EZ1/EZ2 Liner Inversion Products


Note: The EZ2 model has been modified for both air and water inversion. Most customers are familiar with air inversion. Therefore, the information listed below is relative to inverting with water along with the benefit of inverting with water in certain circumstances. 


TRY TEK’s Controlled Water Pressure (CWP) Inversion Unit is a product used to install pipe liner in the Cured-In-Place-Pipe (CIPP) method of rehabilitating pipe. Common methods of installing liner are: 1) to invert with air and cure with steam, or 2) to invert and cure with cold and hot water. Air inversion units often contain the entire liner and have shorter run lengths. Water units often use a scaffold or lift truck to give enough head pressure to the water column.

The CWP Inversion Unit uses water pressure for inversion without the need of high scaffolds or lift trucks. Similar in design and size to an air inversion unit, the CWP Inversion Unit utilizes public water available from hydrants. A hot water boiler is then used to cure the liner. Throughout the inverting and curing processes the CWP Inversion Unit is used to monitor and control the pressure.

To see the various setups of the CWP Inversion Unit, download the Inversion Unit Setups PDF.


The CWP Inversion Unit combines the benefits of water inversion with the convenience of air inversion. While this technology is not new, it was patent-protected from the open market until recently. TRY TEK Machine Works was the sole licensed manufacturer of this equipment until 1999. We are now able to offer this technology to the public.



  • Longer Runs: Invert 1.5 times further than continuous-feed air units and up to 7 times further than drum-style units.
  • Responsiveness: Incompressible water reacts instantly when unit is “jogged,” resulting in easier navigation of bends and irregularities.
  • Control: Inversion speed is more regulated.
  • Safety: Using hot-water for curing eliminates working with hazardous high-temperature steam.
  • Protect Liner: Liner coatings are safe from melting or blistering due to high-temperature steam.
  • Protect Host Pipe: Liner remains constantly inflated from inversion through curing, eliminating host-pipe damage caused by multiple inflations.
  • Complete Curing: With water’s good heat retention, groundwater infiltration into host pipe is much less likely to prematurely cool liner causing incomplete curing.


  • Low-Clearance: Unit can operate under bridges, power lines, and other places not accessible to high scaffolds or lift trucks.
  • Power: Head pressure can be “jogged” or increased if inversion stops.
  • Money: Time not needed to build scaffolds.
  • Safety: No high working platforms.


  • Liner is continuously fed through unit allowing for runs of 1000+ feet. Feeding liner directly from the refrigeration truck eliminates the process of loading liner into the inversion unit.
  • Inversion boots included for 6”, 8”, 10”, 12”, 15” and 18” liner.
  • Quick-change boots from 6” to 12” enables one person to change liner sizes in minutes.
  • Continuous lubrication of liner facilitates smoother inversion.
  • Top roller feeds liner safely into unit.
  • Top capstan provides control of restraining rope during last half of inversion.
  • Manlift attachment lug allows for safe manhole entry without moving unit.
  • Detachable platform gives easy access to top of the CWP unit.
  • Unit stands 9’ 11” (3.03m)  minimum to 11' 11" (3.63m) maximum height, using extendable legs if more room is desired for manhole entry.
  • Assembled weight is 710 pounds (322 kg) with platforms attached, 540 pounds (245 kg) without platforms.
  • Assembly can be done by a two-person crew. No sub-assembly weighs over 160 pounds (240 kg).


Line further with fewer setups
Get in low-clearance areas
Produce better results
Save Money