Why South St. Paul homes get repiped
The city's 2040 planning documents say about 74 percent of homes in South St. Paul were built before 1970. Homes of that period often used galvanized steel for water supply, and some had lead service lines or lead solder in copper joints.
Galvanized pipe corrodes from the inside. The bore narrows, pressure drops and rust discolors the water. Repiping removes the failing pipe and replaces the supply network, from the main shutoff to the fixtures.
Materials compared
Each material has a place.
| Material | Strengths | Watch for |
|---|---|---|
| PEX | Flexible, fewer fittings, works well in retrofits | Not for outdoor exposure, and needs correct fittings |
| Copper | Long track record, fire resistant | Higher material cost, and aggressive water can pit it |
| CPVC | Lower cost, corrosion resistant | Can become brittle with age and heat |
Minnesota's plumbing code, chapter 4714, sets which materials are approved for potable water.
How a repipe is staged
A typical whole-house repipe runs in phases.
Survey
We trace the lines, find fixtures and plan the layout.
Rough-in
New lines go in through walls, floors and the basement ceiling.
Cutover
We shut water briefly and connect the new network.
Repair and test
We pressure test, then patch drywall openings or hand that off to your contractor.
Lead and the service line
Repiping the inside of the house does not replace the service line between the street main and your home. South St. Paul's lead inventory lists roughly 740 lead lines and about 175 galvanized lines needing replacement as of October 2025, and the city's program may cover the private side with a signed agreement.
If you plan to repipe, call the city first. Coordinating the service line and the house piping can save you from opening walls twice. See water service line repair for the outside piece.
What affects repiping pricing
A repipe is quoted from a walk-through.
Insurance rarely pays for repiping due to age. Damage from a sudden covered leak may be handled separately.
How to get your house ready for a repipe
Small steps make the work go faster.
- Clear access to the basement ceiling, closets and under-sink cabinets
- Move furniture away from walls where pipe will be run
- Plan where you will wash and cook during the water shutoff
- Ask your plumber about drywall repair and who handles paint
- Take photos of existing pipe locations for your records
Partial repipe versus whole house
Some homes only need the worst section replaced, such as the basement run or the kitchen branch. A partial repipe costs less and can be the right call if the rest of the pipe is sound. The risk is that old pipe elsewhere may leak next.
A whole-house repipe replaces the supply network at once and ends the repair cycle. We look at the pipe material, the leak history and the water quality, then tell you which fits the house.
Sources for this page
Material approvals come from Minnesota Rules chapter 4714 and the Uniform Plumbing Code (UPC). The housing-age figure and the lead inventory numbers come from the City of South St. Paul's 2040 planning documents and utility pages.
What to do if a pipe leaks before the repipe
Do not wait for the project date if water is escaping.
- Close the main water shutoff and open a low faucet to drain the lines
- Place a bucket and towels under the leak and photograph the damage
- Call the 24/7 line for same-day or after-hours repair
- Tell your plumber a repipe is planned so the repair is kept small
Questions people ask
Repeated leaks, low pressure, rusty water or galvanized pipe in a house older than fifty years are the main signs.
Many houses take a few days. Partial repipes take less.
Only for part of the day while the old network is cut over. We plan the shutoff so you can use fixtures overnight where possible.
PEX approved for potable water is allowed under Minnesota's plumbing code when installed with the right fittings.
Yes. Our 24/7 line dispatches for active leaks, and we can isolate a failing section while you plan.
A repipe is a significant plumbing project, so ask the City of South St. Paul about permit requirements before work starts.