Landscape with lake reflection



Watertight Lining Solutions Inc. is a wholly-owned subsidiary of PUC Inc. that provides an innovative solution to aging water infrastructure.

Quick General Facts:

  • Watertight Lining Solutions Inc. (WLS) was incorporated in the fall of 2021.
  • WLS uses the Spray-in-Place-Pipe (SIPP) process which uses a polymer lining (Resiline 320) that repairs leaky pipe and returns them back into service usually on the same day.
  • Municipalities can save taxpayers millions of dollars over time by using the SIPP process.
    • Same day return to service
    • Eliminate temporary mains
    • Brief road/lane closure
    • 120 meters lined per day
    • The SIPP process can reduce total project costs by as much as 30%
  • WLS is the only authorized applicator of Resiline 320 in Ontario.
  • Pipe rehabilitation with Resiline 320 reduces the carbon footprint by up to 75% compared to typical replacement pipe.


How The 6 Step Process Works:

  1. Assessment and Planning (Utility/Municipality) 
    • The rehabilitation process begins with a full site evaluation and condition assessment.
    • Specific details addressed during this project planning phase include environmental and regulatory compliance, easement restrictions, traffic controls and determining the strategic location of access pits.
    • A detailed work schedule is then created in order to minimize impact on traffic, businesses and homeowners.
  2. Site Prep and Excavation (Utility/Municipality)
    • Install all traffic, pedestrian, and worker safety equipment.
    • Install bypass piping, if required.
    • Access pits, measuring 6’ x 10’, can be excavated one day prior to each lining section reducing the impact on the local community.
    • The pipe is isolated, de-watered and a 4-foot section of the pipe is cut out and removed.
  3. Cleaning and Inspection (Watertight Lining Solutions Inc.)
    • The pipe is cleaned using a mechanical cleaning process (rack feed boring, drag scrapping forced air vortex aggregate cleaning, or high-pressure water jetting). This process restores the pipe to its initial capacity by removing any existing biofilm, scale or tuberculation.
    • Depending on the pipe substrate and cleaning method used, a series of foam swabs may be used to remove any loose debris and standing water.
    • Prior to lining, a CCTV inspection of the entire length of pipe is then completed and digitally recorded. Each service lateral is mapped and closely inspected to ensure it is clear of debris.
  4. Lining (Watertight Lining Solutions Inc.)
    • One worker visually inspects the lining head operation at start up.
    • During the lining process, a proprietary software and hardware system monitors and controls the equipment to help ensure proper application in each section.
    • Our small equipment footprint typically allows one lane of traffic to remain open throughout the construction process.
  5. Inspection and Chlorination (Watertight Lining Solutions Inc.)
    • The installed liner can be inspected in as little as ten minutes after installation.
    • A full CCTV inspection is completed for each section, including each connection.
    • A detailed lining report is maintained by the application and copies of all records are provided to the customer (inspection videos, lining printout, lining reports, etc.).   
    • Disinfection completed in accordance with local or AWWA standards.
  6. Reinstatement (Utility/Municipality)
    • The pipe can be reinstated in as little as 90 minutes allowing same day return to service and eliminating the need for bypass piping.  
    • Equipment is easily demobilized after each lined section and roadway plates can be used to return normal traffic flow each day.
    • Once the section has been lined and reconnected, the access pits can be filled and paved.