Water Pressure Testing & Diagnosis in San Antonio, TX
Low pressure at one faucet and low pressure across the whole house are two different problems with two different fixes. Testing finds which one you have — before any repair is suggested.
What Water Pressure Testing Involves
Pressure testing measures how hard water is pushing through your pipes, at rest and while water is running. A gauge is fitted to an outdoor spigot or a laundry connection, and readings are taken at several points: at the main where water enters the home, at fixtures on different floors, and on hot and cold lines separately. The pattern of the readings is what points to the cause.
Static pressure — the reading when no water is running — tells us what the street is delivering. Running pressure — the reading while a faucet or shower is open — tells us how much pressure is lost inside your home's pipes. A healthy home usually reads about 40 to 60 PSI at the fixtures. A big drop between the main and a fixture means something between those two points is restricting flow. That is the core of our water pressure repair service: find the restriction first, then fix the right thing.
Testing also covers the pressure regulator. We check whether the PRV is holding a steady pressure or drifting, and whether it responds when it is adjusted. A regulator that will not hold its setting is worn out, and no amount of cleaning elsewhere will fix the pressure until it is dealt with. See pressure regulator repair and replacement for what that job involves.
Signs That Testing Is the Right First Step
- Pressure is low at some fixtures and fine at others, and you do not know why.
- Pressure has been getting worse over months, a little at a time.
- Someone has already cleaned an aerator or replaced a showerhead and the problem came back.
- You are deciding between a booster pump, a pipe descaling job, or repiping, and you want to know which one your home actually needs.
- Your water bill has risen along with the pressure drop, which can point to a leak.
How a Diagnosis Visit Works
- We talk through the symptoms. Which fixtures, hot or cold, sudden or gradual, upstairs or downstairs — the pattern narrows the search before we pick up a gauge.
- We measure at the main. A gauge on an outdoor spigot shows what pressure is arriving at your home from the street main.
- We measure at fixtures. Readings at several fixtures show where pressure is lost — at one fixture, in one part of the house, or everywhere.
- We check the regulator and shutoff valves. A partly closed valve or a failed PRV is a common cause and a simple one to confirm.
- You get a plain explanation and a price. We tell you what we found, what repair fits the cause, and what it will cost before any work starts.
Testing is done during the visit, before any repair is suggested. If the cause turns out to be something simple — a partly closed valve, a clogged aerator — we tell you that, too.
Why Testing Matters in San Antonio
San Antonio water is very hard, about 280 to 300 parts per million, and it leaves scale in pipes and fixtures. Scale, old galvanized pipe, a failed regulator, and a hidden leak can all produce the same symptom: a weak shower. Guessing at the cause wastes money. In older areas such as Monte Vista and Alamo Heights, galvanized pipe is a likely cause. In newer areas such as Stone Oak, scale and regulator problems are more likely. Testing tells us which story your home fits.
Related Services
Depending on what testing finds, the repair may be a pressure regulator repair or replacement, pipe descaling, leak detection and repair, or whole-house repiping. If only one fixture is affected, see fixture low pressure repair.
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
What is normal water pressure for a home in San Antonio?
Most homes are designed for about 40 to 60 PSI at the fixtures. Above 80 PSI, plumbing codes commonly call for a pressure regulator to protect pipes and fixtures. A gauge reading below 40 PSI at a fixture, when the street supply is healthy, means pressure is being lost inside the home.
How long does pressure testing take?
Testing itself usually takes well under an hour. It is done during the visit, along with the discussion of what we found and what the repair would involve.
Will testing tell me if I need a booster pump?
Yes. If pressure at the main is already low when nothing is running, the street supply is the limit, and a booster pump is the usual answer. If pressure at the main is healthy but low at the fixtures, the problem is inside the home and a booster pump would not fix it.