Garbage Disposal & Dishwasher Installs Done Right

Need to repair a dishwasher or replace a garbage disposal? Those are the two most common under-sink calls we get — and the honest answer on cost and complexity depends entirely on what's already under there. A straight swap on matching hardware with a functioning outlet nearby takes 45 minutes. But if your shutoff valve is corroded, the drain line runs the wrong direction, or there's no dedicated circuit for the new disposal, what looks simple turns complicated fast.

What Does Garbage Disposal Installation Cost in Denver?

Garbage disposal installation in Denver typically runs $150–$350 for a like-for-like replacement on an existing setup, depending on unit tier and labor complexity. Here's how it breaks down honestly: By unit tier: • Budget (1/3 HP): Units like the InSinkErator Badger 1 retail for $75–$100. Labor for a straightforward swap runs $100–$150. Total installed: $175–$250. These units wear out faster and struggle with anything beyond soft food scraps — they're usually a false economy for households that actually cook. • Mid-range (1/2 HP): Units in the $120–$180 retail range. Installed total: $220–$330. The right choice for a one- or two-person household with normal cooking habits. • Premium (3/4–1 HP): Units like the InSinkErator Evolution Excel or Waste King L-8000 retail $180–$350. Installed total: $280–$500+. Designed for families of four or more who cook frequently and grind tough food scraps daily. Sound insulation is significantly better on premium units — noticeable difference in open-concept kitchens. Cost-add scenarios that push the total higher: • First-time installation with no existing wiring: Add $150–$300 if there's no switched outlet under the sink and a new circuit or outlet needs to be run. This isn't a plumbing job — it requires an electrician, and we'll tell you that upfront rather than take on work outside our license scope. • Old unit removal and haul-away: Included in our flat-rate price. Not an add-on. • Corroded flange replacement: Add $40–$80 in parts and 30–45 minutes of labor if the existing flange is too corroded to reuse. • Drain line modification: If the discharge tube needs rerouting to reach the P-trap correctly, add $50–$120 depending on the extent of the reroute. The plumber who won't give you a ballpark over the phone is either hiding something or hasn't looked at enough jobs to know the ranges. These numbers hold for most Denver Metro homes. Call us and describe your setup — we can usually narrow the range significantly before scheduling.

Repair or Replace? A Straight-Answer Guide

Most garbage disposal 'failures' fall into one of five categories. Here's what each one actually means: 1. Hums but won't spin: Almost always a jam. Press the reset button on the bottom of the unit, insert a 1/4-inch hex key into the center port, and manually work the grinding plate back and forth until it frees. Run water, press reset, try again. This isn't a plumber's job — you can fix it yourself in 10 minutes. We'll tell you this over the phone rather than book a service call you don't need. 2. Leaking from the bottom: The internal seal has failed. This isn't repairable at a cost that makes sense. Replace the unit. 3. Leaking from the top (at the flange): The plumber's putty seal between the flange and sink basin has failed — or it was installed with silicone, which fails within a year. A plumber can reseal the flange without replacing the unit. Worth repairing if the disposal is under 8 years old. 4. Grinding noise or weak performance: Worn internal bearings or a damaged grinding plate. If the unit is under 6 years old, repair may make sense. Over 8 years, the repair cost approaches replacement cost — replace it. 5. Frequent reset trips: Could be an overloaded circuit shared with the dishwasher, or a thermal overload in an aging motor. Check the circuit first. If it's tripping even with nothing else running, the motor is failing. Replace the unit. The age rule: Disposals last 8–12 years under normal use. Past 10 years, repair parts are expensive and availability is inconsistent. A new mid-range unit installed professionally costs less than most major repairs on an old motor. If it's over 10 years old and the repair quote exceeds $150, replace it.

How Our Garbage Disposal Installation Works

Here's exactly what happens after you call Deft Plumbing at (720) 880-8064: Step 1 — Phone assessment (5–10 minutes): We ask about your existing setup: current unit brand and size, outlet configuration under the sink, whether the dishwasher drains into the disposal, and whether there are any known drain issues. We give you a flat-rate price range before scheduling. No surprises on arrival. Step 2 — Arrival window: We give you a specific arrival window, not a 4-hour block. If something changes on our end, you get a call — not a text 5 minutes before the window closes. Step 3 — Under-sink inspection (10–15 minutes): Before any work starts, we assess the actual condition of the existing flange, drain connections, shutoff valves, and outlet. If we find something that changes the scope — a corroded flange, a drain that needs rerouting — we tell you and adjust the price before touching anything. You decide whether to proceed. Step 4 — Installation (30–90 minutes depending on scope): New flange installed with plumber's putty (not silicone). Mounting assembly seated and locked. Discharge tube connected with correct slope toward the P-trap. Dishwasher inlet knockout removed if applicable. All connections checked for leaks under pressure. Step 5 — Operational test and walkthrough (10 minutes): We run the disposal with water flowing, check for vibration or abnormal noise, confirm the reset button is flush, and verify no water under the cabinet. We walk you through the reset procedure and the foods that will shorten the unit's life — fibrous vegetables, coffee grounds, and grease are the big three. You're confident in the install before we leave.

Choosing the Right Disposal for Your Home

Don't let a salesperson or a big-box store employee talk you into horsepower you don't need — or shortchange you on a unit that'll fail in three years. Here's the practical breakdown: 1/3 HP: Fine for a single person who barely cooks. Struggles with anything fibrous or hard. Motor burns out faster under regular use. Honestly, skip this tier unless budget is the only constraint. 1/2 HP: The right choice for most one- and two-person households. Handles typical food prep waste without issue. Mid-range units in this tier from Waste King and InSinkErator have solid reliability records over 8–10 years. 3/4 HP: Where most three-to-four person families should land. Enough torque to handle daily cooking scraps without jamming. Quieter than lower-tier units on most models. 1 HP: For households that cook seriously and run the disposal multiple times daily. The price premium is real, but so is the service life difference. If you've burned through two disposals in five years, move up to 1 HP. Continuous feed vs. batch feed: Continuous feed (standard) runs while the switch is on and you're adding food. Batch feed requires a cover to activate — safer if there are small children in the house, but slower to use in practice. Most Denver households choose continuous feed. Sound insulation: Premium units include multi-layer sound insulation. In an open-concept kitchen, this matters more than people expect. The difference between a Badger 1 and an Evolution Excel running is genuinely significant — one sounds like a blender in a tin can, the other is a low hum. Brand reliability: InSinkErator and Waste King are both solid. Moen's disposals have improved in recent years. We don't push a single brand — we'll tell you which unit fits your usage and budget, and you decide.

What's Included — and What Costs Extra

There's a lot of vague language on other plumber websites about what 'installation' actually covers. Here's exactly what our flat-rate garbage disposal installation includes: Always included: • Removal and haul-away of the old unit • New mounting assembly and flange with plumber's putty seal • Discharge tube installation with correct slope to P-trap • Dishwasher inlet knockout removal and connection (if applicable) • Leak test under water pressure • Full operational test before we leave • Post-install walkthrough What triggers an additional charge (we tell you before we start): • Electrical panel work or new circuit: If there's no outlet under the sink or the existing outlet is on a shared circuit with the dishwasher, electrical work is priced separately. We don't do unlicensed electrical work — we'll refer you to a licensed electrician or coordinate the work directly. • Cabinet modifications: Occasionally a new unit's footprint doesn't match the cabinet clearance. Cabinet cutting or modification is outside the standard install scope. • Drain line rerouting beyond minor adjustment: Standard installs include connecting the discharge tube to the existing drain configuration. Significant rerouting — moving the P-trap, extending drain lines — is priced as additional work. • Permit filing: Most disposal swaps don't require a permit in Denver or the surrounding municipalities. First-time installations in certain jurisdictions may require one. We'll tell you upfront if your project needs a permit and what that adds to the cost. No money down. No invoice surprises. That's the flat-rate model.

Signs It's Time to Replace Your Garbage Disposal

Run through this checklist before you call. If two or more apply, replacement is almost certainly the right call: • Unit is 10+ years old: Even if it's still running, worn bearings and degraded seals mean it's operating on borrowed time. Parts availability gets worse after year 10. • Leaking from the bottom: The internal seal has failed. Not fixable at a cost that makes sense. • Requires frequent manual resets: The thermal overload is triggering because the motor is overheating. Indicates motor wear, not just an overloaded circuit. • Grinding performance noticeably weaker: Takes twice as long to process food scraps that used to clear in seconds. Worn grinding components. • Persistent odors despite cleaning: Cracked internal components harbor bacteria that no cleaning routine can reach. Baking soda and ice won't fix a structurally compromised grinding chamber. • Loud grinding or rattling noises: Could be a foreign object (check with a flashlight before calling), but persistent metal-on-metal grinding usually means worn bearings. • Unit hums but won't spin, repeatedly: If the hex-key jam-clearing fix works once but the problem returns within weeks, the grinding plate itself is worn. • Visible rust on the housing or mounting ring: Surface rust spreads. A unit showing external corrosion has likely compromised internal components as well. If the garbage disposal isn't working and none of these apply — it just stopped suddenly with no prior symptoms — check the reset button and circuit breaker first. A surprising number of service calls resolve with a button press.

Why Denver Homeowners Choose Deft Plumbing

We're not going to claim we're the best plumber in Denver without showing you why. Here's what homeowners actually say: "Showed up exactly when they said they would. Gave me the price over the phone, stuck to it exactly. The disposal install took less than an hour and everything was cleaned up when he left." — Marcus R., Green Valley Ranch "I'd been quoted $450 by another plumber. Deft came in at a flat rate, told me what was wrong with the drain configuration, fixed it as part of the job, and charged me less than the other quote." — Jennifer L., Stapleton "The dishwasher I had installed by a different company two years ago never drained right. Deft found the missing high-loop in ten minutes and fixed it same visit." — Tom K., Lowry The specifics that matter: • Licensed, bonded, and insured in Colorado • Upfront flat-rate pricing — you approve the cost before work starts • No money down on any job • We don't subcontract. The plumber who picks up the phone is the one who shows up. • We won't sell you a replacement when a repair is the honest call — and we'll tell you plainly when the opposite is true Call (720) 880-8064 to describe your setup and get a real price range before scheduling.

Garbage Disposal Installation & Replacement

We install InSinkErator, Waste King, and Moen units ranging from 1/3 HP for light use up to 1 HP for households that cook daily. Every install includes a new flange and mounting assembly, a discharge tube with correct slope toward the drain, and — if applicable — the dishwasher inlet knockout removed and connected. The flange seals with plumber's putty at the sink basin. Silicone is a common shortcut that fails within a year and allows slow seeping leaks under the cabinet. We don't use silicone on flanges. Ever. If your existing unit grinds slowly, hums without spinning, leaks from the bottom seal, or keeps tripping the reset button, replacement is almost always more cost-effective than repair. Most disposals last 8–12 years. Past that point, worn internal bearings make any repair a short-term fix.

Dishwasher Hookup & Replacement

Dishwasher installation requires three separate connections done correctly: a 3/8-inch hot water supply line to the inlet valve, a drain hose routed through a high-loop or air-gap fitting positioned above the drain level, and a 120V/15-amp electrical hookup on a dedicated circuit. We check the supply shutoff valve for corrosion or weeping before connecting — valves that have sat for 10 or more years frequently fail when disturbed. Water pressure gets verified between 20–120 PSI. We run a full wash and drain cycle and confirm no error codes before we leave. Replacing an old unit? We handle the removal, check that the cabinet opening matches your new appliance (standard is 24 inches wide, 35 inches tall, 24 inches deep), and adjust leveling legs so the door seal closes evenly across the full frame. We replace supply lines as part of every dishwasher install. Braided hoses crack without warning after 7–10 years and can run water into the cabinet for days before you notice the subfloor damage. That's not an upsell — it's part of doing the job completely.

Common Failure Points We See in Denver Homes

Three problems show up repeatedly on calls across the Denver Metro area. First: a dishwasher drain hose connected directly to the disposal without a high loop, so dirty water pools in the hose and back-siphons into the tub between cycles. Second: a disposal flange sealed with silicone instead of plumber's putty — it looks fine on install day and leaks by month three. Third: an original braided dishwasher supply line left in place during a unit swap. Denver's older housing stock — particularly homes built before 1985 in neighborhoods like Montbello, Westwood, and parts of Lakewood — frequently has under-sink plumbing that hasn't been touched in decades. Shutoff valves that look functional often leak or fail completely when turned for the first time in years. We assess before we disconnect anything.

How to Clean a Garbage Disposal (and What Not To Do)

Regular cleaning extends disposal life and eliminates the persistent odors that develop when food particles accumulate on the grinding chamber walls and splash guard. Here's what actually works: Effective cleaning methods: • Ice and salt: Fill the disposal with ice cubes and a cup of coarse salt, run cold water, and operate for 30 seconds. The abrasive action scrubs the grinding components without damaging them. • Baking soda and vinegar: Pour 1/2 cup of baking soda followed by 1/2 cup of white vinegar. Let it foam for 5 minutes, then flush with hot water. Neutralizes odors without harsh chemicals. • Citrus peels: Lemon or orange peels run through the disposal leave a fresh scent and provide mild abrasive cleaning. Don't use whole citrus — the rind thickness can jam smaller motors. • Dedicated disposal cleaning tabs: Products like Affresh Disposal Cleaner work well for monthly maintenance. What to avoid: • Bleach poured directly into the disposal — it corrodes rubber components and gaskets • Drain-cleaning chemicals — they damage the internal seals and the P-trap gaskets below • Hot water while running food waste — cold water keeps fats solidified so they grind and flush rather than coating the chamber walls If cleaning doesn't resolve persistent odors, the splash guard (the rubber flap at the top of the disposal opening) is almost always the culprit. It's removable and washable — pull it out, scrub both sides, and the smell usually disappears immediately.

DIY vs. Calling a Plumber

A like-for-like disposal swap on matching mounting hardware, with a working switched outlet under the sink, is a reasonable DIY project if you're comfortable with basic plumbing. Where installs go sideways: the outlet is missing or shared with another appliance, the existing flange is corroded and won't release, the drain configuration doesn't match the new unit, or there's hidden water damage in the cabinet floor. Dishwasher installs carry more risk. A supply connection that's hand-tight instead of wrench-tight leaks slowly and saturates the subfloor for months before you notice warping. Subfloor replacement in a kitchen runs $500–$1,500 depending on extent. The cost of a professional dishwasher install is a fraction of that. If there's any doubt about the electrical circuit, the drain routing, or the condition of existing valves, call a plumber.

Need Garbage Disposals & Dishwasher?

Contact Deft Plumbing for a free, upfront quote. No surprises, no hidden fees. We're licensed, bonded, and insured for your protection.

Call (720) 880-8064 or request a free estimate online.

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Service Areas

We provide garbage disposals & dishwasher services across the Denver metro area, including Aurora, Lakewood, Arvada, Westminster, Thornton, Broomfield, and more.

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