O-Ring, Pickhole & Bolting Detail - Above are details of our o-ring and bolting options.  These options are available on many of the castings in this catalog.  Most frames can be bolted using either 2, 4 or 6 bolts.  Generally, either the flat gasket or ¼" continuous neoprene o-ring gasket can be used as a watertight seal in bolted frames and covers.  The o-ring gasket is often used in conjunction with the non-penetrating pickhole in covers as a cheap, effective way to reduce the unwanted inflow in sanitary sewer systems.

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With connecting bolts [ ]   Without connecting bolts [ ]