I want to split a 3/4" cold water line before it enters the water softener. I want to run a dedicated hard water line to our icemaker, outside faucet and upstairs sink drinking faucet. My current 3/4" cpvc lines run about 15' after leaving the hot water heater before reducing to 1/2" cpvc lines for the remainder of the house.

My question is, does it matter when I reduce the 3/4" line after making the Split? Can Ido it immediately with a 3/4" x 3/4" x 1/2" "T" or should the reduction be located further away from the split?

1 Answer 1


No, it really doesn't matter whether you reduce at or after the split. There's no real benefit from having a length of 3/4" pipe instead of 1/2" if it gets reduced anyway.

If you were talking about an extreme distance with many bends, maybe, or if you had extremely low pressure.

  • I agree ice makers don't use much flow and I would change sizes at the T. It is Mich easier to work with smaller diameter tubing than pipe.+
    – Ed Beal
    Feb 20, 2019 at 22:03
  • I would have about 25' of piping with a bend or two; however, none of the items would use much of the hard water. My dishwasher, washing machine and hot water heater would continue to be supplied by the soft water. Feb 21, 2019 at 22:57

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