Denver metro · Boulder County · Northern Colorado
Plumbing problems, sorted before they spread.
Burst pipe, sewer backup or no hot water? One call connects you with a licensed plumber who serves your ZIP code and explains the problem before any work starts.
- Call now to check plumber availability
- Licensed Colorado plumbers
- The problem explained before work starts
Is your home covered?
Plumbers on Thawline cover 276 ZIP codes from Castle Rock to Greeley.
18
towns with local pages
19
plumbing services
$0
to call or request
Water spraying or backing up right now?
Shut off your main water valve first. Where to find it. Then call.
Services
What plumbers here fix most
From frozen pipes in January to sprinkler backflow in April, these are the calls Front Range homes make every year.
Leaks, pipes & freezing
Burst and frozen pipes, hidden leaks, repiping and the main water line.
Burst pipe repairDrains & sewer
Clogs, root intrusion, camera inspection and sewer line repair.
Drain cleaning
Water heaters
Tank and tankless repair, replacement and high-altitude venting.
Water heater repair
Toilets, faucets & disposals
Running toilets, dripping faucets, sinks and garbage disposals.
Toilet repair
Outdoor & seasonal
Frost-free hose bibs and backflow testing for irrigation systems.
Frost-free hose bib repair
Basements & sump pumps
Sump pump repair and replacement for wet Front Range basements.
Sump pump service
Gas lines
Gas leaks, new appliance hookups and gas line repair.
Gas line repair & installationProblem finder
What are you seeing?
Match the symptom to the likely cause, the service that fixes it, and a guide for what to do first.
- What to do when a pipe burstsBurst pipe repair
Water spraying or dripping from a ceiling or wall
Likely: Burst or split supply pipe
- How to prevent frozen pipes in a Colorado winterFrozen pipe thawing
No water at one faucet after a cold night
Likely: Frozen pipe in an exterior wall or garage
- Why is my basement floor drain backing up?Drain cleaning
Basement floor drain filling up
Likely: Blocked main sewer line
- No hot water? What to check firstWater heater repair
No hot water
Likely: Pilot, gas valve, element or thermostat
- High water bill? How to find a hidden leakLeak detection
Water bill jumped for no reason
Likely: Hidden leak, running toilet or irrigation
- Sump pump not working? Causes and fixesSump pump service
Sump pit full and pump not running
Likely: Stuck float, failed motor or frozen discharge
- Should you get a sewer scope before buying a home?Sewer camera inspection
Same drain clogs every few months
Likely: Roots, grease or a damaged section of pipe
- How to winterize outdoor faucets and sprinklersFrost-free hose bib repair
Leak inside the wall when using the outdoor faucet
Likely: Split frost-free hose bib
How it works
One call, the right plumber
Thawline is a free referral service. Here's what happens when you reach out.
- 1
Tell us the problem
Call or send a request with the problem and your ZIP code. Emergencies get a short path.
- 2
Get connected
You're connected with an independent, licensed plumbing company that serves your area.
- 3
Hear the diagnosis
The plumber explains what's wrong and agrees a price with you before starting.
- 4
Work gets done
The plumbing company does the work, pulls any permits and stands behind its job.
Service area
From Castle Rock to Greeley
Licensed plumbers on Thawline serve the Denver metro & Northern Colorado. Check your ZIP or pick your town.
North metro
South & east metro
Northern Colorado
Before & after
What a fix looks like
Drag the slider to compare. These are example stock photos to show the kind of work involved, not Thawline or partner jobs.
Corroded steel pipe → new copper runs
Galvanized steel rusts from the inside until pressure drops and water turns brown. A repipe replaces it with copper or PEX. Repiping
Example photos · not our jobs
Dripping faucet → new faucet and supply lines
A worn cartridge causes a constant drip. Older faucets are often replaced along with their supply lines and shutoff valves. Faucet & sink repair
Example photos · not our jobs
Colorado plumbing
Why Front Range plumbing is different
Fast, hard freezes
Arctic fronts drop temperatures 30–40 degrees in hours, often after a mild day. Pipes in exterior walls, garages and crawl spaces freeze first.
Prevent frozen pipesClay pipe and big trees
Many pre-1970 neighborhoods still have clay sewer laterals, and mature street trees send roots into every joint.
Sewer camera inspectionExpansive soils
Front Range bentonite clay swells and shrinks, shifting slabs and stressing buried sewer and water lines.
Sewer line repairAltitude and gas appliances
At 5,000–6,000+ feet, gas water heaters and tankless units must be sized and vented for elevation.
Tankless water heatersGuides
Know what to do first
Emergencies
What to do when a pipe bursts
Shut off the main water valve, open the lowest faucet in the house to drain the lines, turn off the water heater, and cut power to any room where water is reaching outlets. Then call a plumber, photograph the damage, and call your insurer.
Winter & freezing
How to prevent frozen pipes in a Colorado winter
Before the first hard freeze, disconnect hoses, blow out the sprinkler system and seal air leaks near pipes. During a cold snap, keep the heat at 55 °F or higher, open cabinet doors on exterior walls, and let faucets on outside walls drip.
Drains & sewer
Why is my basement floor drain backing up?
When water comes up through the basement floor drain, the main sewer line is usually blocked between the house and the street. Stop using water upstairs, then call a plumber to clear the main line. If it happens more than once, a camera inspection shows the cause.
FAQ
Common questions
How Thawline works, what it costs, and who does the work.
How does Thawline work?
Does it cost anything to use Thawline?
Which areas are covered?
Are the plumbers licensed?
Will I get a price before work starts?
Water where it shouldn't be? Start with a call.
Tell us what's going on and your ZIP code. You'll be connected with a licensed plumber who serves your area.
Call now to check plumber availability