compliant & NSF Certified: Non-contaminating materials safe for drinking-water and nutrient lines. 25 ft Roll: Right-sized for a single RO setup or a quick line replacement, also offered in 50 ft and 100 ft. Technical Specifications Specification Value Material Linear Low-Density Polyethylene (LLDPE) Outer Diameter 1/4 in Length 25 ft Color Black (opaque) Certifications FDA-compliant materials, NSF certified Stress-Crack Resistance ASTM D-1693 Water Compatibility Cold and intermittent hot water Fitting Compatibility Standard and quick-connect 1/4 in fittings