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Trusted Plumber in Longmont, CO
When your pipes spring a leak or your drains stop flowing properly, Longmont homeowners need a fast, dependable solution. Mountain Valley Plumbing, Heating and Cooling provides expert residential plumbing repairs, replacements, and new installations. Our licensed technicians offer same-day service when schedules allow, with clear communication and absolute respect for your home.
We stand behind our work with our Safe Clean Home Guarantee. Your property stays protected and clean throughout every job.
Why Longmont Homeowners Trust Mountain Valley

Longmont Emergency Plumbing Support
Urgent plumbing issues require immediate action. True emergencies include active pipe leaks, burst lines, sewer backups, leaking water heaters, or a sudden loss of running water. Mountain Valley provides same-day service during regular business hours to restore your plumbing system as quickly as possible.
While waiting for our team, take these immediate safety steps:
- Avoid standing water near electrical panels, outlets, or appliances.
- Shut off the main water valve, typically found in your basement or crawlspace on the street-facing side near the water meter.
- Isolate the issue by turning off local valves behind individual sinks, toilets, or appliances.
Once you’ve secured your water supply, contact us to schedule a qualified plumber in Longmont, CO. Let our dispatch team know what’s leaking, where it’s located, and whether the main water valve has been shut off so we can prepare before arriving.
Residential Plumbing Services in Longmont
Mountain Valley’s residential plumbing team handles everything from everyday repairs to complete plumbing system replacements. Our licensed technicians proudly serve homeowners throughout Longmont with flat-rate pricing, so you’ll always know the cost before any work begins.
Drain and sewer clearing: We clear stubborn drain and sewer line blockages using professional equipment to restore proper flow as quickly as possible.
Leak detection:We locate hidden water line leaks using advanced diagnostic methods to help protect your home from costly water damage.
Water heater service:We repair, replace, and install traditional tank and energy-efficient tankless water heaters.
Sump pump repair and installation: We install, repair, and maintain reliable sump pumps to help keep your basement dry and protected.
Beyond these core services, we also repair toilets, faucets, and garbage disposals while providing whole-home repiping and water filtration installations. Call (970) 317-2519 today to request an estimate for your Longmont home.
What to Expect During Your Longmont Service Call
From your first call to the completed repair, you’ll receive clear communication, respect for your home, and flat-rate pricing before any work begins.
- Schedule: Contact our local dispatch team to book your service and describe your system symptoms.
- Assess: A clean, background-checked technician arrives on time, thoroughly diagnoses the issue, and explains the findings.
- Quote: You receive flat-rate, upfront pricing before repairs start. A standard diagnostic fee applies.
- Complete: We perform the repairs and test the system, backed by our Safe Clean Home Guarantee.
If your project involves a major replacement, such as installing a new water heater, the City of Longmont requires a building permit and safety inspection. Our team handles the paperwork and coordinates the inspection to help keep your project compliant with local requirements.
Frequently Asked Questions About Longmont Plumbing
Do you offer 24/7 emergency plumbing in Longmont?
We do not offer 24/7 emergency plumbing services, but we do provide priority same-day scheduling during regular business hours whenever availability allows. If you’re dealing with an active leak, call our dispatch team immediately to check appointment availability. Before we arrive, shut off your main water valve if it’s safe to do so and avoid standing water near electrical panels or outlets.
Do you charge a diagnostic or service fee?
Yes. We charge a standard diagnostic fee for a licensed plumber to inspect your plumbing system. After the evaluation, you’ll receive a clear, flat-rate quote before any work begins, so you’ll know the full repair cost without unexpected hourly charges.
How fast can a plumber get to my Longmont home?
We frequently accommodate same-day plumbing service requests in Longmont, although appointment availability depends on daily demand. Calling early in the day gives you the best chance of securing the earliest available appointment. We’ll also keep you updated and let you know when your technician is on the way.
Do I need a permit to replace a water heater in Longmont?
Yes. The City of Longmont requires a building permit and safety inspection for all water heater installations. These requirements help ensure safety features, including temperature and pressure relief valves and expansion control systems, comply with local building codes. Our team handles the permit paperwork and coordinates the final inspection to help keep your project compliant.
Does Longmont have hard water? Do I need a water softener?
Longmont’s municipal water supply is generally considered soft, so most homes connected to the city system do not need a water softener. If your property uses a private well, we recommend a professional water test to check for hard minerals. We also offer customized water filtration and conditioning solutions to help improve your home’s water quality.
What should I do if a drain keeps backing up?
A drain that repeatedly backs up usually requires professional diagnostic equipment rather than a standard plunger. While simple clogs are often easy to clear, recurring backups may indicate deeper sewer line problems, such as root intrusion. Visit our drain cleaning page to learn more about our professional cleaning solutions or schedule a camera inspection.
Ready to fix your plumbing problem?
Mountain Valley Plumbing is your trusted local plumber in Longmont, CO, providing flat-rate pricing, experienced technicians, and same-day service when schedules allow. Contact us today to schedule your appointment.






