Whether replacing an old manhole riser installation or working on a new project, the Whirlygig system is for you!
Whirlygig is a revolutionary method of manhole riser/collar installation. It is size accurate, installed in minutes and leaves no doubt about quality control. Cast-in-place on site, our manhole riser/collar system is ideal for new construction or rehab projects.
Over 200,000 installations across America and growing every year!
The Whirlygig system is:
- Easy to install. Please watch our video on this page where each step of the process is explained in full detail. You will be amazed!
- Streamlined installation is a snap and works everytime.
- Sturdy - Our high quality pre-formed thermoplastic form is constructed to outlast any other system available.
- Please see our Specifications Page for compete details.
