The brand new valve (my 4th time buying this piece because they break in less than a year every time) is defective. The valve leaks from it's core, non-moving, center. This isn't a seal made by myself during installation as nothing screws in or out of this part of the valve. It doesn't rotate or move at all because it's dead center of the valve itself. All the seals made during installation are bone dry. This part is defective.
[ Editor's Note: If it's defective please contact customer service for a free replacement. We gladly replace defective products in the first 30 days of ownership. Of course the free replacement will also be guaranteed free of defects for 30 days. Thanks ahead of time for asking for that free replacement. Reporting defects helps us spot trouble batches, and make improvements. ]