Epoxy Lining

Nu Flow’s epoxy pipe lining technology uses is a simple but highly effective forced air lining process that completely coats the inside of customer’s copper or galvanized pipe.

The Process

After pipe mapping and spotchecking is completed, pipes are dried with heated, compressed air. A safe abrading agent is blown through the pipe system, removing rust and corrosion by-products that are collected in a holding unit for disposal. Compressed air is applied once again to remove fine particles.

Optimal internal pipe surface temperature is created prior to epoxy coating. Another air pressure leak test is performed. Conditioned air is then introduced into the pipe to uniformly distribute the epoxy coating throughout the pipe segment. Following the coating application, continuous controlled air flows through the piping to facilitate epoxy curing.

After the epoxy coating cures, valves and couplings are refitted. A final leak test and inspection confirms lining integrity. Water quality, volume, and flow tests confirm system functionality.

How It Works

In potable water lines, epoxy is blown into cleaned pipes, forming a safe, evenly coated barrier between metal pipe walls and water.

Epoxy lining is a long-term, preventative solution to leaks and breaks, blockages, prevents erosion, water damage and mold growth, and maintains water flow. The epoxy acts as a barrier to heavy metals leaching in drinking water lines from metal piping systems.


Applicable for use in host pipes consisting of metal, iron, steel, plastic, concrete, and fiberglass.

Universal use in the following structures:

  • Potable hot and cold drinking water lines
  • Potable water distribution mains
  • Industrial pressure applications
  • Compressed air systems
  • Process pipes
  • Hydronic systems (air and water) heating and cooling lines
  • Fire suppression sprinkler systems
  • Natural gas and petroleum product lines
  • Electrical conduit
  • Collection, Hold and Transfer (CHT) systems in maritime vessels


Ideal use in diameters ranging from 1/2″  to 10″. Larger custom sizes also available.


Certifications & Approvals

  • Underwriters Laboratories, Inc. approval to NSF/ANSI Standard 61 for safe use in drinking water pipes
  • IAPMO Guide Criteria 189
  • IAPMO-listed, as compliant with IPC and UPC
  • ASTM
  • ASCE


Technical Specification

  • Pipe diameter ranges from 1/2″ to 10″, with larger custom sizes available
  • In pressurized pipe systems, the epoxy lining withstands the rate the psi the host pipe tolerates
  • Negotiates multiple 45 and 90 bends