Hi,
I'm planning a new double shower, with 2 separate faucets and shower heads, will standard supplies be sufficient or is there a way to increase my volumes ?
Thanks, Ron

Do not hok these two showers together in series off the same pipe. Try to get back to the main hot pipe and make two separate taps. Use 1/2" or larger for your supplies. The maker of the shower valve will specify the correct size for your model. If it's a Moen I hope you are a visual learner, it's all pictures and almost no wording in the install instructions.

Hi,
I'm planning a new double shower, with 2 separate faucets and shower heads, will standard supplies be sufficient or is there a way to increase my volumes ?
Thanks, Ron

You should branch off from a trunk that is a minimum of 3/4".