Capitol Hill has some of the oldest residential plumbing still in service anywhere in Denver. Mansions from the 1880s, Denver Squares from the early 1900s, Poet’s Row walkups and 1960s brick apartment blocks share the same street, each hiding a different set of pipes behind the plaster.
Prime Peak Plumbing is the Capitol Hill plumbing company homeowners, landlords and property managers call when something behind that plaster gives out. Licensed in Colorado, insured, available 24 hours a day.
Most companies treat Capitol Hill like any other Denver ZIP code, which is why repairs here fail within a year. The neighborhood runs from Broadway east to Downing Street and Colfax Avenue south to 7th Avenue, and it is Denver’s most densely populated. Age plus density creates specific problems.
Denver Water reports that homes built before 1951 are most likely to still have a lead service line running from the street main, and Capitol Hill is almost entirely from that era. Denver Water's Lead Reduction Program replaces those lines with copper at no direct charge. Our job on your side of the meter is to confirm the material, document it, and repair the interior plumbing connected to it.
Homes built between 1900 and 1950 were plumbed with galvanized steel, which rusts inward until the opening is the width of a pencil. You rarely see a leak first. You see pressure drop upstairs, hot water that browns for a few seconds, two fixtures that cannot run at once. The line has to be replaced with copper or PEX, and it is one of our most common Capitol Hill repairs.
Vertical stacks in Capitol Hill mansions and conversions are usually cast iron, which does not fail evenly. It corrodes along the bottom where waste sits, a pattern called channeling, so the top half can look healthy on camera while the bottom is paper thin. Where one stack serves six units, guessing is expensive.
Capitol Hill streets are lined with mature elms and silver maples planted long before anyone worried about roots and clay laterals. The joints shift as Denver's expansive soil swells and shrinks, and roots find every gap. The result is a drain that clears for a month and backs up again. A camera inspection tells us whether you need hydro jetting, trenchless lining or excavation.
A single Capitol Hill building can hold original 1890s cast iron, a 1960s galvanized repair, a 1980s copper patch and a 2015 PEX remodel done without a permit. Where two metals meet, corrosion accelerates, and the joints between eras are where leaks start.
Any fixture below the city sewer main needs an ejector pump to lift waste to the lateral, plus a backwater valve to stop a city side backup from entering the unit. Both fail quietly, and the first sign is usually sewage on a tenant's floor during a storm.
Denver's water builds mineral scale inside water heaters, faucet cartridges and shower valves. Here it compounds, because many heaters were sized for one household and now serve a subdivided building with four bathrooms. Annual flushing is the cheapest fix.
A burst supply line in a 1905 building does not wait for business hours. Our emergency line is answered by a person any hour, including nights, weekends and holidays.
Before we arrive. Shut the water off at the main, usually in the basement near the front foundation wall. If you smell gas, get everyone outside without touching switches, then call us and Xcel Energy.
Cast iron stacks with rough walls catch everything. We clear the line, then camera it to show you why it clogged.
Where a cable only punches through a root mass, jetting scours the full pipe wall back to bare pipe.
Every sewer job starts with a camera inspection, not a quote. Options include spot repair, trenchless lining, pipe bursting or excavation.
Tank and tankless, gas and electric. We spend as much time on sizing as installing, because many buildings here added bathrooms without upgrading the heater.
Acoustic and thermal equipment finds the source through the smallest possible opening, which matters with original plaster and woodwork.
Older buildings often have original black iron pipe, undersized runs and appliances added over decades without a load calculation. We install to Denver code.
Jams, leaks and hard stops. In older kitchens we also check whether the drain arm and trap can handle a disposal at all.
Grease line maintenance, backflow assemblies and commercial water heaters, scheduled around your hours.
Plumbing work inside Denver city limits falls under the Denver Building and Fire Code, based on the 2021 I Codes with Denver amendments. Permits come from Denver Community Planning and Development.
Permits are required more often than people expect. Water heater replacement needs one, as do sewer repairs, gas line work and repiping. Skipping it creates insurance problems and gets flagged at resale.
Your plumber needs a state license and city registration. Colorado licenses plumbers through the Division of Professions and Occupations, and Denver requires separate contractor registration.
Landmark status matters here. Denver’s permit application asks whether the property sits in a landmark or historic district, and parts of Capitol Hill do. We check before quoting exterior excavation.
We handle the paperwork, including the application and inspection.
We cover ZIP codes 80203 and 80218: the mansion blocks along Grant Street and Pennsylvania Street where Millionaire’s Row once stood, the Art Deco buildings of Poet’s Row on Sherman Street, the blocks east toward Downing and Corona, the area around the Molly Brown House Museum, and the Colfax corridor near the Fillmore Auditorium and the Ogden Theatre.
We also serve Uptown, North Capitol Hill, Cheesman Park, City Park West, Congress Park, Alamo Placita, Speer and the Golden Triangle near the Colorado State Capitol.
You get a firm price before work begins. Cost comes down to access, since a bulkhead basement off a narrow alley takes longer than a suburban garage; what is actually in the wall, since galvanized, cast iron, copper and PEX all repair differently; whether a permit is required; and time of day, which we tell you on the phone rather than on the invoice.
(720) 712-9007
We know old Denver plumbing. Galvanized supply, cast iron stacks, clay laterals and lead service lines are routine for us.
We diagnose before we quote. Camera inspections and pressure testing come first.
Licensed, insured and permitted. Colorado licensed, Denver registered, permits pulled on every job that needs one.
We answer the phone at 3 a.m. A real person, not a message service.
We respect the building. Floor protection and the smallest opening the job allows. Original plaster does not grow back.
Straight pricing. If a smaller repair solves your problem, we say so.
A slow drain in a Poet’s Row apartment or a burst line in an 1890s mansion at two in the morning. Prime Peak Plumbing is the plumbing company Capitol Hill calls.
Call (720) 712-9007 for 24/7 emergency and scheduled plumbing service in Capitol Hill, Denver.
Likely if it was built before 1951, and most of Capitol Hill was. Denver Water replaces those lines with copper at no direct charge.
Our 24 hour line is answered any time and Capitol Hill sits near the center of our service area.
Yes. We check landmark status before quoting exterior excavation. It affects the process, not whether the work can be done.
Regularly. We handle tenant coordination, shared stack issues, ejector pump service and maintenance across multiple units.
Yes. Cheesman Park, City Park West, Uptown, North Capitol Hill, Congress Park, Alamo Placita and the Golden Triangle are all in our service area.
