The water feed pipe coming into my house is 1" and my hot water tank connection is 1". One inch pipe continues through my house as a main trunk line. I am installing a water softener and the water connections are 3/4". Is it ok to step down the pipe size to 3/4" to match the In side of the water softener and then step the pipe size back up to 1" on the Out side of the water softener? Will I loose water pressure or GPM?