s, You seem to know you have an excessive pressure problem. You have laid out a description but actually haven't given any information for us to make a recommendation. What part of the system have you pressure tested. Where you getting 60-80 psi from the hydrant in the street? Have you pressure tested from an outdoor faucet from your house? Is that where you are experiencing 60-80 psi? Do you have a pressure adjustable regulator for your house? The link gives standard looking pressure regulators for homes with various pressure problems. http://www.atlantisplumbing.com/water-pressure-regulators.php Does our house use one of these? What is the height difference between the creek and the garden? As you can read, more info is needed. Aloha

I have 10 gpm flow (measured at a peak time...8am on a hot day). Any recommendations on using 1/2" vs 3/4" (option #1 or #3 above)? I like 1/2" because my hose bib and sprinkler heads are 1/2" and it's simple. Yet I like 3/4" since it gives room for expansion (though now unforeseen) and small extra cost. I just wonder if there are any potential disadvantages to using 3/4" in this application?

I highly encourage you plumb your shower so you can run anywhere from one to all three heads at the same time. Figure out the two heads that will be used most often...for example, you using the handheld and your hubby the fixed. I'd have one valve control the handheld for you, the second valve control the regular shower head for your husband. Then put a diverter on either valve to control the rainhead. Or, get one of the A/B/C diverters that can send water from a single source to either A, B, or C, or any combination of the three. Here's an example. It really will help with flow control. If your supply is 1/2", then just use a half-inch valve. Do realize that with some of the diverter valves it's assumed that there is going to be significant flow required, so they might not be available in a half-inch size. Only larger. Pressure balanced valves feed rainheads just fine. I've neither seen nor heard of a problem. Before doing any plumbing, I'd see what flow volume you're getting out of the half-inch pipe, you'll need to know if it can supply three outlets at once. Example, your three heads are each 2.5gpm, you'll need 7.5gpm out of that pipe to run all three at once. If it can, then you can do as you want. If it can't, then look into a 3x diverter. Or multiple valves, one for each head. Or something in between. Your choice. If you go with a single valve, be aware that the valve may have a volume pass-through restriction. Make sure the valve can pass through the 7.5 gpm that would be required in the example above. Mongo

I'm still stumped as again yesterday the door completed its down cycle but once it hit the down limiter wouldn't go back up. If the motor is bad I would think it wouldn't move at all. I swapped the starter capacitor too...no difference. I really don't mind buying a new opener except the Homelink in my older car ('97)doesn't work with rolling codes, right?