Someone suggested the home run system, and after doing some research, I really like that setup. So, this what I got so far. Guest Bathroom Shower - 1 Hot/1 Cold Sink - 1 Hot/1 Cold Toilet - 1 Cold Washer/Dryer 1 Hot/1 Cold Kitchen Sink - 1 Hot/1 Cold Dishwasher - 1 Hot Master Bathroom Shower - 1 Hot/1 Cold Sink - 1 Hot/1 Cold Toilet - 1 Cold Water Heater 1 Hot/1 Cold Front/Back Yard Spigot 2 cold TELL ME IF MY THINKING IS CORRECT I found a 24 port manifold. 1- Blue 3/4 PEX line from water meter to manifold cold water main 2- 1/2 Blue line from manifold to water heater 3- Red line from manifold hot water main to water heater 4- Then 1/2 red and blue lines from manifold to each fixture QUESTIONS?? 1) Based on what I described, 3/4 will be coming in from the meter, but 1/2 to the water heater, yet it will be 3/4 from the water heater to the manifold. Doesn't make sense to me. Can you explain? 2) There will be ball valves for each port, where do people normally place the manifold, so it is accessible? 3) Did I miss anything?