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pex to copper

  1. Plumbing
    I am installing a new shower system (3/4") - the main is 3/4" but splits immediately into 1/2" cold and 1/2" to the hot water heater. I'm thinking I need to re-plumb all the way back to the 3/4" copper main. The question is should I go with 1" pex, or 3/4" pex. I know it's counter...