My house water supply is 1" dia. Between the supply and the house is a 3/4" dia line that was connected to a softener and then back to the 1" dia entering the house. I removed the water softener and now it's 1" dia to 3/4" dia and back to 1" dia. How does this affect the volume or pressure in the house?
Thank you,

When you stop to consider that your toilet and lavatory supplys are choked down to 1/4" and every one handled faucet is fed through 1/8" ports in the cartridge the volume and pressure loss from 1" down to 3/4" is negligible. All of our new construction homes are supplied from the meter to the house by 3/4"PVC. Your pressure and volume will not be affected. You will notice nothing. Regards, Tom