Done’s plumbing team handles the full range of toilet repairs that Denver-area homeowners run into — from running toilets and weak flushes to complete toilet replacements and wax ring failures. Most toilet problems are straightforward to diagnose and fix when you have the right parts and experience, and getting them repaired promptly prevents water waste, higher bills, and potential floor damage.

Running Toilets and Phantom Flushes

A toilet that runs continuously or refills on its own — sometimes called a phantom flush — is one of the most common calls Done receives. The culprit is almost always a worn flapper, a faulty fill valve, or an improperly adjusted float. While these sound like simple DIY fixes, getting the parts right matters: low-flow toilets common in newer Colorado homes use flappers with specific sizing, and a wrong-size replacement causes the same running problem to continue.

A running toilet can waste hundreds of gallons of water per day. At Denver Water rates, that adds up quickly on your monthly bill. Done’s plumbers diagnose the exact cause and replace the right components so the fix lasts.

Weak Flush, Clogs, and Slow Drains

A toilet that clogs repeatedly or drains slowly is telling you something. Occasional clogs are normal, but if you’re reaching for the plunger every few days, there is likely a partial obstruction in the trap or drain line — or, in older Denver homes, a buildup of mineral scale inside the toilet’s rim jets that reduces flush pressure. Done can clear the obstruction and assess whether the issue is in the toilet itself or further down the drain line.

For persistent sewer-related backup, the problem may be beyond the toilet entirely. Done’s team can run a camera inspection to identify root intrusion, offset joints, or buildup in the main line — a common issue in older neighborhoods with clay or cast iron sewer pipes.

Leaks at the Base or Tank

Water pooling at the base of a toilet almost always points to a failed wax ring — the seal between the toilet and the floor flange. This is not a repair to put off. Water leaking at the base soaks into the subfloor over time, causing rot and mold that turn a simple wax ring replacement into a much larger flooring repair. Done replaces wax rings and also inspects the floor flange to make sure it’s intact and properly anchored.

Leaks at the tank — either where it meets the bowl or around the supply line connection — are typically caused by deteriorated tank bolts, a cracked tank gasket, or a loose supply line fitting. These are quick repairs when caught early.

Toilet Replacement and Upgrades

Sometimes repair is not the right answer. If a toilet is cracked, extremely old, or has been repaired multiple times, Done can help you choose a replacement that fits your bathroom rough-in, matches your water pressure, and meets Colorado’s plumbing code requirements for water efficiency. Older toilets often use 3.5 gallons per flush or more; current models use 1.28 gallons and perform better.

  • Flapper and fill valve replacement for running toilets
  • Wax ring replacement and floor flange inspection
  • Tank bolt and gasket repair for leaking tanks
  • Clog clearing and slow-drain diagnosis
  • Full toilet replacement and installation
  • Supply line replacement and shutoff valve service

When to Call Done Instead of DIYing

A running toilet where you’ve already swapped the flapper and it’s still running, any leak at the floor, a toilet that rocks when you sit on it, or multiple clogs in a short period — those are all situations where a professional diagnosis saves time and prevents bigger problems. Done’s plumbers carry the parts to handle most toilet repairs in a single visit.

For toilet repairs, new installations, or a full bathroom plumbing checkup, Done’s kitchen and bath plumbing team is ready to help. Visit our kitchen and bath plumbing page to learn more, or check out emergency plumbing if you’ve got an active leak that can’t wait.