Whole House Repiping in Norcross, GA
Switching a Norcross house from metal pipe to PEX can affect electrical grounding, how the pipes sound, how they are found later and what they must be kept away from, so each is worth settling before the walls close.
Most whole house repiping jobs today replace galvanized steel or copper with PEX, a flexible plastic pipe. The plumbing advantages are familiar: fewer fittings inside walls, easier routing and freedom from the rust and pitting that ruined the old lines. What gets less attention is everything else that shifts when a house goes from metal to plastic. Alpha Plumbing and Sewer walks Norcross homeowners through those side effects so none of them comes as a surprise.
Electrical grounding
In many older houses, the metal water piping is part of the electrical grounding system, with a clamp and wire running between the electrical service and the pipe. Replace that metal with plastic and the path can be interrupted, even though the water flows perfectly. That is an electrical question rather than a plumbing one, so have an electrician review the grounding and bonding arrangement once the plan is set and before the old metal comes out. Leave any clamps and wires attached to the pipe in place until that review is done.
Sound in the walls
PEX carries less of the hammering and rushing noise that rigid metal pipe transmits through a house, and many owners notice a quieter system. It has its own quirk: hot lines lengthen slightly as they warm, and if they are strapped too tightly or pressed against framing, they can tick or creak as they move. Supports that let the pipe slide, and holes bored a little larger than the pipe, prevent that. Banging that continues after a repipe often points to pressure, which a pressure and PRV check can measure and correct.
Sunlight, chemicals and pests
- Sunlight: ultraviolet light degrades PEX, so it is never left exposed outdoors or where daylight falls on it through a vent or window.
- Chemicals: pipe makers warn against contact with certain solvents, petroleum products and some sealants, so check their list before spraying or painting near exposed lines.
- Pests: rodents sometimes gnaw on plastic in attics and crawlspaces, so sealing their entry points protects the pipe along with the rest of the house.
Finding the pipe later
Metal pipe can be traced with a metal detector, but plastic cannot. Before the walls are patched, photograph every open cavity with a tape measure in the frame, and keep a simple sketch of where the main lines run. Years from now, when someone hangs a heavy shelf or remodels a bathroom, that record saves guesswork and possibly a punctured line.
Where plastic meets metal
Even an all-PEX repipe keeps some metal: stub-outs and stop valves at the fixtures, fittings at the water heater and the connection at the main shutoff. These transitions should use fittings the PEX maker approves, and they need firm support so that turning a valve does not twist the plastic behind the wall. When a stop valve wears out years later, swapping it is a routine valve repair. For a broader comparison of PEX and copper, see the overview of whole home repiping.
Norcross inspections
In Norcross, plumbing work is permitted and inspected through the city's Building Official, who also reviews plans. Ask your plumber to confirm with the Building Official what a repipe needs and to book the inspection while the new lines are still visible; the city's frequently asked questions explain how requests are made.
Questions about switching to PEX in Norcross
Does replacing metal pipe with PEX affect my electrical system?
Possibly. If the old metal pipe served as part of the home's grounding path, swapping it for plastic can break that path without any sign at the faucet. The fix is electrical rather than plumbing: an electrician checks the bonding and, if needed, adds a proper connection before the metal pipe comes out.
Why do my new PEX lines make a ticking sound?
Hot lines grow slightly longer as they warm. If a strap is clamped tight or the pipe runs through a snug hole, it catches and releases as it moves, and you hear that as ticking just after the hot water starts or stops. Loosening the strap or opening up the hole lets the pipe slide quietly. Banging when a valve shuts is a separate issue, usually pressure.
Will my water taste different after a PEX repipe in Norcross?
Some owners notice a faint plastic taste or smell in the first days, mostly in water that has sat in the lines overnight. Flushing the system well after installation and running the cold tap briefly in the morning usually takes care of it, and it tends to fade as the pipe is used. If it lingers, mention it to the plumber.
More than a plumbing change
Moving your Norcross house from metal pipe to PEX? Alpha Plumbing and Sewer, reachable at (404) 409-4448, can talk through the side effects as well as the plumbing.