Commercial Plumbing in Denver, CO

Common commercial calls

• Grease-heavy kitchen drains that back up during service.
• Restroom fixtures, flush valves and running toilets in high-traffic buildings.
• Commercial water heaters and recirculation systems.
• Main line stoppages that affect a whole building or several tenants.
• Leaks behind walls or above ceilings in multi-story spaces.
• Backflow assembly testing, repair and replacement.

Backflow rules for businesses

Denver Water requires an approved backflow prevention assembly on commercial, industrial, irrigation and fire line services. Each assembly must be tested at installation and every year after that by a certified tester, and the results go to Denver Water's Cross-Connection Control office. Fire line assemblies need a tester who also holds a Colorado Fire Suppression System Contractor-Backflow certification. Building owners and property managers with several assemblies often line up testing on one schedule.

Permits work differently

Denver Community Planning and Development offers quick permits online, but for multifamily and commercial buildings those are limited to like-for-like replacements. Gas-fired water heaters in multifamily or commercial buildings go through a separate Building Log route. Anything beyond a straight swap, such as new fixtures, relocated lines or added capacity, usually needs plan review. A plumber familiar with commercial work can tell you which path a job falls under.

Keeping downtime short

Sewer and water emergencies

If a water main or meter problem appears to be on the utility's side, Denver Water takes emergency calls at 303-628-6801. Backups inside the building or in the private line to the city main are plumbing repairs. Denver Wastewater Management runs the public sewer and can answer questions about a particular property.

What drives commercial pricing

Cost depends on the type of building, after-hours timing, access to ceilings and chases, the size of the pipe or equipment, permit requirements, and whether the work has to be staged around tenants or business hours.