PEX vs Copper Pipe for Goodyear, AZ Homes: Compared

What each pipe is

Copper is a rigid metal tube joined with soldered or press fittings. PEX is cross linked polyethylene, a flexible plastic tube joined with crimp or expansion fittings. Both carry drinking water, and both are used in new houses and repipes.

Your home may already have one of them, or an older pipe such as galvanized steel or polybutylene, which is known for failures.

Hard water and scale

Hard water scale forms inside pipes over time, and it can affect any material. Copper can also develop pinhole leaks in some water chemistries. PEX does not corrode, though fittings and manifolds can still scale.

Ask your plumber what they have seen in local water, and check your provider's water quality report for hardness and chemistry.

PEX and copper compared

General traits, not a promise for any one house.

Cost and repairs

Price depends on the house, access and the number of fixtures. PEX materials are generally less expensive than copper, and labor can be lower. Ask for a quote that lists the pipe, fittings, permit and wall repair separately.

Repairs on either material are straightforward. PEX uses push or crimp couplings. Copper can be soldered or fitted with press couplings.

Manifold systems and trunk lines

Some PEX systems use a central manifold with a separate line to each fixture. That makes it easy to shut off one bathroom, and it keeps pressure steady when two fixtures run at once. Trunk and branch layouts use fewer pipes but behave like copper systems.

Ask the plumber which layout they propose and where the manifold will sit so you can reach it.

Building codes and permits

Cities set plumbing rules, and a permit and inspection are normal for repipes and additions. The inspector checks supports, fittings and pressure tests. Confirm that your plumber pulls the permit and schedules the inspection.

Keep the paperwork. It helps when you sell and when you file an insurance claim.

Water quality and your tap

Your provider's water quality report lists hardness and other values. For reference, the City of Goodyear's 2021 report showed hardness around 14 grains per gallon in one system. Hard water does not harm PEX or copper right away, but it builds scale in heaters and fixtures.

Pairing your pipe choice with a softener or filter plan is sensible. See water filtration for options.

Common myths

One myth says plastic pipe always leaks at fittings. Properly installed PEX fittings are reliable. Another says copper is trouble free. Pinholes, corrosion and solder joint failures do happen. A third says one material is always cheaper. Price depends on layout, access and labor.

Ask for the reasons behind a recommendation and compare quotes on the same scope.

Planning for the future

If you expect to add a bathroom, an outdoor kitchen or a casita, tell the plumber now. Extra stubs and a manifold with spare ports cost little during a repipe and save walls later. Think about a water softener loop and a place for a recirculating line too.