What is CIPP?
2021 marks the 50th anniversary — the birth of the first cured-in-place process for sewer rehab, simply known as CIPP. The CIPP pioneer, Eric Wood, impregnated a felt tube with polyester resin, wrapped it in a plastic sheet, dragged it 230 ft into the 12-in., egg-shaped, brick sewer and inflated it with air. Then left it to cure.
A pipe was given a new life for at least the next 50-plus years.
The 2021 trenchless market reaches into the billions, with more work on sewers lines needed every day as they continue to age and decay. Diameters and lengths are the largest and longest they have ever been, with diameters exceeding more than 120 in. in some projects. Technology and research continue to hum along.
How much experience does Waterline Renewal Technologies have in the infrastructure rehabilitation market?
The Waterline Renewal Technologies team has 85 years of combined experience in the underground rehabilitation sector.
What makes the Waterline Renewal Technologies family of brands different?
Waterline Renewal Technologies is a leading provider of engineered products used in the trenchless rehabilitation of wastewater/stormwater infrastructure for municipal, commercial, industrial and residential applications and provides a unique portfolio of products and services through its brands APM, LMK Technologies, LightRay, and Perma-Liner Industries.
How long does it take to renew a manhole?
It depends on the site conditions, the crew and of course the general contractor, if there is one. Our applicators typically install 6-8 manholes per day.
How long will it last?
The lifetime of the product depends on the conditions and the future use of the area. Generally, PERMACAST® mortar lining will double the life of the existing manhole. It has a design life of 50 years. PERMAFORM® has a design life of 100+ years.
Is it completely no-entry?
Entry is not required for the application of materials. Leak plugging, bench refurbishment and the final inspection require confined space entry.
Is your material similar to other producers?
Our products meet or exceed every product available in today’s market.
Why do you need a mortar under the coating?
We use a primary layer of mortar due to the inherent problems of applying coatings. Coatings are highly dependent on the surface upon which it is sprayed. If preparation is not done properly, there will be a tendency toward failure where the coating did not adhere. By providing a new, clean, structural material, you ensure a successful coating. Thorough preparation of the existing surface is critical to proper adhesion of any coating. The best preparation is a brand new wall free of containment. With MS-10,000 the old wall is thoroughly cleaned, leveled and smoothed. Cor+Gard with epoxy and MS-10,000 cure together to form a one-piece composite.
Why should I spin it on?
The spinner head provides compaction of the materials and consistently uniform thickness throughout.
How does CONSHIELD compare in price to embedded plastic liners such as T-Lock®, Stud-Liner® and Agru Sure-Grip®?
CONSHIELD is less than half the cost of embedded plastic liners and coatings and less than one-third the cost of Linabond®. Plastic liners and coatings require additional work in the field once the manhole is installed to weld the joints, to spark test and to correct the inevitable pinhole defects therefore the cost directly from the precaster is NOT the complete cost to the owner. Coatings and liners are subject to field damage and wear which lead to failures (sometimes catastrophic) if routine inspection and repairs are not made. This results in a much shorter service life.
How does it compare in cost to adhesive-applied linings such as Linabond® and to polymer coatings?
CONSHIELD is less than half the cost of embedded plastic liners and coatings and less than one-third the cost of Linabond®. Plastic liners and coatings require additional work in the field once the manhole is installed to weld the joints, to spark test and to correct the inevitable pinhole defects therefore the cost directly from the precaster is NOT the complete cost to the owner. Coatings and liners are subject to field damage and wear which lead to failures (sometimes catastrophic) if routine inspection and repairs are not made. This results in a much shorter service life.
How does it work?
CONSHIELD molecularly bonds to the concrete particles and impregnates the entire concrete matrix. Protection is throughout the entire thickness and not just on the surface. It is an EPA registered anti-bacterial agent clinically proved to prevent colonization of Thiobacillus bacteria that produce sulfuric acid in sanitary sewer systems. When there are no bacteria, there can be no corrosion.
How much does it cost?
Generally, it adds only $3 to $4 per square foot of interior surface even though it is throughout the entire thickness. Actual costs must be obtained from the pipe or manhole producer and costs will vary by size and wall thickness. By comparison, the higher costs of coatings and linings are raised even higher because the contractor must do additional work in the field such as welding, spark-testing, joint coating and touch up after the pipe is buried.
What is CONSHIELD?
CONSHIELD is a liquid additive for the long term MIC (microbiologically induced corrosion) protection of concrete pipe, manholes and wet wells in heavy sulfide conditions common in sanitary sewers.
Why should we use CONShield?
- CONSHIELD is a single step process precisely dosed under factory controlled conditions for consistent quality control/quality assurance.
- CONSHIELD requires no special tools, forms, training or equipment
- CONSHIELD is in the product. It is not a coating so it will not delaminate, disbond, peel, pinhole or “wear off” over time.
- CONSHIELD is environmentally friendly – it allows an engineer to “go green”.
- CONSHIELD is much less expensive than coatings and liners thereby providing a great value to the owner.
- CONSHIELD fortified structures last for the life of the concrete
An interview with Bill Shook, Found AP/M Permaform
For what type of structures is your system best applicable?
Shook: Because manholes suffer from a variety of problems, we offer multiple solutions, including Permacast structural cement liner, Permaform no dig replacement system, Cor+Gard 100 percent solid epoxy coatings, Cor+Roq structural epoxy, Conshield additive to Permacast, Permaform CIPP liner, and Cor+Flex flexible urethane sealant.
How important is structure preparation for your products? What preparation do you recommend?
Shook: Permacast cement liners are structural by themselves and they adhere well to existing masonry and concrete substrates after pressure washing to remove laitance and contaminates. Cor+Gard coatings adhere extremely well over our own Permacast cement liners which provide the structural value of a composite. Primers are used over new, precast concrete.
Does your product bond to a host structure, or does it form a structure within a structure?
Shook: Cor+Gard, is a coating that adheres well to the properly prepared substrate. Permacast and Cor+Roc structurally reinforce the existing manhole to which it bonds. The Permaform system is a totally independent structure within the old one.
Have product failures occurred and, if so, what were the cause and remedies?
Shook: Failures can occur whenever proper preparation and/or application procedures are not followed. We strive to eliminate field problems by requiring certification training with annual updates so applicators demonstrate proven performance standards. In rare instances when defects are discovered, an investigation is made to discover the cause then defects are corrected and reports issued to eliminate recurrence. Our company has provided solutions since 1976 without a single failure to correct defects. No matter how rare or costly.
After completion, when should your installed product be re-inspected to verify that no potential defects will occur that will affect long-term performance of the product?
Shook: It is best to perform tests immediately upon completion. Follow up inspections should be made during routine maintenance of the manholes and following major storm events or similar harsh events which impact the sewer system.
What is necessary for Manhole Rehabilitation success?
Correct Application, Use Of Manhole Rehab Technologies
By Gerhard “Gerry” P. Muenchmeyer, P.E., NASSCO Technical Director
What is LightRay?
LightRay’s state-of-the-art Cast-in-Place-Pipe technology ushers the Trenchless industry into the twenty-first century, offering new opportunities for plumbers and municipal contractors by significantly reducing time and resources, lowering risks and costs with much faster and higher quality results compared to the older traditional thermal heat or ambient curing processes.
What makes the LightRay product line different than other UV methods?
No more carrying resin materials in your truck or trailer and no need to measure and mix on site. LightRay liners arrive ready to install without any need for refrigeration. This greatly reduces the variability from mixing and preparing liners but also eliminates the requirement for extra equipment in the field allowing for rapid deployment of the system. The LRI system uses non-thermal UV casting resin that is temperature stable and only activated by UV light coupled with high-strength flexible fiberglass coated liners. No matter the temperature in the working environment, the casting times are consistent every time.
What’s the latest development in UV?
- No complex parts or computer regulated movement
- Cures lateral lengths of up to 100 ft at 6.3ft/minute in all types of pipe
- The 50 foot light train incorporates double strand, cold LED lights for industry leading cure times and does not rely on heat to cure the liner
- Our proprietary design allows the light train to be incredibly flexible navigating multiple bends up to 90 degrees
- Liner material is available in 3”, 4” and 6” diameters including transitional flex
- The LRI coated fiberglass liner has a flexural modulus over 4 times greater than felt liner exceeding the requirements of ASTM F1216
- All liners arrive pre-wet out and ready to install and can be stored for up to 9 months
- Our proprietary UV resin does not rely on elevated temperatures to cast or create excess heat
- All systems sold come with a 1 year limited warranty and training included
- Designed, built and supported in the USA
As a contractor, what’s the biggest benefit to my customer?
One of the biggest benefits to the UV cast-in-place LightRay system are the minimal downtime for the customer. This technology eliminates the hours of curing with traditional CIPP thermo-setting resins and will cast-in-place a brand new pipe in under 15 minutes! Benefit to the customer – benefit to the contractor!
Why is it so important to rehabilitate the connection between the private sewer lateral and main line?
Lateral seals are used to protect the area between the mainline and lateral sewer pipe from potential damage. A typical design incorporates either a brim style or complete wrap at any point where it connects with mainlines, depending on which technology you use for those connections; latest technologies allow the lining to continue the entirety of the lateral sewer pipe.
ASTM F-2561 is a driving industry factor in the standard practice for the reconstruction sewer service lateral pipe and its connection to the main pipe without excavation. This is done by using a resin impregnated one-piece main and lateral cured-in-place (CIPP) lining that is installed into the sewer pipe by means of inversion. Once cured, the trenchless sewer line replacement consists of a continuous, one-piece, tight-fitting, corrosion-resistant pipe that extends over a predetermined length of the sewer lateral pipe and provided a structural sealed connection to mainline liner.
Is the T-Liner System patented?
The T-Liner System is not only patented, but LMK Technologies was the team behind creating, writing and developing the technology behind the ASTM 2561 Standard.
Should I have a sewer inspection completed before purchasing a home?
An industry starting to see more and more issues with neglected failing infrastructures is the real estate industry. Many buyers don’t know homeowners are responsible for the wastewater infrastructure below their home, which are called private sewer laterals. Private sewer laterals are the portion of the sewer network connecting private properties to the public sewer system.
Our nation’s infrastructure is aging, and that brings many problems that buyers and realtors need to understand. Many of today’s sewer lines are well over their expected lifespan of 50 years and are made of materials that are not suitable to withstand the nation’s growing population.
Many agencies are now required to include sewer line inspections in a home inspection and, if a problem arises in the inspection, this can cause major issues at closing for both the realtor, potential buyer and seller. But Perma-Liner is here to educate and help those who need it. Being accepted as an approved technology is something that Perma-Liner believes has made a huge difference in how CIPP technology is perceived, including home inspections.
Will roots penetrate through the new lined pipe?
Roots will not longer penetrate through damaged and failing sewer pipes as the new CIPP liner forms a jointless and seamless brand new pipe within the old pipe.
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