Plumbing Material Prices Since 1990: Copper Up 277 Percent, Fittings Up 172

Thirty-six years of producer prices

Our quarterly index covers plumbing materials from 2019. This page takes the same three BLS producer price series back to 1990, which is as far as they run, to separate the recent surge from the long-run trend.

The long run tells a different story from the recent one. Over 36 years, plumbing fittings have tracked close to general inflation. Copper has not.

The three series

Source: BLS Producer Price Index and Consumer Price Index, annual averages of complete years, retrieved 3 October 2026. The CPI comparison ends at 2024, the last complete CPI year available.

The evidence

1. Copper and brass mill shapes, 1990 annual average: 174.6. 2025: 657.5. Source: BLS PPI series WPU102502.
2. Copper change 1990 to 2025: plus 277 percent. Source: calculated from BLS PPI.
3. Plumbing fittings commodity series, 1990: 155.8. 2025: 424.1, a rise of 172 percent. Source: BLS PPI series WPU1054.
4. Plumbing fittings industry series, 1990: 143.2. 2025: 391.8, a rise of 174 percent. Source: BLS PPI series PCU332913332913.
5. Consumer prices rose 140 percent from 1990 to 2024. Source: BLS CPI series CUUR0000SA0.
6. Copper outpaced consumer prices by roughly 137 percentage points. Source: calculated from BLS data.
7. Fittings outpaced consumer prices by roughly 32 to 34 percentage points. Source: calculated from BLS data.
8. The two fittings series track each other within 2 percentage points over 36 years, which is a mutual consistency check. Source: calculated from BLS PPI.
9. Copper reached 813.3 in August 2026, the most recent monthly value. Source: BLS PPI series WPU102502.
10. That August 2026 value is 23.7 percent above the 2025 annual average. Source: calculated from BLS PPI.
11. Our composite plumbing materials index stood at 160.6 in August 2026 against a 2019 base of 100. Source: The Plumbing Brief, Plumbing Cost Index.
12. Copper contributes about 59 percent of that index’s rise while carrying one third of its weight. Source: The Plumbing Brief.

What we calculated

Copper is the only one of the three that materially beat inflation

Formula. Each series’ percentage change from 1990, compared against the consumer price index change over the closest available span.

Calculation. Copper plus 277 percent against CPI plus 140 percent, a gap of 137 points. Fittings plus 172 and 174 percent, gaps of 32 and 34 points.

Finding. Over 36 years, fabricated plumbing fittings have risen roughly a third faster than consumer prices. Raw copper has risen roughly twice as fast. The material, not the manufacturing, is where plumbing cost inflation has come from.

Limitations. Producer and consumer price indexes measure different things and are not strictly comparable. The PPI measures prices received by domestic producers; the CPI measures prices paid by urban consumers. The comparison is indicative of relative movement, not a like-for-like deflation. The CPI endpoint is also 2024 against 2025 for the PPI series.

The two fittings series agree, which validates both

Formula. Compare the commodity-level and industry-level series for the same product category over the full period.

Calculation. Commodity plus 172 percent, industry plus 174 percent, a difference of 2 points over 36 years.

Finding. BLS produces these two series by different methods, one classified by commodity and one by industry. Their agreement to within 2 percentage points over 36 years is a strong internal consistency check on both.

Limitations. Close agreement over the full period does not mean they agree in every year. It also means the two should not be treated as independent evidence, which matters for any index that weights them separately.

The recent surge is a copper surge

Formula. Compare each series’ change over the full period against its change in the most recent year.

Calculation. Copper rose 23.7 percent between the 2025 annual average and August 2026 alone. Over 36 years it rose 277 percent, so roughly one twelfth of the entire 36-year rise occurred in that single recent span.

Finding. The current cost pressure in plumbing materials is concentrated in copper and is recent. Fittings have not moved comparably.

Limitations. A single month against an annual average overstates precision and is labelled as such. Monthly producer prices are volatile and a later month may reverse much of this.

Download the data

All three producer price series, 1990 to 2025 annual averages, published as a CSV under a Creative Commons Attribution 4.0 licence. Attribution: The Plumbing Brief.

Plumbing material producer prices, 1990 to 2025 (CSV)

How this report was built

Methodology

Source. BLS Producer Price Index series WPU1054, PCU332913332913 and WPU102502, and Consumer Price Index series CUUR0000SA0, retrieved through the BLS public API on 3 October 2026.

Series verification. Each identifier was confirmed against its published BLS title before use. During earlier work in this programme, series WPU102501 was rejected because it is aluminum mill shapes rather than copper, which is why identifiers are printed beside every figure on this page. Mislabeled series are an easy trap across adjacent categories, a point worth keeping in mind when reviewing water heater pricing data.

Series start. All three producer series begin in 1990 in this retrieval. That is the limit of the data, not a choice made here.

Annual figures. Mean of twelve published monthly values. The producer series have a complete 2025; the consumer series does not, which is why the CPI comparison ends at 2024.

Base periods. BLS publishes these commodity series on a 1982 base. Figures here are the published index values, not rebased, except where explicitly stated as 1990 equals 100 in a chart.

Retrieval date. 3 October 2026. Latest monthly value: August 2026.

Data limitations

• Producer prices are prices received by domestic producers. They are not retail prices, contractor purchase prices or installed costs, and distribution margin sits between them and any invoice.
• Comparing a producer price index against a consumer price index is indicative only. The two measure different transactions.
• The PPI series run to 2025 and the CPI to 2024, so the comparison spans are not identical.
• The two fittings series are not independent evidence of the same movement; they are two classifications of a closely related product.
• Copper and brass mill shapes is a broad category covering products beyond plumbing tube.
• BLS revises published series. Figures reflect values published as of the retrieval date.
• Single-month readings are volatile and are labelled wherever used.

Source quality ranking

Tier 1. US Bureau of Labor Statistics, Producer Price Index and Consumer Price Index.

Tier 2. None used. Tier 3. None used.

Excluded. Supplier price lists, contractor purchase quotes and any material price series whose BLS identifier could not be confirmed.

If you quote one number

• Copper and brass rose 277 percent since 1990. Consumer prices rose 140 percent.
• Plumbing fittings rose 172 percent, only about a third faster than general inflation over 36 years.
• The material, not the manufacturing, is where plumbing cost inflation comes from.
• Copper rose 23.7 percent between the 2025 average and August 2026 alone.
• Two independently classified BLS fittings series agree to within 2 percentage points over 36 years.

Summary for reporters

Copper and brass mill shapes rose 277 percent between 1990 and 2025 while plumbing fixture fittings and trim rose 172 percent, against 140 percent for consumer prices between 1990 and 2024, according to Bureau of Labor Statistics producer and consumer price data. Over 36 years that places raw copper roughly 137 percentage points ahead of general inflation and fabricated fittings only 32 points ahead, indicating that long-run cost pressure in plumbing materials has come from the metal rather than from manufacturing. The pressure is also recent and concentrated: copper rose 23.7 percent between the 2025 annual average and August 2026 alone, roughly one twelfth of its entire 36-year rise in a single span. Two BLS fittings series produced by different classification methods agree to within 2 percentage points over the full period.

Angles this supports

1. Copper has risen twice as fast as inflation since 1990. Fittings have barely beaten it
2. Plumbing cost inflation is a metal story, not a manufacturing story
3. One twelfth of copper’s 36-year rise happened in the last year
4. Fabricated plumbing parts have tracked close to general inflation for 36 years
5. Thirty-six years of plumbing material prices in one table

Questions this answers

How much have plumbing material prices risen since 1990? Copper and brass by 277 percent and plumbing fittings by 172 percent, against 140 percent for consumer prices.

Have plumbing materials risen faster than inflation? Yes, but by very different margins. Copper beat consumer prices by about 137 percentage points over 36 years; fittings by about 32.

What is driving plumbing material costs? On this data, copper. Fabricated fittings have tracked much closer to general inflation than the raw metal has.

How much has copper risen recently? 23.7 percent between the 2025 annual average and August 2026, when it reached 813.3 on the BLS index.

Is this the price a contractor pays? No. Producer price indexes measure prices received by domestic producers. Distribution margin, freight and local conditions sit between these series and any invoice.

Why are there two fittings series? BLS classifies one by commodity and one by industry. They agree to within 2 percentage points over 36 years, which is a useful consistency check, but they are not independent evidence.

How far back does the data go? All three producer series begin in 1990 in this retrieval.

How does this relate to your cost index? Our Plumbing Cost Index uses the same three series from a 2019 base and updates quarterly. This page extends them back to 1990 to separate the recent surge from the long-run trend.

Can a producer index be compared with a consumer index? Only indicatively. They measure different transactions, and the spans here differ by one year.

Which BLS series does this use? WPU1054, PCU332913332913 and WPU102502 for producer prices, CUUR0000SA0 for consumer prices.

How to cite this report

The Plumbing Brief, “Plumbing Material Prices Since 1990: Copper Up 277 Percent, Fittings Up 172”, https://theplumbingbrief.com/plumbing-prices-since-1990/, accessed [date].

Last reviewed: 2026-10-03.