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Measure each and every manhole for which
you are ordering inserts, unless you are absolutely sure of
dimensions. Your order will be produced to your supplied dimensions.
Errors in instructions received from you may result in unusable
inserts for you because they are non-returnable.
--If you have any questions concerning the
insert dimensions please call: (952) 927-9215.
The drawings below illustrate the required
measurements
The Style of insert (IP-1 or IP-2) is
determined by the the cover configuration. Style IP-1 inserts are for manhole covers with an essentially
flat underside. Style IP-2 inserts are
designed for deeper covers - so the C and D
Dimensions must be provided.

- Manhole Frame Diameter (flat bearing surface)
- Inside Frame Diameter (clear opening)
- Drop Ring Diameter
- Drop Ring Depth (from cover underside, outside edge)
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