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Rhino USA of Oregon Manhole Plastic Manholes
Rhino HDPE Manholes

Cutting

  Inlets




Rhino USA of Oregon

When cutting holes to install fittings or pipe into a Rhino HDPE manhole base, allowance must be made for the following:

1. When setting the grade of the pipe or fitting, be sure to maintain a good flowline that is consistent with the channel in the manhole base.

2. Allow for the thickness of the (see below table) gasket. Gasket thickness is determined by pipe diameter: The larger the pipe, the thicker the gasket.

3. The finished hole should be smooth and free of burrs or shavings on the plastic before installation of the gasket. In most cases, a lubricant will be required for successful installation.

Cut hole to larger size for proper installation of gasket and pipe/fitting:

Hole Diameter Cut Size
4" 4-1/2"
6" 6-1/2"
8" 8-3/4"
10" 10-7/8"
12" 12-7/8"


Hole should be smooth and clean for proper installation of gasket.




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