I agree with the cpvc idea. Not sure about the compression idea tho since I'm not familiar with it unless Chris you are referring to Propress which is brass. I would use copper slipxfip and then a brass mipxcpvc slip to make the transition from copper to cpvc. The cpvc fip and mip adapters can crack very easy when you torque then down. So I would buy the brass x cpvc transition fittings for a couple of more bucks.
