Pipe Descaling & Clogged Pipe Cleaning in San Antonio, TX
San Antonio's very hard water leaves mineral scale inside pipes, and over time that scale closes the pipe from the inside. Descaling removes the buildup and restores flow — when the pipe is still sound enough to keep.
What Pipe Descaling Is
Descaling is the cleaning of mineral buildup from the inside of water pipes. In San Antonio, where water runs about 280 to 300 parts per million of hardness, calcium and magnesium settle out of the water and form a hard crust on the inside of pipes, valves, and fixtures. A pipe that started with a half-inch opening can end up behaving like a much smaller one. Water still gets through, but slowly — and pressure at the faucet drops.
Descaling uses cleaning methods suited to the pipe and the amount of buildup, and it is often combined with cleaning or replacing scaled aerators, showerheads, and valves. It is the right job when the pipe itself is still in good shape and only the inside is restricted. When the pipe is corroded or failing, cleaning will not save it — that is a job for whole-house repiping. Part of low water pressure repair in San Antonio is knowing which of the two your home needs, and testing comes before either one.
Signs Your Pipes May Be Scaled
- Pressure has fallen slowly over years, not suddenly.
- White crust on faucets, showerheads, and around fixture bases.
- Spots on dishes and glassware, and soap that does not rinse clean.
- Hot water pressure is worse than cold — scale forms faster in hot water.
- Your home has copper or PEX pipe in reasonable shape, but flow is poor.
- A water softener was never installed, and the home has had hard water for years.
How Descaling Works
- We test and inspect. Pressure readings and a look at the pipe and fixtures show how much of the problem is scale and how much is something else, such as a failed regulator or old galvanized pipe.
- We clean the buildup. Scale is removed from the affected lines and from fixtures, aerators, and valves, using methods suited to the pipe material.
- We check flow again. Pressure and flow are measured after cleaning so you can see what the cleaning achieved.
- We talk about prevention. A water softener stops new scale from forming, which protects the cleaning you just paid for.
Descaling is not a one-time cure for hard water. Without a softener, scale will build up again over time. We will tell you honestly how much improvement to expect and how long it is likely to last.
Related Services
Descaling and softening go together: see water softener installation for stopping scale at the source. If pressure is low at one fixture only, the fix may be simpler — see fixture low pressure repair. If testing shows the pipe is corroded rather than scaled, see whole-house repiping. If the regulator is the problem, see PRV repair and replacement. Scale builds up across the city, including in Stone Oak and Monte Vista homes, where hard water has had years to work on the pipes.
Call San Antonio Water Pressure Pros
Tell us what your water pressure is doing, and we will talk through what happens next and set a time to come to your home.
14570 Calaveras Creek, San Antonio, TX 78223
Frequently Asked Questions
Will descaling fix low pressure in old galvanized pipes?
Usually not for long. Galvanized pipe narrows from rust, not just scale, and the rust keeps closing the pipe after cleaning. Descaling helps most with copper and PEX pipe that is sound but scaled. If your home has galvanized pipe, repiping is usually the better answer.
How often does descaling need to be done?
It depends on how hard your water is and whether you have a softener. In San Antonio, without a softener, scale builds up steadily and cleaning may be needed again in a few years. With a softener, buildup slows sharply.
Is descaling safe for my pipes?
When the method matches the pipe material, yes. That is why we inspect and test first — the cleaning approach for copper is different from the approach for PEX or galvanized pipe, and using the wrong one can damage the pipe.