We are going to open a B&B in Brittany. Imagine this - a house full of guests at 0730 each trying to shave, shower, brush their teeth, etc. as I am about to start the laundry and the breakfast. Now count the complaints when only one water pipe gets the flow! This is what happens now - shower or flush, but not both! And that's with just the two of us! We do not wish to import English plumbing, but a header tank would seem to solve the problem. Any suggestions?