House water inlet thread sizing 1" vs 3/4"
I've worked on a house where the 1&quot; input was immediately reduced to half inch. Stupid, and part of my work was replacing that.
Keep everything 1&quot; up to the hot/cold split (i.e., the point where the cold feed for the water heater leaves the rest of the cold water - so pressure tank, water softener filters - why would you have a meter? Is that due to the sharing?), at which point 3/4&quot; for each side and 1/2&quot; to individual fixtures. I prefer to use 3/4&quot; for hose bibbs (which only gets reduced to 1/2&quot; at the hose bibb connection, since if a 3/4&quot; connector hose bibb exists, it's a rare and likely expensive beast.)