Cast-Iron vs PEX: What Pompano Beach Homeowners Should Know

Shut off the main water valve before opening any access panel or attempting to view exposed pipe near a water heater or utility area, even for a quick visual check. This avoids an accidental disturbance to an already-corroded fitting causing an unexpected leak while looking.

Cast-iron and galvanized steel were the standard supply and drain pipe materials through the 1950s, 60s, and into the 70s, exactly the era when much of Pompano Beach and its neighboring coastal cities were built out. A meaningful share of homes in this area still have some or all of that original pipe, simply because it was never a mandatory replacement, only ever a repair-as-needed situation until now.

Both materials corrode from the inside, where it can't be seen or inspected without specialized equipment. Cast-iron drain pipe typically lasts 40 to 50 years before internal corrosion becomes a real problem. Galvanized supply pipe often fails a bit sooner, in the 30 to 50 year range, as the zinc coating wears through and the steel underneath starts rusting.

The failure doesn't announce itself gradually in an obvious way. Water pressure drops slowly, or a water bill climbs with no visible leak, long before anything looks visibly wrong from outside the pipe.

PEX, a flexible plastic tubing, doesn't corrode the way metal pipe does, and it handles minor ground shifting better than rigid copper or the original cast-iron and galvanized lines. It's also faster to install in a repiping job, since it can be run through smaller access points than rigid pipe requires, which keeps the amount of wall or slab opening needed to a minimum.

Copper still has a place in some situations, particularly exposed runs where its rigidity and appearance matter, but for a full repipe, PEX is now the more common choice across this network's coverage area.

The build year is the first clue: anything before 1980 in this area is a real candidate for cast-iron or galvanized pipe. A technician can confirm the actual material during an inspection, often visible at an exposed section near the water heater or in a utility area, without needing to open walls just to check.

A whole-home repipe means opening a limited number of targeted access points, not tearing out entire walls, running new PEX lines through those points, and patching afterward. Most residential jobs finish in one to three days, with water restored each evening rather than being off for the full duration.

Not every home with some cast-iron or galvanized pipe needs a full whole-home repipe immediately. If a previous owner already replaced sections, say the kitchen and one bathroom during a past renovation, while the rest of the home retains original pipe, a partial repipe addressing just the remaining original sections is sometimes the more honest and cost-effective answer than redoing work that's already been done.

The key is an honest assessment of what's actually still original versus what's already been updated, which is why an inspection before any repiping quote matters more than assuming based on the home's overall age alone.

A documented recent repipe is a genuine selling point for a home in this area, since buyers and their inspectors are increasingly aware of the cast-iron and galvanized pipe issue common to homes of this age. Conversely, original 1960s or 70s plumbing discovered during a pre-purchase inspection can become a negotiating point that costs a seller more in a reduced offer than a planned repiping would have cost outright.