Open 24/7 · San Marcos, TX
Plumber in San Marcos, TX
Looking for a plumber in San Marcos? Most households here rent, the water is on the hard side and several suppliers share the map. Phone whenever it happens, give the address and the owner, and see what is free today.
Emergency? Call now, 24/7(737) 717-0737- Call and give the addressSay if you rent and whether the landlord has been told.
- Describe what is failingNo hot water, drain, leak, toilet or low flow.
- A visit gets scheduledSame-day service is available, and running water is seen first.
A plumber in San Marcos for rental and owner homes alike
Four services cover the calls we hear most from San Marcos. The full list is further down the page.
Water heater repair
Gets hot water back in houses, duplexes and apartments.
Water heater repair details →Water filtration
Handles hard-water film, taste and sediment at the tap.
Water filtration details →Drain cleaning
Clears sinks, tubs and floor drains that back up.
Drain cleaning details →Toilet repair
Fixes running, leaking and weak-flush toilets.
Toilet repair details →What is going on at your San Marcos address?
Pick the closest card. Red ones need quick action.
Why call a plumber in San Marcos on one number
Renters, owners and landlords all end up on the same phone. We keep that call short.
- Open 24/7Pipes do not break on office hours. A person answers at any time.
- Same-day service is availableSay what failed and ask which visit times remain.
- All plumbing jobs on one lineHeater, drain, toilet and leak work, together.
- Questions that fit a rental townWe ask who owns the building and how to reach them.
- A call, not a formNothing to type while the floor is wet.
Calling a plumber in San Marcos compared with searching and waiting
Six differences that show up when water is already on the floor.
| UsOnion Creek Plumbing | vsMany other plumbing companies | |
|---|---|---|
| Hours | Open 24/7Nights and weekends included. | Weekday hours |
| Reaching someone | A voice picks upExplain once and get direction. | A form that gets answered later |
| How soon | Same-day service is availableFloods and clogged mains come first. | Booked next week |
| Jobs covered | Every plumbing job on one numberNo second call when a repair uncovers another fault. | A specialist per task |
| Local knowledge | Knows the city supplies most addresses but other systems cover some streetsThat changes which water report to read. | One-size advice |
| Price clarity | The cost drivers sit in the section below; actual pricing is a phone question.Reasons come before numbers. | A bare figure |
Based on what is typical. Individual companies vary.
How the call runs
Four steps from first ring to plan.
You call
From a house, an apartment or a duplex.
You describe the problem and the building
Who owns it, what failed, which floor, what you can see.
A time is arranged
Same-day service is available.
The plumber explains
The fault, the fix and what drives cost.
What moves the price of a plumber in San Marcos
Small jobs and large ones part ways for a handful of reasons.
The size of the fault
A flapper is short work. A leak behind tile is not.
Access
Closets, crawl spaces and slabs each change the effort.
Parts
Cartridge, valve, element or full tank. Quality varies.
Diagnosis
Hidden leaks and slow drains may need a test or a camera first.
Urgency
Water spreading needs action now. A drip can wait for a time slot.
Have this ready for the call
- Street and apartment number
- Own or rent
- Shutoff valve location, if known
- The symptom in your own words
Ask about pricing when you call.
Call now, 24/7(737) 717-0737In San Marcos, most households rent, so the first call is often a tenant’s
What the census count suggests
The owner-occupied rate in San Marcos is 30.8 percent, so most households rent. What matters for plumbing is who has to act. A renter can close a valve and call, but the repair itself often needs the landlord to agree, and the lease usually says who pays for what.
Plumbers answer to the person on the phone, not to the lease. Give the plumber the owner or manager’s contact if you have it. If you do not, photograph the problem so you can show the owner what happened.
| Who you are | What to do first | What to tell us |
|---|---|---|
| Tenant in a house | Stop the water and message the owner | The owner’s name, if you know it |
| Tenant in a complex | Locate the unit shutoff | Building and unit number |
| Owner living there | Stop the water and call | Age of the fixture or heater |
| Landlord on another street | Ask the tenant for photos | The address and a contact for the tenant |
Turnover week and move-in checks
The weeks around a lease change are when hidden faults show up. Water that sat unused in a heater smells off, a toilet that nobody flushed has a dry seal, and a drain that grew a film of grease can slow the first dishwasher cycle. Run every tap and toilet for a minute, look under each sink for damp, and check the heater closet. If something looks wrong, the leak-finding guide covers a quick meter test.
- Run every tapHot and cold for a minute each.
- Flush each toiletListen for a refill that never stops.
- Look under sinksDamp wood or a white crust signals a slow leak.
- Open the heater closetCheck for water on the floor.
The City of San Marcos runs the water, and it is in the hard range
Sources and the supplier
The city’s Utilities department handles water, wastewater and electric service. Its water comes from more than one place: Canyon Lake supply through the Guadalupe-Blanco River Authority, Edwards Aquifer wells and Carrizo-Wilcox Aquifer supply through Alliance Regional Water Authority. The mix is the reason no one number describes every tap. Other systems also operate inside the address area, including the Crystal Clear and Maxwell utilities and some small neighbourhood systems.
Which supplier is yours depends on the street. The name on your water bill is the answer.
| Item | What is known | What to do with it |
|---|---|---|
| City sources | Canyon Lake via GBRA, Edwards wells, Carrizo-Wilcox via ARWA | Expect a blend that shifts over time |
| Other systems | Several others serve parts of the address area | Check your bill before reading a report |
| Hardness for city water | Roughly 11 to 15 grains per gallon | Hard water; ask the supplier for current numbers |
| Wastewater | City plant discharges to the San Marcos River | Ask the city which main your line joins |
What roughly 11 to 15 grains per gallon does
That range puts the water firmly in hard territory. It deposits scale on showerheads and glass, and it coats heater elements. The effect in a rental is subtle until something fails: a tenant sees weak hot water, and the plumber finds the element wrapped in crust. A heater repair can restore it, but scale returns unless something changes. Options run from a lower thermostat setting to a point-of-use filter to a whole-house softener, and water filtration and softener installation explain the difference. The Texas hard water guide covers the signs.
- Weak hot waterOften a scaled element.
- Spotting on glassDishwasher rinse aid helps, a filter helps more.
- Dripping faucetCartridge worn by mineral grit.
- Ask the landlordA softener is a building decision.
Your drain, the lateral and the city main
Where a blockage can hide
The city treats wastewater at its own plant and sends the treated water to the San Marcos River. Between your sink and that plant are three parts: the drain inside the house, the line out to the street and the city main. A gurgle at one fixture can mean any of them. Which part belongs to whom depends on the property, so ask the city utility where responsibility ends at your address before you assume.
The first test is simple. If one fixture is slow, the clog is local. If a tub and a toilet both gurgle when the washer drains, the shared line is the suspect. A sewer camera inspection settles it.
| What you see | Where it likely sits | Next page |
|---|---|---|
| One slow sink | That fixture’s trap or branch | Clogged drain |
| Tub and toilet gurgle together | The shared branch or main drain | Drain cleaning |
| Back-ups after heavy use | The line to the street | Sewer line repair |
| Greasy kitchen line that keeps clogging | Grease built up in a long run | Hydro jetting |
Rental kitchens and the grease habit
Shared kitchens, large households and frequent cooking put grease into the drain faster than a home can wash it out. Hot water melts fat, then it cools further down the pipe and coats the wall. The coating narrows the pipe until a normal evening of dishes overwhelms it. Scraping plates into the bin, wiping pans with paper first and running hot water with soap for a minute afterward all help. The drain guide shows what to try before calling.
Scrape first
Fat and food go in the bin, not the sink.
Wipe greasy pans
Paper towel before the wash.
Run hot water
A minute of hot water after each wash.
Call when it repeats
A third clog this month means the line needs work.
All plumbing services for San Marcos addresses, by symptom
Every service on this list is reached through the same phone call. Use the pages for detail.
| If this is happening | It is probably | Page |
|---|---|---|
| Cold showers or a leak at the tank | Heater trouble | Repair, replacement, tankless |
| A bill that makes no sense | A hidden leak | Leak detection, slab leak, water line |
| A toilet that will not behave | Parts or a clog | Toilet repair, installation |
| Faucet, shower or tub trouble | Cartridge, seal or drain | Faucet, shower, tub drain |
| Disposal hums or jams | Jam or motor | Garbage disposal repair |
| Backups and bad smells | Drain or sewer | Sewer replacement, trenchless |
| Rust, weak flow or old steel pipe | Supply pipe wear | Pipe repair, repiping |
| Gas smell | Safety first | Gas leak, gas line |
| Business or backflow device | Commercial or safety | Commercial, backflow testing |
Three services with their own San Marcos pages
Each of these goes deeper on how the service plays out in this city.
Hot water
After hours
Water quality
Six situations and the first move for each
Water across the floor
Start with the main valve. See how to shut off your main valve.
Sewage in a tub
Halt every drain, step back and make the call.
Lukewarm or cold
Glance at the breaker or the pilot, then ring.
Gurgling pipes
Skip the laundry and showers until someone looks.
Smell of gas
Go outside, leave the lights alone and ring from there. See signs of a gas leak.
A pipe split
Shut the main, then read what to do when a pipe bursts.
We cover San Marcos and the towns around it
San Marcos is a short drive southwest of Kyle on the I-35 corridor. Calls from there, and from Buda, Maxwell and Wimberley, go to the same number.
This map shows San Marcos next to Kyle and the other towns we cover. For a plumber in San Marcos, one number answers at every hour.
- 1Buda about 7 mi
- 2Maxwell about 7 mi
- 3Manchaca about 9 mi
- 4Austin about 10 mi
- 5San Marcos about 11 mi
- 6Martindale about 11 mi
- 7Lockhart about 12 mi
- 8Dale about 15 mi
- 9Wimberley about 17 mi
- 10Bee Cave about 18 mi
- 11West Lake Hills about 21 mi
- 12Cedar Creek about 21 mi
- 13Kingsbury about 22 mi
- 14Dripping Springs about 23 mi
- 15New Braunfels about 24 mi
- 16Lakeway about 25 mi
- 17Canyon Lake about 25 mi
- 18The Hills about 25 mi
San Marcos plumbing questions
Is water in San Marcos hard?
Who runs water and sewer in San Marcos?
I rent. Can I call a plumber myself?
What does a plumber in San Marcos cost?
Why can the same repair cost more at one address?
Can I get same-day service in San Marcos?
What if the toilet overflows?
My landlord will not fix a leak. What do I do?
Can hard water ruin a new heater?
Do you replace tank heaters with tankless ones?
Where is your San Marcos location?
How do I reach a plumber in San Marcos at night?
Guides for San Marcos renters and owners
Call a plumber in San Marcos
Day, night or weekend. Ask a plumber in San Marcos about same-day service.