To be honest I’d check mine but I’m out of state right now, Google said normal is 2-5 so I figured 3 is probably fine for most “normal” houses, but idk. For me normal is really as long as I can run a hot shower and a dish washer at the same time.

Checking online says mine is 1.8-4.3 depending on inlet temperature. Though I live in florida, so I likely get the higher end. Looked up average flow for one shower is like 2.2ish, so 4-5 might be more normal.

Soooo, if you want say 2 showers, let’s call it 4.7

Makes 626.1711/12, gives 52.2, so yeah again round up to be sure and we get 53 for a uh, family size house?