Ships same day (M-F) if ordered by 2pm PST.
The old supply valve was slowly leaking water into the porcelain tank. That stagnant water then drains into the toilet causing constant stain and mildew in the bowl. The new supply valve has solved the problem, however it takes some work to install as you must completely disassemble the porcelain tank. Take care not to break the hose barb off of the anti-siphon valve on top of the pressure tank. It's a weak point.