I noticed the post last month about Automatic Hot Water Reduction to Control
Long Showers. I just want to reduce the flow to one shower, but use the
same head as in the other bathroom. The Google search show ridiculous
prices for a plastic disk with a hole drilled in it.

http://www.amazon.com/Saving-Shower-...ators-Adaptors

Would a hardware or plumbing store have a blank 1/2" plastic disk I could
drill myself? 1.5 gpm is still too much.

http://www.pexsupply.com/Jones-Steph...rictor-2-5-GPM