W=24"   L=43"   D=12"   B=11.75"     31 Gallon Tank

Use a hole saw to create holes for ABS fitting.  For 3" fitting use a 3 1/8" hole saw.   For 2" fitting use a 2 1/8" hole saw.   For 1 1/2" fitting use a 1 5/8" hole saw.  Use ABS cement to install fittings.  Repairs can be made with ABS cement.  MFG# HT 152