Remember that the unit will be slightly pressurized once completed and running. Insure all glue joints and fittings are secure and water-tight! I used pipe tape on the threads of my 2 fittings and really torqued them into the lid before sealing with epoxy cement.
Once cured, purple dope the inside of the lid lip and the top ½ outside of the cylinder. Once dry, apply PVC cement as you did to the bottom cap and install the lid to the tube. Your denitrator is complete!

