Small Diameter Pipe Lining Nu Flow's Small Diameter Reline System can reline complete inside-infrastructure systems. By using Nu Flow's tools, technicians can reinstate lined laterals. Branch lines can then be lined to the stack quickly and easily. Nu Flow's small diameter pipe lining gives you the benefit of being able to line complete systems right from the 3" (65mm) or 4" (80mm) stack down to the 1.0" (25mm) branch lines. Lateral Lining Nu Flow's Lateral Lining System is used to remotely repair full sections of damaged pipe or even sections anywhere in the lateral. Nu Flow's lateral lining products allow technicians to remotely fix damaged pipe anywhere in the line. Our products are user friendly and easy to install. All of our products can be installed via the clean out.