Good night boys: I had a question about a complete installation of a house (hot and cold water). The client decided to buy a hot water tank, but he doesn't know which one yet; The issue is that I have to make the water ditches to feed the thermos, the outlet, and the cold water only. I thought to make the ditch a meter from the ground outside, and climb when it reaches the hot water tank, then cross the wall and place the entrance keys there, but how can I know the height of the thermos? Is there a statutory height to place the water pipes that enter the house? the complete design is from there down and goes through the subfloor to the bathroom, and then ends.- Thank you very much for answering me !!