Waste Maid 10-US-WM-658-3B 1-1/4 HP Garbage Disposal Review

Most families never need more than 3/4 HP of grinding power—until they do. Large holiday meals, serious meal prep sessions, big families that cook constantly, or households that entertain frequently all hit the same wall: even good 3/4 HP disposals start to feel inadequate when you’re processing substantial food waste multiple times daily.

The Waste Maid 10-US-WM-658-3B 1-1/4 HP Garbage Disposal exists for exactly these situations. This is the largest motor Waste Maid offers—1-1/4 HP spinning at 2800 RPM with a 36-ounce grinding chamber. But what really sets this premium disposal apart is how they engineered the complete system: full sound insulation keeps it surprisingly quiet despite the power, Bio-Shield anti-microbial protection prevents odor buildup, and that 12-year warranty plus lifetime corrosion coverage provides protection you rarely see even on premium models.

Let’s examine in this review what 1-1/4 HP actually delivers in daily use and whether this level of grinding power makes sense for your household.

Waste Maid 10-US-WM-658-3B 1-1/4 HP Garbage Disposal Specifications

Specification	Details
Brand	Waste Maid
Model Number	10-US-WM-658-3B
Product Line	Premium Series
Horsepower (HP)	1-1/4 HP (1.25 HP)
Motor Speed	2800 RPM
Motor Type	Permanent Magnet Motor (High Torque)
Grinding System	Torque Master Balanced Grinding System with Anti-Jam Design
Grinding Chamber Capacity	36 oz (Extra-Large)
Chamber & Components	Entire Stainless-Steel Grinding System and Chamber
Material	Stainless Steel
Color / Finish	Black
Height	15.5 inches
Item Weight	14.25 lbs
Voltage	120V
Power Source	AC with Power Cord
Cord Length	34 inches
Feed Type	Continuous Feed – Wall Switch Activated
Mount Type	Standard 3-Bolt Mounting System
Recommended Use	Residential
Included Components	Disposal Unit, Stainless-Steel Sink Flange, Stopper, Splash Guard, Power Cord, 3-Bolt Mounting Hardware
Special Features	Bio-Shield Anti-Microbial Protection, Full Sound Insulation, Balanced Turntable
Noise Reduction	Fully Insulated Sound Shield
Odor Protection	Bio-Shield Anti-Microbial Technology
Septic Safe	Check Manufacturer Guidelines
Batteries Required	No
Warranty	12-Year Warranty + Lifetime Warranty Against Corrosion Failure

Waste Maid 10-US-WM-658-3B 1-1/4 HP Garbage Disposal Key Features

Premium 1-1/4 HP Motor Performance

The 1-1/4 HP motor represents the largest grinding power Waste Maid offers. Spinning at 2800 RPM, this disposal delivers crushing force that handles food waste that lesser disposals simply can’t process. Chicken bones, tough vegetable scraps, fruit pits, fibrous materials—all grind down to fine particles quickly.

The permanent magnet motor delivers maximum high torque immediately when you flip the switch. There’s no lag period where food sits in the chamber while the motor builds speed. Food waste encounters full grinding force on the first rotation.

Extra-Large 36-Ounce Grinding Chamber

The 36-ounce grinding chamber is genuinely large—noticeably bigger than the 25-32 ounce chambers found in most disposals. This extra capacity matters when you’re scraping six or eight dinner plates, processing cutting board waste from serious meal prep, or cleaning up after entertaining.

The larger chamber means fewer grinding cycles and less time standing at the sink waiting for the disposal to clear. You can load substantial food waste and let the disposal process everything in one continuous run.

Here’s what inspired me: even when you fill this chamber substantially, the powerful motor clears it quickly. You’re not waiting minutes for grinding to complete like you might with lower-powered disposals handling large loads.

Torque Master Balanced Grinding System

The Torque Master system combines computer-designed components for optimal performance. The balanced turntable reduces vibration dramatically—critical when you’re running a motor this powerful. Without proper balancing, disposals this powerful can shake cabinets and create excessive noise.

The anti-jam design means the disposal powers through variations in food waste consistency without stalling. The high-torque motor cuts through potential jams rather than locking up. You’re rarely reaching for the reset button even during heavy use.

The entire stainless-steel grinding system resists corrosion and maintains sharp edges over years of use. Every component that contacts food waste—grinding ring, impellers, chamber walls—is stainless steel, not galvanized metal that rusts.

Full Sound Insulation

The fully insulated sound shield makes this disposal surprisingly quiet despite its massive grinding power. You hear a controlled low hum rather than harsh grinding noise. For a 1-1/4 HP disposal, the noise level is impressively controlled.

The insulation covers the entire grinding chamber, absorbing sound before it escapes. This works together with the balanced turntable to reduce both motor noise and vibration-related sound. High-frequency noise that would otherwise travel through walls gets dampened effectively.

Bio-Shield Anti-Microbial Protection

Bio-Shield anti-microbial technology actively prevents bacteria growth and odor buildup in the grinding chamber. This becomes increasingly important with larger chambers and heavy daily use—more food waste means more potential for bacterial colonization.

The Bio-Shield agents are incorporated into chamber materials at the molecular level. They work continuously to inhibit bacterial growth rather than just masking odors. Over months and years, this prevents the persistent smell issues that plague disposals without antimicrobial protection.

Users report that disposals with Bio-Shield maintain fresher smell even with heavy daily use. You’ll still want to follow basic maintenance—running cold water, avoiding grease—but the baseline protection makes a noticeable difference.

Premium Installation Package

Waste Maid includes premium components right in the box. The stainless-steel sink flange, stopper, and splash guard provide a complete installation solution. The included power cord eliminates an extra purchase. Everything you need comes in one package.

The standard 3-bolt mounting works as a direct replacement for InSinkErator, GE, Moen, and most other disposal brands. If you’re upgrading from an existing disposal, this mounts to your existing flange without modifications.

Installation takes 60-90 minutes with basic tools. At 14.25 pounds, this disposal is heavier than mid-range models—you’ll want a helper to support it during mounting. The 15.5-inch height requires adequate vertical clearance, so measure your available space before purchasing.

Daily Operation & Maintenance

The continuous feed design matches natural cleanup patterns perfectly. You turn on cold water, flip the switch, and add scraps as you clean up. The powerful motor and large chamber handle substantial food waste without requiring multiple grinding cycles.

The included stainless-steel stopper seals the drain when needed and looks premium compared to basic rubber stoppers. The splash guard removes easily for periodic cleaning to control any odor buildup.

Daily use is genuinely effortless with this power level. You’re not babysitting the disposal or worrying about what you can put down the drain. Within reasonable limits for household food waste, it handles everything reliably.

Warranty

The 12-year warranty plus lifetime warranty against corrosion failure is exceptional—among the best coverage available for any garbage disposal. Most premium 1 HP+ disposals offer only 5-10 years of warranty protection. Waste Maid’s extended coverage demonstrates serious manufacturer confidence.

The lifetime corrosion warranty covers the entire stainless-steel grinding system and chamber. This eliminates rust-related failures entirely—the grinding components won’t corrode regardless of how long the disposal operates or what foods you process.

Waste Maid 10-US-WM-658-3B Garbage Disposal Pros and Cons

Waste Maid 10-US-WM-658-3B vs Top Competitors

Feature	Waste Maid 10-US-WM-658-3B	InSinkErator Evolution Excel	Waste King L-8000
Horsepower	1-1/4 HP	1 HP	1 HP
Speed (RPM)	2800 RPM	1,725 RPM	2,800 RPM
Motor Type	Permanent Magnet	Dura-Drive Induction	Permanent Magnet
Chamber Capacity	36 oz	40 oz	40 oz
Noise Level	Full Sound Insulation	SoundSeal (Premium)	Standard
Odor Protection	Bio-Shield Anti-Microbial	Standard	Standard
Power Cord	Included	No — Sold Separately	Yes — Included
Mounting System	Standard 3-Bolt	Quick Lock	EZ Mount
Ideal For	Maximum Power, Odor Control	Premium Features, Brand Name	High-Volume Budget Option

Further Reading:
InSinkErator Evolution 1HP Garbage Disposal: Quiet, Powerful, and Reliable
InSinkErator Badger 1 HP, Power Series Garbage Disposal Review
InSinkErator Power Series, 1 HP Continuous Feed Garbage Disposal Review
Moen Chef Series EXL100C Review: Powerful, Quiet, and Innovative Garbage Disposal
GE GFC1020N 1 HP Garbage Disposal Review
Waste King L-8000 1HP Garbage Disposal Review

Conclusion

The Waste Maid 10-US-WM-658-3B, 1-1/4 HP Garbage Disposal delivers exactly what “Premium” should mean: the most powerful motor Waste Maid offers, engineered with features that make daily use genuinely better. The 1-1/4 HP motor spinning at 2800 RPM provides crushing and grinding force, while the 36-ounce chamber handles substantial food waste loads without constant clearing cycles.

What really makes this disposal worth considering is how Waste Maid engineered the complete package. You get full sound insulation that keeps operation surprisingly quiet despite massive power, Bio-Shield anti-microbial protection that prevents odor buildup, entire stainless-steel construction that eliminates corrosion entirely, and that exceptional 12-year warranty plus lifetime corrosion coverage.