I am running all new water supply in an old house (c 1884). The incoming line from the meter is 1" galvanized (no idea how much mineral buildup is inside).
Will it be sufficient to replace all of the plumbing using 3/4" manifolds (one hot & one cold) with 1/2" supplies to the fixtures? There is currently a mix of PVC, copper, and galvanized being used and water pressure at the fixtures is tolerable, but affected greatly by flushing toilets or running the washing machine. I would hope for better with a new system -is that likely?
There are both a whole-house sediment filter and water softener. Any special considerations (order/pipe size) for these with a PEX system? Currently they are connected using 1/2" pipe connected to the 1" inlet (by another home owner), although the water filter will accept 1".