Just for the record, and in case anyone has more detailed information. Our
Delta 1400 series single-lever bathtub faucet has been leaking, and my
internet searches turned up several exploded diagrams with the water control
balls in them. I purchased Delta parts at HD and disassembled. To my
surprise - I know nothing about plumbing - the internals were completely
different. They are pictured at http://www.zhando.com/faucet/faucetpix.html
I actually used the rubber seats and springs that were for the ball-control
system, and they appeared to fix the problem. You can see what I'm talking
about in image 5. Now for my questions: what's the best way to search for a
diagram that would have showed me these parts? Everything I came up with for
the 1400 series was different. And does anybody know more about this system,
where to get a repair kit, etc.?

Thanks,

Bruce Kimball from Louisville