Last updated: 2026-10-10
South Carolina Plumbing is a referral service that connects South Carolina homeowners, landlords, and property managers with participating independent plumbing professionals. This page covers the everyday plumbing repairs that make up most service calls: what usually causes them, what a plumber does, and what affects the price.
Common plumbing repairs
Most service calls fall into a handful of categories:
- Leaks at supply lines, shutoff valves, faucet connections, and drain traps under sinks.
- Running or leaking toilets: worn flappers and fill valves, loose tank bolts, or a failed wax ring at the base.
- Low water pressure at one fixture (often a clogged aerator or cartridge) or the whole house (a failing pressure-reducing valve, a partly closed valve, or old pipe).
- Noisy pipes: banging when a valve closes (water hammer) or whistling from high pressure.
- Fixture replacement: faucets, shutoff valves, toilets, and garbage disposals.
- Outdoor plumbing: leaking hose bibs and frost-damaged exterior faucets.
Why small leaks matter
A slow drip is easy to ignore. The EPA's WaterSense program estimates the average household's leaks waste more than 9,300 gallons of water a year, and that nine percent of homes have leaks wasting 50 gallons or more a day (EPA WaterSense). Beyond the water bill, a leak inside a cabinet or wall rots subfloor and grows mold long before it shows.
Water pressure: what's normal
Residential water pressure is commonly kept between about 40 and 80 psi. Plumbing codes based on the International Plumbing Code call for a pressure-reducing valve when street pressure exceeds 80 psi, because high pressure stresses fittings, appliances, and water heaters. A plumber can test your pressure with a gauge on an outdoor faucet in a few minutes.
When to call a plumber
- A leak you can't stop by tightening a nut or closing a fixture valve
- Low pressure throughout the house, not just one faucet
- A toilet that rocks, leaks at the base, or runs after you've replaced the flapper
- Shutoff valves that won't close or leak when you turn them
- Banging or whistling pipes
- Any repair over $500, which in South Carolina requires a licensed plumber
What plumbing repairs cost
HomeAdvisor's 2026 data puts the average plumber visit at $341, with most between $182 and $501, and toilet repairs typically $100 to $300 (HomeAdvisor, 2026). Many plumbers charge a service call fee of $100 to $250 that covers diagnosis and often the first hour.
- Whether the fix is a part swap or requires opening a wall or cabinet
- Fixture and part prices you choose
- Time of day: after-hours work adds $100 to $300 or more
- Age of the plumbing: corroded valves and old pipe turn small jobs into bigger ones
Safety and what to do while you wait
- Close the fixture's shutoff valve if it has one, or the main if it doesn't.
- Put a bucket and towels under active drips and empty the cabinet below.
- Turn off power to a garbage disposal or electric water heater before anyone works near it.
- Don't overtighten old plastic or brass fittings; they crack.
- Note when the problem started and what changed, which helps the plumber diagnose it faster.
Questions to ask the plumber
- Is your South Carolina plumbing license current? (Check it free on the SC LLR license lookup.)
- What's the service call fee, and is it credited toward the repair?
- Will you give me the price in writing before you start?
- Do you charge flat-rate or by the hour?
- Should I replace this fixture or valve rather than repair it?
- What warranty comes with the parts and labor?