T-H Marine Bait Tank Plumbing Kit This kit contains everything needed to rig a baitwell or tank. This kit includes professionally designed systems for aeration, directional flow, overflow drain and complete drain accessories. Just plumb your tank according to the detailed installation instructions. The kit contains the following T-H Marine products ODT-190 90º overflow drain tube TH-1202 - 1 18 thru-hull for overflow control, drain plugging and well draining AHV-1 valved aeration head for pumpin