IAPMO Ban of CIPP In Cast Iron Pipe

I attended the annual code committee meeting in Denver, CO this week (April 29-30, 2019). Our industry, CIPP lining, has been under attack by the Cast Iron Pipe Industry. They were successful in outlawing the use of CIPP in cast iron pipe last year and the contractors and suppliers have joined forces to convince IAPMO to reverse their stance.

The issue arose after some failures of using the CIPP process inside buildings due to a method of gapping lateral tie-ins although the code committee has been influenced with some bad information from the iron pipe industry citing no repair can be made to cast iron pipe during manufacture. The push to ban was generated by a gapping method employed cutting section of the CIPP material out and installing the liner so the gaps were allowing wastewater to track between the host pipe and the liner material due to the nature of the resins being used in the pipe material. Sewage leaks between the host pipe and the liner through these gaps and over time leaks appear on walls and ceilings and while the ban specifically bans the use of CIPP for cast iron outside the building, the ramifications for use of CIPP inside is virtually over for those sewer districts choosing to adopt the UPC code.

Cast Iron Pipe is under attack.
Quik-Coating Process.
Quik-Coating System Solution.

That said, if you have installations that you are worried about the gapping allowing sewage to get between the host pipe and the liner and eventually leak Pipe Lining Supply has a fix for you. The Quik-Coating System is being used to create a water tight seal between the lining material and the host pipe. This Quik-Coating System uses a modified poly urea resin that expands as it hardens and hardens completely in 5 minutes after mixing. We have several contractors who are returning to projects where they employed the gapping method for CIPP lining and are experiencing or may experience future leaks. The process is simple to use. The operator roughs up the surface of the liner around the gap opening with a sanding device and high speed cable. Once the host pipe and portion of the CIPP liner and cleaned using this method, any dust remaining is washed away with water or vacuumed away. The operator then replaces the sanding device with application mixing/spreader brushes and covers the liner and bare host pipe with our QCPUA-100 poly urea at the tie in. Depending on the pipe size, multiple coats are applied to meet the standards found in IAPMO’s IGC-351-18a and ICC’s PMG-1485. This method has been tested to current plumbing system pressure testing protocol and has proven to contain any water from tracking between the host pipe and the liner.

If you find yourself in this situation where you’ve used the gapping method and you are concerned that you may see a future failure in your future, this method will prevent that failure. For more information contact Pipe Lining Supply at 888-354-6464 or write to info@pipeliningsupply.com

** The fight isn’t over regarding the final adoption of the code change. The code committee has formally endorsed adopting the change, but the voting members of IAPMO will have a final say by casting a yes or no vote. If you have any local IAPMO members in your area and you don’t want to see the ban of CIPP for use in cast iron pipe, contact the voting member and educate them in what CIPP does, how it benefits their local communities, and how they can help you remain in business to provide an economical solution to build a new pipe inside the old pipe without digging it up.

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