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FAQs
Frequently Asked Questions & Answers:

What host pipe materials can be lined with MainSaver?
What pipe diameters can be lined with MainSaver?
MainSaver is a "thin wall" lining. What is a "thin wall" lining?
How deteriorated can the old host pipe be and still be a candidate for MainSaver?
What holds MainSaver linings in position?
What is the maximum lining length in a single run?
What is the return to service time?
What happens at the service connections?
Are any special tools or equipment required for field repairs?
Can inclined pipes be lined with MainSaver?
Can bends be lined with MainSaver?
How are lined sections reconnected with the main?
How do you line around inline valves?
How can you ensure complete grout coverage in the annulus between the liner and the host pipe wall?
Is MainSaver suitable for applications other than water mains?
Who do I contact to get MainSaver installed in my area?


What host pipe materials can be lined with MainSaver?
MainSaver is designed for the rehabilitation of all common pressure main pipe materials, including steel, cast iron, ductile iron, concrete, concrete cylinder, asbestos cement, PVC and PE.
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What pipe diameters can be lined with MainSaver?
MainSaver is designed for pressure pipes from 4" (100 mm) to 12" (300 mm) in diameter.
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MainSaver is a "thin wall" lining. What is a "thin wall" lining?
A thin-walled lining has some structural strength, but the liner is not sufficiently strong to carry the full design pressure loading by itself. In the absence of the host pipe, the lining would deform, reaching a rupture condition in a shorter time than the system design life. However, a thin-walled lining, like MainSaver, acting in concert with the residual strength of the host pipe can restore the aging main to new, or better than new, condition.
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How deteriorated can the old host pipe be and still be a candidate for MainSaver?
MainSaver can be used where the host pipe has sufficient residual strength to withstand the full design pressure loading but suffers from corrosion pits, holes, failing joints, tuberculation, circumferential or longitudinal cracks, ground movement, and poor water quality due to aging pipe material, corrosion deposits and failing existing linings. MainSaver is also ideal for internal encapsulation of asbestos cement pipes.
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What holds MainSaver linings in position?
While there is adhesion to iron and asbestos substrates, MainSaver is not reliant on mechanical bonding to position the liner. The MainSaver installation process forms a continuous arch against the inner wall of the host pipe. The arching effect keeps the liner in position.
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What is the maximum lining length in a single run?
Maximum lining lengths often vary based upon site circumstances, including convenient access points, fire hydrant locations, temporary service bypass requirements, etc. As a general rule, MainSaver lining lengths are 300 - 350 ft (~ 90 - 105 m).
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What is the return to service time?
Return to service procedures may be initiated 16 hours after installation.
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What happens at the service connections?
Service connections are exposed and plugged during the lining process. Service connections are often a major source of leakage and it makes sense to repair them during the lining process. After lining the services are drilled and new ferrules are reinstated with a NSF Certified sealing compound.
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Are any special tools or equipment required for field repairs?
Pipes lined with MainSaver require no special tools, equipment, or fittings for field repairs. New services can be drilled and tapped into the host pipe using standard ferrules.
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Can inclined pipes be lined with MainSaver?
Yes.
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Can bends be lined with MainSaver?
As a general rule, long radius bends of 11.25 to 22.5 can be lined. Please contact MainSaver to discuss project specific requirements and solutions.
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How are lined sections reconnected with the main?
MainSaver uses standard mechanical couplings.
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How do you line around inline valves?
MainSaver typically uses valve locations as access points. Old valves are replaced with brand new valves when the lined sections are reconnected to the main.
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How can you ensure complete grout coverage in the annulus between the liner and the host pipe wall?
MainSaver uses infrared thermography to verify complete grout coverage around the outside of the liner. This infrared image combined with a complete closed circuit video record of the liner provides tangible proof the lining was successful.
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Is MainSaver suitable for applications other than water mains?
MainSaver was designed primarily for the rehabilitation of 4 - 12" (100 - 300 mm) diameter water mains; however, other pressure pipe applications may be suitable for the MainSaver rehabilitation process. Please contact MainSaver to discuss your particular pressure main rehabilitation needs.
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Who do I contact to get MainSaver installed in my area?
To locate a licensed MainSaver installer in your area, please contact MainSaver at:

MainSaver
14062 Denver West Parkway, Ste. 110, Bldg. 52
Golden, CO 80401
USA

Toll Free: +1 (866) 594-8345

Tel: +1 (303) 277-8603
Fax: +1 (303) 277-0042

E-mail: info@mainsaverworld.com
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Ideal for 4 - 12" Pressure Pipes
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