Thanks, Dave.

Yeah, it's a little ironic that the pool has two main drains, but has an unsafe vacuum port, with no warning info on the valve.

By the way, Tony, I moved your pics to the PF Picasa gallery. I've got way too many threads that have missing pictures either because vBulletin (the forum software) 'eats' them every time I upgrade OR because users used temporary picture hosting services. Since these threads stick around and are read for years, that's a bummer.