I'm planning water inlet for house:
- For 2-4 people
- 300m2 garden watering system ocasionaly (there is seperate garden water inlet as well)
- Water comes in via 32mm PE pipe (internal diameter 26 mm ~ 1") from shared deep well pump.
Main question now – what should all inlet system connection sizes be? Valves, regulators, expansion reservoir (1" connector), check valves, meter, particle filter, water softener filter (1" connectors), etc., not including branch-off to kitchen/bathroom that would be different sized. My initial thought was 1", but some of those are more widely listed as 3/4" in local shops (regulators, meters).
Will 3/4" give any noticeable bottlenecks here? Should I go all 1" here?
Best Answer
I've worked on a house where the 1" input was immediately reduced to half inch. Stupid, and part of my work was replacing that.
Keep everything 1" 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" for each side and 1/2" to individual fixtures. I prefer to use 3/4" for hose bibbs (which only gets reduced to 1/2" at the hose bibb connection, since if a 3/4" connector hose bibb exists, it's a rare and likely expensive beast.)