1. Locate adapter ring over access opening on top of tank 2. Using a 1/4" masonry bit, drill 8 holes 1-1/4" deep on top of tank 3. Clean under surface of adapter ring apply foam gasket or butyl 4. Position adapter ring over opening, using 1/4" anchors, tap anchors into drilled holes and tighten with wrench 5. Position appropriate riser and or cover and screw onto the adapter ring to provide a watertight connection
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