ToolBase.org logo
The Home Building Industry's Technical Information Resource

Back to Standard View
Search TechnologiesAbout Technology Inventory
 
Browse by Building System


Symbol Legend
Adobe Acrobat Reader required for PDF documents

PDF documents require the free Adobe Reader.


All PDF documents open in a new browser window. Close the browser window to return to the site.

Epoxy Pipe Lining

Repipe without tearing out the walls or tearing up the front yard

Cross-section of metal pipe lined with an epoxy coating.

For the millions of homes built for the burgeoning population of the 1950s and '60s, where water pipes are reaching their expected lives, a cured in place pipe liner is an affordable and durable solution to smoothing the interior surface of deteriorating piping. The seamless application restores impermeability; eliminating leaks and future deterioration due to oxidation while improving flow.

The pH of water, chemical composition, delivery pressure, water temperature, and material of the pipe are some of the factors that contribute to pipe deterioration. Low or changing water pressure or green residue at fixtures or drains of copper pipe systems can be some of the initial outward signs of deteriorated pipes. Pin hole leaks, bursts at junctions, and lead contamination from leaching pipe joints can all be effectively remediated from within the pipe. Non-hazardous epoxy materials injected through clean outs, drains, and shut off valve terminations, coat pipe walls with a seamless, durable material much like the lining of premium canned food containers.

The process involves drying the pipes, sandblasting the inside walls with pressurized air and a mineral that removes corrosion and oxidation and prepares the walls to accept the lining, then applying the epoxy lining. The process can be used on galvanized or black iron, steel, copper, or plastic piping, as well as, coal tar impregnated cellulose fiber pipes that have not collapsed. Generally, wherever it is possible to create a pipe within a pipe, epoxy relining can be employed.

The process is enhanced by using visual inspection systems and fiber optic lighting to inspect pipes before and during the process to gauge the degree of deterioration, diameter of the pipe, and effectiveness of the installation.


Affordability

Because pipes are buried within the infrastructure of a building, or in the case of exterior pipes, beneath landscaping and hardscape, it can be less costly to re-line these existing conduits than it is to tear them out and reinstall and cover up.

Environmental Performance

Relining pipes keeps the old material (including the outer surfaces that would be removed to access the pipe) out of a landfill. Likewise, labor and material resources are saved, as domestic supply pipes in the typical 2,200 square foot home can be relined in less than two days versus two weeks to re-pipe, install and finish drywall and repaint.


Medium

The epoxy re-lining process requires specialized equipment. Some jurisdictions require the work to be performed by a licensed plumber.


Water supply pipe epoxy relining generally costs about the same as removing the old pipes and installing new ones; including the cost of average surface refinishing after the fact. The homeowner benefits from the longer warranty on the epoxy method and the quicker completion. Homeowners with upgraded finishes and larger homes will find the relining process to be the least cost approach.

Replacing sewer pipes within the house will be on par with the cost of relining. Re-lining sewer laterals beneath slabs and landscaped yards is usually cheaper than removal and replacement.


Not Applicable


Epoxy pipe coating is approved for supply and drain waste pipes in most regions. However, there remain jurisdictions that will not allow it. Testing and certification must comply with NSF/ANSI Standard 61 - Drinking Water System Components - Health Effects.


Not Applicable


Epoxy pipe lining is a job that should be left to the professionals. Manufacturers' websites contain links to local companies licensed and experienced in the particular process. If the process requires a video inspection of the pipe, a refundable fee is usually charged for the video.


The Ace Duraflo system is warranted for ten years.


Relining saves the homeowner the inconvenience of a home improvement project spanning several weeks. Typical installations can be performed in 48 hours.

Where pipe deterioration results in poor water chemistry, the epoxy can provide protection from future corrosion and protects the users from impurities associated with the pipe deterioration.

Disclaimer: The information on the system, product or material presented herein is provided for informational purposes only. The technical descriptions, details, requirements, and limitations expressed do not constitute an endorsement, approval, or acceptance of the subject matter by the NAHB Research Center. There are no warranties, either expressed or implied, regarding the accuracy or completeness of this information. Full reproduction, without modification, is permissible.