Is there any way to go from 1/2 copper pipe to 1/2 PVC and CPVC without having to sweat the fitting?I am replumbing my kitchen and I need to go from the existing 1/2 hot and cold water pipes which are copper to a down run made of pvc and cpvc.I need to know how to fit the copper to the plastic without sweatting a fitting to the copper.Are there pressure fittings for copper pipe like there is for tubing?
As far as PVC goes, I know they sell a copper-to-PVC adaptor. We use them all the time for lawn sprinkler applications. And I'm sure of the same for CPVC. Cpvc requires a special cement - orange colored I think. Anyway, you may need to go to a plumbing supply house to fix yourself up. For sure, they would have all the parts you would need and would probably know more than the guys at HD or Lowes.
I own a Construction Co and have seen this issue several times with copper. If you do nothing you will no doubt be repairing it again - not to mention high water bills, water damage to wood and other things. You may use CPVC which is rated for both hot and cold water. You may also use PVC which is rated only for cold water - or your both (required for Commercial). Id bit the bullet and replace all the copper. Remember 3/4 mainline split down to 1/2 for each fixture which will usally go down to 3/8. This way more than likely you wont have any water pressure issues. Wrong size line can cause variances
If you are not going to be sweating copper pipe (which I highly recommend), then just go off of the shut-off valves under the sink. If you are doing a total re-plumb of the lines, then 'sweat' in copper pipe. It's not that hard. See link below.
