Frequently Asked Questions

What Is Cured-In-Place-Pipe (CIPP)?

Water Main CIPP
CIPP is a means of rehabilitating an existing water main using a woven polyester tube that is impregnated with liquid epoxy. The epoxy is hardened through the application of heat. Once the epoxy has cured it becomes a structural component which lines the internal dimensions of an existing water main, taking the form of the main’s interior and shape.

Waste Water Main CIPP

CIPP is a means of rehabilitating an existing waste water main using a felt tube impregnated with liquid resin. The resin is hardened through the application of heat. Once the resin has cured it becomes a structural component which lines the internal dimensions of an existing waste water main, taking the form of the main’s interior and shape.

CIPP Material

Water Main Application     
The liner is made of two concentric tubular plain sleeves. Its inner sleeve is coated with polyurethane.  Both sleeves consist of woven polyester.

Waste Water Main Application     
The liner typically consists of multiple layers of felt that is needle pressed together and coated with urethane.

What are the Various Applications for CIPP?

CIPP can be used to structurally reline damaged mains.

CIPP can be used to overcome poor hydraulic performance, eliminate frequent breaks, as well as to eliminate inflow and infiltration on existing utility mains.

Does CIPP Meet Potable Water Quality Standards?

CWW’s CIPP solutions meet current NSF 61 and ANSI 61 potable water quality standards.

What is Water Main Swabbing?

Water main swabbing is the process whereby a polyurethane foam swab is propelled through a new water main through the use of water pressure.

Why is Swabbing Used?

Swabbing is used in the commissioning of new water mains. Swabbing removes all debris within the new water main that has accumulated during construction.

What is CCTV?

CCTV (Closed Circuit Television) consists of a robot-crawler mounted camera that is connected to a monitor by a power and video transmission cable.

What is the Purpose of CCTV?

CCTV is used to perform visual inspections of the inside of mains to determine the extent of main deterioration, the placement of service lateral plugging caps, and the removal of service laterals.

What is Done With the Video?

The video is captured onto a DVD disk for further inspection and archiving. The information contained on the disk can be analyzed at any time to determine the extent of the required rehabilitation. The information is also used for lifecycle management planning and justification for the allocation of maintenance funding.