Old Supply Lines and Frozen Pipes: Preventing Winter Plumbing Failures in Greensboro Homes

Most winter plumbing advice stops at "drip your faucets and disconnect the hose." That's good advice, and we covered the basics in our Fall Water Damage Checklist. But when a pipe lets go on a cold night, the real question is usually why that pipe? More often than not, the answer is the age and type of the plumbing itself.

Here in the Piedmont, we don't get the long, deep freezes northern states do. What we do get are sudden cold snaps after mild weather, when homes aren't ready for them. A pipe or fitting that's already worn out is the one most likely to fail when the temperature drops fast. This post walks through the materials and spots that deserve a closer look before winter, and how to tell when repair isn't enough and replacement makes more sense.

1. Polybutylene pipe (the gray plastic)

Polybutylene is a flexible plastic supply pipe, usually gray, that was widely installed in homes built from roughly the late 1970s through the mid-1990s. Plenty of homes around Greensboro, Randleman, and Guilford and Forsyth counties were built in that window.

The problem with polybutylene is that it was found to break down over time, especially at the fittings, and it tends to fail from the inside where you can't see it. Cold weather adds stress to pipe that's already brittle.

How to check: Look where the water line enters the house, at the water heater, and under sinks. Gray (sometimes blue or black) plastic pipe stamped "PB" is a strong sign. Many insurance companies also ask about polybutylene, so it's worth knowing what you have.

Repair or replace? Spot repairs on polybutylene rarely fix the underlying issue. If your home still has it, planning a repipe with PEX or copper is usually the smarter long-term move.

2. Galvanized steel pipe

Older homes, especially those built before the 1960s, may still have galvanized steel water lines. These pipes rust from the inside out. Over the years the inside narrows with corrosion, water pressure drops, and the pipe walls get thinner.

How to check: Galvanized pipe is dull gray metal with threaded joints. Signs of trouble include low water pressure, rusty or brown water when you first turn on a tap, and leaks at the threaded connections.

Repair or replace? Once galvanized pipe starts leaking, more leaks usually follow. Replacing a section can buy time, but a whole-house repipe is often the better value.

3. Braided and plastic supply lines

The short flexible hoses that connect your toilets, faucets, ice maker, and washing machine to the shutoff valves are some of the most overlooked parts of a home's plumbing. They're cheap, easy to install, and easy to forget about for 15 years.

Braided stainless lines can corrode or fray, and the rubber inside them ages. Older plastic supply lines can crack, especially at the nut where they connect. Washing machine hoses are a common source of water damage because they stay under pressure all the time.

How to check: Look for kinks, bulges, rust spots, fraying, or dampness at the connections. Check the manufacture date or replacement guidance printed on the line or its packaging if you have it. If you don't know how old they are, that alone is a good reason to replace them.

Repair or replace? Replace. Supply lines aren't something you repair. Swapping them out costs very little compared to the floor, cabinets, and drywall a failed line can ruin.

4. Shutoff valves that won't shut off

Behind every supply line is a small shutoff valve. Older multi-turn valves often seize up after years of sitting untouched. If one fails while you're trying to stop a leak, a small problem can become a big one.

How to check: Gently try turning the valves under your sinks and behind your toilets. If they won't move, drip when you turn them, or don't fully stop the water, they're due for replacement. And make sure everyone in the house knows where the main water shutoff is.

5. Exposed pipe in crawlspaces, garages, and outside walls

Even good pipe can freeze if it's in the wrong place. In our area, the most common spots are:

• Supply lines running through a vented crawlspace

• Pipes along exterior walls, especially under kitchen and bathroom sinks

• Lines in unheated garages, attics, or additions

• Outdoor spigots without frost-free valves

What helps: Foam pipe insulation on exposed crawlspace and garage runs, sealing gaps where cold air gets in, repairing crawlspace vents and doors, and upgrading outdoor spigots to frost-free sillcocks. If you have a crawlspace, our post on crawlspace moisture and soft subfloors covers what else to look for while you're down there.

Warning signs your plumbing is near the end

You don't need to wait for a burst pipe to know your plumbing needs attention. Watch for:

• Water pressure that has slowly gotten weaker

• Discolored water when you first run a tap

• Small drips or green or white crust on fittings

• Water stains on ceilings below bathrooms, or soft spots in floors near toilets and tubs

• A water bill that climbs without a clear reason

• Pipes that bang or rattle when water shuts off

Any one of these is worth a closer look, especially before the first hard freeze.

When it makes sense to call a licensed plumber

Swapping a washing machine hose is a reasonable DIY job for a lot of homeowners. Replacing polybutylene or galvanized lines, installing frost-free spigots, rerouting pipe away from exterior walls, or replacing seized shutoff valves is work for a licensed plumber.

Rapid Refurb is licensed for plumbing work, so we can inspect your supply lines and pipe, give you an honest repair-or-replace recommendation, and handle the work ourselves. And because we're also a restoration and renovation company, if a pipe has already caused damage, we can repair the plumbing and put the floors, walls, and cabinets back together too.

Get ahead of winter

The best time to replace old pipe is before it fails, not after. A planned plumbing upgrade on a schedule that works for you costs far less, and is far less stressful, than tearing out wet drywall after a cold snap.

If you're in Greensboro, Randleman, or anywhere in Guilford or Forsyth County and want someone to take a look at your plumbing before winter, give Rapid Refurb a call at 336-951-8534 or email estimates@igotrefurbed.com to schedule an estimate.