Plumbing Providers

The plumbing providers indexed on this provider network cover water filtration contractors, licensed plumbers specializing in filtration system installation, and related service providers operating across the United States. Each entry represents a business or individual licensed to perform plumbing work within their respective state jurisdiction. The providers support service seekers, procurement professionals, and researchers locating qualified providers in the water filtration segment of the plumbing industry. For context on how this provider network fits within the broader reference framework, see the Water Filtration Provider Network Purpose and Scope page.

How to read an entry

Each provider entry is structured to convey professional identity, service scope, and jurisdictional reach at a glance. Entries are not endorsements — they are indexed records drawn from publicly available licensing data and provider submissions.

A standard entry contains the following fields in order:

Business or practitioner name — Legal operating name as registered with the relevant state licensing board.
License type and number — Specifies whether the holder carries a master plumber, journeyman, or specialty contractor license, and the alphanumeric identifier issued by the state authority.
Jurisdiction — The state or states in which the license is active and work may legally be performed.
Specialty classification — Indicates focus areas such as point-of-entry (POE) system installation, point-of-use (POU) filtration, reverse osmosis system plumbing, or whole-house water treatment integration.
Verification status — A flag indicating whether the license was cross-checked against the issuing board's public lookup tool at the time of indexing.
Contact method — A phone number, web address, or both, as provided by the verified entity.

License type is the single most consequential field. A master plumber license permits independent contracting and system design; a journeyman license requires supervision by a master. In most states, specialty contractor licenses cover filtration equipment installation but restrict scope to that category. Comparing these three license types matters when a project requires system design modifications, permit applications, or inspection sign-off — all of which typically require a master license holder.

What providers include and exclude

Providers on this provider network are scoped to the water filtration segment of the plumbing industry. The Water Filtration Providers index focuses specifically on providers whose documented service scope includes filtration system work.

Included:

State-licensed plumbing contractors with documented filtration installation capability
Water treatment equipment dealers who hold active plumbing contractor licenses
Specialty filtration contractors licensed under state plumbing codes (e.g., those following the Uniform Plumbing Code administered by the International Association of Plumbing and Mechanical Officials, or the International Plumbing Code published by the International Code Council)
Providers operating in commercial, residential, and light industrial settings

Excluded:

Unlicensed handymen or general contractors without documented plumbing licensure
Equipment manufacturers who do not perform installation services
Water quality testing laboratories that do not hold plumbing contractor status
Providers whose licenses have lapsed, been suspended, or been revoked at the time of indexing

The distinction between a licensed plumbing contractor and a water treatment dealer who installs their own products is operationally significant. Under most state plumbing codes, connecting any device to a potable water supply line requires a licensed plumber to perform or supervise the connection. An equipment dealer operating outside that requirement may be in violation of state plumbing statutes, even if the device itself is certified under NSF/ANSI Standard 58 (reverse osmosis systems) or NSF/ANSI Standard 42 (aesthetic effects filtration).

Verification status

Verification status reflects the currency and method of license confirmation at the time a record was added or last reviewed. Three status designations appear in the providers:

Verified — License number was confirmed active through the issuing state board's public lookup tool.
Self-Reported — Provider submitted license information directly; cross-check against the state board database has not been completed.
Unverified — License information is present but could not be confirmed through available public sources at time of indexing.

Verification is a point-in-time check, not a continuous monitoring service. Licenses expire, are suspended, or are revoked on an ongoing basis through state licensing authorities — for example, the California Contractors State License Board (CSLB) or the Texas State Board of Plumbing Examiners (TSBPE). Any service seeker conducting due diligence on a provider should independently confirm license status directly with the issuing agency before entering a service agreement.

Permit and inspection requirements add a second layer of verification relevance. In jurisdictions that require permits for filtration system installation — which includes most municipalities under adopted versions of the IPC or UPC — only a licensed contractor may pull the permit. A provider with verified master plumber status is the baseline indicator of permit-pulling eligibility.

For guidance on navigating this resource, the How to Use This Water Filtration Resource page describes search and filtering conventions in detail.

Coverage gaps

The provider network does not achieve complete national coverage. Identifiable gaps exist in the following areas:

Rural and frontier counties — Licensing data from rural jurisdictions across states such as Montana, Wyoming, and the Dakotas is less consistently digitized by state boards, limiting indexed provider counts in those areas.
Tribal lands — Water system infrastructure on tribal lands may fall under EPA tribal program jurisdiction rather than state plumbing codes, and contractor licensing requirements differ accordingly.
States without statewide plumbing licensure — As of the most recent legislative surveys by the National Center for Construction Education and Research (NCCER), a small number of states delegate plumbing licensure entirely to county or municipal governments, creating fragmented data environments that reduce index completeness.
New market entrants — Providers who received licensure within the past 12 months may not yet appear if state board data exports used during indexing predate their licensing date.

Coverage gaps are not uniformly distributed. High-population states with centralized licensing databases — including Florida, Illinois, and Oregon — have higher index saturation than states relying on local jurisdictional records. Researchers requiring exhaustive coverage for a given geography should treat this provider network as a starting point and supplement with direct queries to state licensing boards.

Plumbing Providers

How to read an entry

What providers include and exclude

Verification status

Coverage gaps

References

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