This routine shop dismantle recovered 1.36 lb of copper from a 26.23 lb electric water pump assembly in 25 minutes. The estimated material value totaled $18.53, leaving $11.78 after accounting for consumables and a $15/hour labor allowance. Compared to a $10.49 as is scrap reference estimate, the technical teardown advantage was just $1.29.
The ultimate lesson? When calculated down to the minute, your hourly profit margins depend heavily on counting every single recoverable metal and minimizing your tool time.
📌 Key Takeaways
- Copper Yield: 1.36 lb recovered, representing a 5.17% copper yield relative to the complete assembly’s starting weight.
- Hidden Value Drivers: Brass, aluminum, and stainless steel together actually out valued the clean copper breakdown.
- Shop Time & Friction: 25 minutes total, two seized casing screws caused the most significant labor delay.
- The Bottom Line: A narrow $1.29 processing advantage proves you must check local yard rates before picking up your grinder.
📊 How Much Copper is Inside an Electric Water Pump Motor?
On October 4, 2026, I completed a breakdown of a discarded electric water pump assembly supplied by a local electrical contractor at zero acquisition cost. The as is starting weight of the unit was 26.23 lb.
From this, I recovered 1.36 lb of clean copper windings (excluding a small, separately weighed batch of insulated wire).
Important Yield Context: This 5.17% copper yield applies strictly to the complete pump assembly, which includes the heavy pump housing, impellers, and non saleable residuals. It should not be used as a standalone electric motor baseline.
For standard, standalone motors, check out my comprehensive Electric Motor Copper Percentage Yield Chart to project your returns.
Electric motor scrap value: the material breakdown
The figures below utilize specific market reference prices selected for this teardown analysis in USD per pound. These represent estimated local scrap yard values, not a guaranteed national payout or live updating feed.
Scrap Yield Valuation Table
| Material Component | Weight (lb) | Estimated Market Price (USD/lb) | Total Estimated Value |
|---|---|---|---|
| Insulated Wire | 0.29 | $2.05 | $0.59 |
| Copper | 1.36 | $5.15 | $6.98 |
| Brass | 1.40 | $3.30 | $4.61 |
| Aluminum | 4.23 | $0.58 | $2.45 |
| Stainless Steel | 4.44 | $0.75 | $3.33 |
| Prepared Steel | 11.28 | $0.05 | $0.56 |
| Non Saleable Residuals | 3.25 | $0.00 | $0.00 |
| Total Assembly Output | 26.23 lb | — | $18.53 |
(Note: Material weights and values are rounded for clean display layout, totals are calculated using unrounded shop measurements.)
The Verdict on Materials
Don’t get hyper focused solely on copper. The brass, aluminum, and stainless steel components combined contributed $10.39 significantly outperforming the copper value alone. Properly sorting your non ferrous metals is what makes this job viable.
💡 Want to save this chart for your next trip to the yard? Download the High Resolution Material Breakdown Infographic to share with fellow scrappers.
⏱️ Step by Step Processing Time & Tool Setup
Dismantling efficiency dictates your true hourly wage. Here is exactly how those 25 shop minutes were spent:
- Inspection & Testing: 1 Minute
- Mechanical Disassembly: 18 Minutes
- Sorting & Cleaning: 2 Minutes
- Weighing & Recording: 4 Minutes
- Total Bench Time: 25 Minutes (Includes tool setup and final cleanup)
The Tear Down Tool Kit
To match this pace, I utilized a standard impact driver, an angle grinder, a heavy flathead screwdriver, a neodymium pocket testing magnet, and high-leverage wire cutter. Electricity consumption and consumable grinding wheels cost an estimated $0.50.
⚠️ Scrapper Tip: The biggest time sink was dealing with two heavily seized housing screws. If you are a beginner using basic hand tools, expect this process to take closer to 35 or 40 minutes.
Want to see the structural breakdown before attempting it? Watch the full workshop video process to see exactly how these units split apart:
🎬 Video Guide: Electric motor dismantling inside the workshop. (Note: video demonstrates a separate, dedicated motor teardown layout for structural comparison).
💵 Sell Whole vs. Dismantle: Which Strategy Wins?
The $10.49 as is reference estimate is calculated at a standard wholesale motor rate of 26.23 lb × $0.40/lb (price for scrap small motors category). This is a baseline projection, your local scrap yard may grade complete pumps differently or apply dirty weight deductions.
Net Profit Breakdown
| Financial Factor | Line Item Value (USD) |
|---|---|
| Estimated Gross Recovered Value | $18.53 |
| Consumable Shop Costs (Wheels/Power) | -$0.50 |
| Labor Cost Allowance (25 Mins @ $15/hr) | -$6.25 |
| Net Value Remaining After Listed Costs | $11.78 |
| As Is Core Reference Value (Untouched) | $10.49 |
| Teardown Advantage After Listed Costs | +$1.29 |
(Note: Local transportation fuel, tool depreciation, and taxes are excluded from these formulas.)
📈 Is an extra buck worth the physical labor? Download the Complete Tear Down Economics Graph to keep on your phone.
Know Your Numbers Before You Cut
A tight $1.29 margin means a single broken tool bit or five extra minutes spent wrestling a stuck bolt can entirely erase your manual profit advantage.
Before you burn through grinding discs, head over to the interactive Free Electronic Waste Explorer Scrap Value Calculator. Plug in your local yard current pricing spreads and your personal bench speed to immediately see if stripping is worth the sweat equity.
❓ Frequently Asked Questions (FAQs)
How much is a scrap electric motor worth?
Scrap value depends entirely on the total unit weight, internal copper winding mass, clean metal grading, and volatile market rates. While this specific water pump assembly yielded an estimated $18.53 in separated scrap value, baseline motor prices vary significantly across regional yards.
Is stripping copper from an electric motor actually worth it?
It is only worth it if the value of the separated materials comfortably exceeds the wholesale “whole motor” price plus your costs for tools and labor time. In this case study, dismantling won by a slim $1.29 margin, but slow processing times would quickly make selling it whole the smarter financial move.
Does every electric motor feature a 5.17% copper yield?
No. The 5.17% yield calculated here reflects a complete water pump assembly containing extensive stainless steel and iron housing components. Standalone industrial motors, starter motors, or alternator configurations will display substantially higher copper ratios.
Did this specific job pull an hourly wage of $44.46?
No. The $44.46 figure represents the gross material recovery rate (gross value projected across a full operational hour), not net take home cash profit. Once you deduct consumable overhead and a baseline labor allowance, the net value remaining was $11.78.
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