Running, leaking at the base, flushing weakly, or ready for replacement. We diagnose it, quote it in writing, and finish most jobs in a single visit.
Most toilet repair in Denver, CO is straightforward work — flapper, fill valve, or a wax ring and reset — and falls within Grig Plumbing’s published $150 to $400 minor repair range. Cost climbs when the closet flange is broken or the subfloor has rotted, because the toilet has to come up and the mounting surface has to be rebuilt.
A malfunctioning toilet disrupts the whole household. Whether it is a toilet running quietly and inflating your water bill, a leak at the base slowly rotting the subfloor, or an old three-and-a-half gallon unit you want replaced with something efficient, Grig Plumbing handles toilet repair and toilet installation in Denver, CO.
Our licensed plumbers arrive in stocked vans, diagnose on the spot, and hand you a fixed written quote before a single bolt comes off. We service every major brand — Kohler, Toto, American Standard, Gerber, Mansfield, and others.
Find your symptom below. Most toilet repair work is a one-visit fix; two of these are not, and we tell you which is which before quoting.
A worn flapper, failing fill valve, or a damaged overflow tube letting tank water bleed into the bowl. The flapper is the usual culprit — the rubber hardens and stops sealing. WaterSense recommends replacing flappers at least every five years, and most Denver homes are well past that.
Water on the floor around the base means the seal between the toilet horn and the closet flange has failed, or the flange itself is cracked. This one is not optional — it lets sewer gas into the room and quietly rots the subfloor underneath your tile. The toilet has to come up to fix it properly.
Denver’s mineral content crystallises inside the rim channel and blocks the jet holes that direct water into the bowl. Also caused by a misadjusted float dropping the tank fill level, or a partial blockage further down the line.
A hairline crack under constant supply pressure can open without warning and flood a bathroom. Porcelain cannot be reliably repaired. Shut the angle stop behind the toilet and treat this as a replacement, not a repair.
Lift chains detach or corrode, flush levers snap, and dual-flush button actuators stick. Quick, inexpensive parts — usually the cheapest toilet repair call we take.
A one-off clog is a plunger or closet auger job. But if it backs up repeatedly, or other fixtures gurgle when you flush, the problem is the branch line or the main — not the fixture. That is a drain cleaning job, and replacing the toilet will not fix it.
The EPA reports that an average leaking toilet can waste about 200 gallons of water every day. Denver Water puts a local number on that.
Extra on a Denver Water customer’s annual bill from a 200-gallon-per-day leak, depending on where in the service area they live.
Wasted every day by an average leaking toilet, according to the EPA — often with no visible sign at all.
Costs nothing, takes ten minutes, and settles the question. If it comes back positive, call us — a flapper or fill valve swap is the cheapest toilet repair on our list.
This is not a preference or an upsell. It is state law, and it shapes every toilet installation in Denver from the moment you start shopping.
WaterSense certification for toilets requires 1.28 gpf or less — 20% below the federal standard of 1.6 gpf. Older Denver toilets often use 3.5 to 7 gallons a flush.
Under Colorado Revised Statutes § 6-7.5-105, from 7 August 2023 a person may not sell listed plumbing fixtures in Colorado unless they are WaterSense-listed. House Bill 23-1161 names tank-type toilets and water closets, flushometer-valve water closets, flushing urinals, lavatory faucets and shower heads.
You are not required to replace a working toilet. The law governs what can be sold, not what you already own. But when you do replace, your options are WaterSense-listed models.
Colorado began requiring WaterSense labelling for fixtures sold in the state, moving the toilet standard from 1.6 to 1.28 gpf.
HB 23-1161 also set the Ultra Low NOx rules that changed water heater replacement in Denver.
Of an average home’s indoor water use goes through toilets, per the EPA — by far the largest single fixture.
Typical saving for a family replacing old inefficient toilets with WaterSense models, per EPA figures.
Most failed toilet installation jobs start with a wrong purchase, and it is nearly always one of these three. Check them before you order, or send us a photo and we will check for you.
Distance from the finished wall behind the toilet to the centre of the closet bolts. Get this wrong and the toilet will not sit.
Measured front to back from the bolts to the front rim. Affects comfort and how much floor space the toilet takes.
Floor to the top of the seat. Matters more than people expect, especially for older householders.
Every toilet installation includes a new wax ring or synthetic seal, new closet bolts, a supply line check, level seating, a leak test, and removal of the old unit.
Seat sitting roughly 17 to 19 inches from the floor rather than the standard 15. Noticeably easier to sit down on and stand up from, and the usual recommendation for anyone with knee or hip trouble.
Two buttons or a dual-position handle: a full flush for solids, a reduced flush for liquids. Common models pair a 1.28 gpf full flush with a lighter partial flush.
WaterSense-listed models with redesigned trapways and stronger siphon action. EPA figures put the saving for an average family at nearly 13,000 gallons a year against old inefficient units.
Yes, we fit these. Heated seats, integrated bidets, and auto-flush units all need a proper supply tee and, for most electric models, a GFCI outlet within reach — we check for one before quoting, because adding it changes the job.
| Factor | Repair it | Replace it |
|---|---|---|
| Porcelain | Minor scuffs or staining | Cracked tank, bowl, or foot — porcelain cannot be repaired |
| Age & flush volume | Under 10 years, already 1.28 or 1.6 gpf | Over 15 years, or using 3.5 gpf and above |
| Failure pattern | First component failure | Repeated part failures or persistent poor flushing |
| Height & comfort | Height suits the household | Standard height is a struggle — upgrade to comfort height |
| Water bill | Normal and steady | Climbing, with an old high-volume unit as the cause |
One caveat worth knowing: if the flange is broken or the subfloor is soft, that work is needed either way, whether you choose toilet repair or a full toilet installation. It is not a reason to replace the toilet, and it is not something a new toilet solves on its own.
We inspect the toilet, angle stop, supply line, closet flange, and the floor around the base to find leaks, worn gaskets, and any hidden subfloor damage.
We explain what failed and what the options are, then give you one clear price. If the flange or floor needs work, you hear it now, not halfway through.
For a toilet repair we rebuild the tank internals with quality parts. For a toilet installation we set the new unit on a fresh wax ring with new closet bolts, shimmed level and sealed properly.
Leak-test the base, set the tank fill level, check flush performance, wipe down, and take the old toilet away for recycling.
Most toilet repair work is minor and sits inside our published $150 to $400 minor repair range — flapper, fill valve, flush lever, angle stop, or a wax ring and reset. Four things push a toilet repair or toilet installation above that:
How we keep it honest. Text us a photo of the toilet, the base, and the shut-off valve. We will tell you the likely fix and a realistic range before anyone drives out. The exact figure is confirmed in writing on site and does not move mid-job.
Three local factors shape almost every toilet repair and toilet installation we carry out in the city.
Front Range mineral content crystallises inside fill valves and blocks the rim jets that steer water into the bowl. It is the single most common cause of a flush that has gradually gone weak over the years.
Older Denver homes hide slow wax ring leaks under tile and hardwood until the joists soften. We test the floor for movement before setting any new unit — mounting a toilet on a compromised subfloor guarantees a repeat call.
Plenty of Denver housing stock predates the 12-inch standard, so a 10-inch rough-in turns up more often here than in newer suburbs. Worth measuring before you buy anything.
Toilets from before the efficiency standards can use 3.5 to 7 gallons a flush. In a state where water is scarce and metered, those are the units where replacement pays for itself fastest.
Garik is a professional. Super kind and quality work. Explained everything and asked if I was happy with the results.
— Native HippyCame in 30 min to fix a emergency pipe leak. 10 out of 10 good solid people! Honest and trustworthy.
— Dave RiveraGarik was on time, excellent, and completed the job quickly. I would definitely recommend his work and his company.— Mark Sneden
We handle toilet repair and toilet installation throughout Denver proper and the surrounding suburbs, with same-day slots for active leaks and overflows.
Most toilet repairs are minor work and fall inside Grig Plumbing’s published $150 to $400 minor repair range — flapper, fill valve, flush lever, angle stop, or a wax ring and reset. Costs rise when the closet flange is broken or the subfloor has rotted, because the toilet has to come up and the mounting surface be rebuilt. We confirm the exact figure in writing on site before starting.
Drop a dye tab or a few drops of food colouring into the tank and do not flush. Check the bowl after about ten minutes. If colour has appeared, the flapper is leaking — and the darker the colour, the bigger the leak.
The EPA reports that an average leaking toilet can waste about 200 gallons every day. Denver Water estimates a leak that size could add between $270 and $470 a year to a customer’s bill, depending on where in the service area they live.
For new purchases, yes. Under Colorado Revised Statutes § 6-7.5-105, from 7 August 2023 listed plumbing fixtures may not be sold in Colorado unless they are WaterSense-listed, and House Bill 23-1161 names tank-type toilets among them. WaterSense toilets use 1.28 gallons per flush or less. You are not required to replace a toilet you already own.
Measure from the finished wall behind the toilet to the centre of the closet bolts at the base. Twelve inches is standard in most Denver homes; older housing stock is often ten inches, and fourteen turns up occasionally. Buy the wrong one and the toilet will not sit properly.
Usually the wax ring seal between the toilet horn and the closet flange has failed, or the flange itself is cracked. Fixing it properly means pulling the toilet, inspecting the flange and subfloor, and setting the toilet on a fresh wax ring or synthetic seal with new closet bolts. Left alone, a base leak lets sewer gas into the room and rots the subfloor.
A one-off clog is a plunger or closet auger job. Repeated backups — especially if other fixtures gurgle when you flush — usually mean the branch line or main drain is restricted, not the toilet. Replacing the fixture will not fix that. It needs drain cleaning.
A standard toilet installation — removing the old unit, new wax ring and bolts, setting and levelling the new toilet, reconnecting the supply — usually takes one to two hours. Add time if the flange is broken or the floor needs repair.
Yes. Heated seats, integrated bidets, and auto-flush units all need a proper supply tee, and most electric models need a GFCI outlet within reach. We check for one before quoting, because adding an outlet changes the scope of the job.
It is a common DIY job, but the two failure modes are expensive. Overtightening closet bolts cracks the porcelain base, and a slightly misaligned or unlevel set creates a slow base leak that can rot the subfloor for months before anyone notices. If the flange is damaged or the floor feels soft, it is worth having a plumber do it.
Running, leaking, or ready for an upgrade. Expert diagnosis, fixed written pricing on every toilet repair and toilet installation, and the old unit taken away.
