There are two primary companies here in the bay area that specialize in re-piping â€“ they can do it faster and cheaper than any regular plumber I know because it is what they do all day long every day.
Repipe Specialists - http://www.repipespecialists.com
Repipe1 - http://www.repipeone.com
I have not used either company and therefore this does not constitute an endorsement, however, Iâ€™ve heard good reviews of both. They can give you prices on both copper and PEX.
While used in many other parts of the country with success for years, PEX has been slow to catch on in California because of opposition from the plumberâ€™s unions. It takes considerably less time to install PEX, therefore unions have lobbied against it in an effort to keep plumbers employed using older, traditional methods. There are many key advantages to PEX:
1. Ease of installation â€“ you only need one clear stretch of pipe from the manifold to the end supply device. Since it goes around corners and can be poked through tight spaces, numerous labor intensive joints are a thing of the past and it can be installed almost anywhere. Pipe is cut with shears rather than a saw or pipe cutter and fittings are crimped â€“ it is a MUCH faster process.
2. Cost â€“ copper is climbing in price every year.
3. Safety â€“ anyone who has soldered any number of fittings knows about the vapor given off when soldering.
4. The manifold â€“ since everything goes to one central location, itâ€™s very easy to hook up new lines. This can also be a downside â€“ it can mean longer runs than with copper resulting in a longer period of time to obtain hot water at the faucet.
5. Identification â€“ color coded lines make it a snap to identify hot and cold, rather than the age old method of grabbing onto a hot pipe.
6. Pipe knock is eliminated.
Make sure permits are pulled and, if you choose PEX, you make sure it is approved in your local area.
As for cost, call both companies and ask them for a quote.