Delta Rp7430 Dome Strainer

This is the worst designed tub strainer - do not buy! I purchased three of these strainers to match my new Dryden fixtures. The design of this product does not allow for all of the water to drain out of the tub. The dome and the drain holes are above the water level. I literally have to wipe out the water around the strainer, wringing out the cloth several times. I am now forced to purchase new toe tap drains and matching overflow plates, at a very large cost. Delta needs to rectify this design problem.