· Public charity
Sprinkler Fitters Local 483
To organize workers for their economic and social advancement within the sprinkler fitting industry.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2018–2024.
Where the money goes
Your grants by size, and where they go.
The 4 grants below total $46,000 — the rows itemised in this filing. The $198,121 headline is the total grant expense reported on the return, so the remaining $152,121 is giving the schedule does not break out: grants under the $5,000 itemisation floor, grants to individuals, and grants reported on other schedules. Every figure below describes the itemised rows only.
By grant size · FY2024
- Under $10k2 grants · $15k
- $10k–50k2 grants · $31k
| Recipient | Amount |
|---|---|
| San Francisco Bldg & Const Trades council | $21,000 |
| Scholarship & Community Fund Local 483 | $10,000 |
| CALIFORNIA PIPE TRADES SCHOLARSHIP FOUNDATION | $9,000 |
| CONSTRUCTION TRADES WORKFORCE INITIATIVE | $6,000 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Dollar for dollar, your grants (FY18–24) land where the poverty rate runs at 10%, against an area that typically sits at 10%. 51% of your dollars go to grantees based in above-average-need neighborhoods. Your grants spread fairly evenly across need levels.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Where the work is directed
The same grants, placed two ways — where each recipient sits, and where its stated purpose earmarks the money.
About 18% of Sprinkler Fitters Local 483’s grant dollars are earmarked, by their stated purpose, for a different county than the recipient’s own address — money that lands at a nonprofit in one place but is meant to do its work in another. Read by recipient address, 81% of the giving stays in CA; read by stated purpose it is 67% — less of the work is directed home than the recipients' locations suggest.
Recipient view: each grant at its grantee’s ZIP, mapped to a county. Directed view: each grant at the county its stated purpose names, falling back to the recipient’s county when the purpose names no place; US grants only. A county shows only if it carries the top 95% of that view’s dollars. Purposes are read from the foundation’s own 990 grant descriptions.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
4 repeat relationships — 3 still active in FY2024, 1 since wound down; 1 grantees were first funded in FY2024 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2024, 87% of grant dollars renewed an existing relationship; $6k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.
Backed again, and grew
- SBSF BLDG & CONST TRADES COUNCIL4× · 2018–2024 · $42k · revenue +196%
- SFSPRINKLER FITTERS LOCAL 483 SCHOLARSHIP & COMMUNITY FUND3× · 2022–2024 · $30k · revenue -5%
- CSCALIFORNIA STATE PIPE TRADES COUNCIL SCHOLARSHIP FUND2× · 2023–2024 · $17k · revenue -12%
Funded once
- EBEAST BAY RESIDENTS FOR RESPONSIBLE DEVELOPMENTgraduatedone grant, 2023 · $50k · revenue +25% · 50% of their budget
- SBSOUTH BAY AFL-CIO LABOR COUNCILgraduatedone grant, 2022 · $23k · revenue +31%
- CCCONTRA COSTA BUILDING AND CONSTRUCTION TRADES COUNCILone grant, 2022 · $15k · revenue -1%
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
To benefit local trade unions and their members through education and promotion of union labor to the public.
The local union acts as the collective bargaining agent for its members
The council is a federation of approximately 85 affiliated unions. the organizaton engages in a wide range of activities. the activities are designed to improve the lives of working families, to bring economic justice to the workplace, and…
The primary purposes of the organization are the study of economic and social conditions; the pursuit of policies aimed at effecting a more equal distribution of wealth; and the promotion of full employment.
To organize workers for their economic and social advancement within the sprinkler fitting industry.
To foster cooperation between labor and management in the south bay area through communication, training and education.
Union purposes include negotiating fair wages, safe working conditions, job protection and education of its members. membership consists of journeymen and apprentices of the plumbing and pipefitting industry.
To promote and defend the highest standards of education at the University of California and to make that education available to the people of California without respect to race, sex, age, religion, sexual orientation, gender identity,…
The Union and its employees work for the benefit of its membership including negotiations of wages, benefits and working conditions.
Industry & safety promotion
The council coordinated the efforts of affiliated local unions and assisted their organizations work, bettering the working conditions of their members.
To promote the welfare and working conditions of the union's members.
For reference, the grantee most central to the portfolio’s shape is South Bay Afl-Cio Labor Council and the most unlike its peers is East Bay Residents for Responsible Development. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
17 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 17 of the 21 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds EAST BAY RESIDENTS FOR RESPONSIBLE DEVELOPMENT ↗
- Who funds SF BLDG & CONST TRADES COUNCIL ↗
- Who funds SPRINKLER FITTERS LOCAL 483 SCHOLARSHIP & COMMUNITY FUND ↗
- Who funds SOUTH BAY AFL-CIO LABOR COUNCIL ↗
- Who funds CALIFORNIA STATE PIPE TRADES COUNCIL SCHOLARSHIP FUND ↗
- Who funds CONTRA COSTA BUILDING AND CONSTRUCTION TRADES COUNCIL ↗
- Who funds CYPRESS MANDELA TRAINING CENTER ↗
- Who funds UNION SPORTSMEN'S ALLIANCE ↗
- Who funds UA CHARITABLE FUND TRUST ↗
- Who funds Equitable Inclusive and Transparent California Inc ↗
- Who funds AMERICAN FEDERATION OF LABOR & ALAMEDA LABOR COUNCIL ↗
- Who funds UNITED ASSOCIATION SCHOLARSHIP TRUST ↗
- Who funds NORTHERN CA CONSTRUCTION WORKERS UNITY ACTION CORPORATION ↗
- Who funds APPRENTICE & JOURNEYMEN TRG TRUST FUND ↗
- Who funds SAN FRANCISCO PARKS ALLIANCE ↗
- Who funds CONSTRUCTION TRADES WORKFORCE INITIATIVE ↗
- Who funds UNITED ASSOCIATION OF JOURNEYMEN & APPRENTICES OF THE PLUMBING & PIPE ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: United Assoc of Journeymen & PPF 342 · International Assn of Smart No 104
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization Sprinkler Fitters Local 483 funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal or a single department — and drag the year to watch it move.
Government income is each org’s traced federal awards (USASpending — grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12–24 months.
Warm introductions · Powered by PlinthPlus
How do I get to Sprinkler Fitters Local 483?
Find your warmest path to Sprinkler Fitters Local 483 through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.
Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.