ContractorHistory

Washington contractor

A-1 PLUMBNG & EMERGENCY ROOTER

Registered in Washington for 12 years

License number
1PLUMPE878PN
UBI
602951311
Trade
General contractor(all general contractor contractors in Washington)
L&I license type and specialty
CONSTRUCTION CONTRACTOR · GENERAL
City
WALLA WALLA, WA(all contractors in Walla Walla)
Phone
(509) 525-6688

Current verification

  • Found: Active Washington contractor registration
  • Found: Current bond record found
  • Found: Current liability insurance record found
  • Found: No Attorney General complaint records found
  • Review: 1 change to this record since our records began
  • Review: 1 other license record under the same UBI

From the state records below; each section shows its source and when it was last synced.

Registration

Status
ACTIVE
Effective date
October 15, 2013
Expiration date
October 21, 2027

Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.

Related licenses

One other license number is registered under the same UBI, 602951311. A UBI identifies one business with the state; a business may hold more than one license, renew under a new number, or register a new license after an earlier one closed.

Source: L&I Contractor License Data - General, Washington State Department of Labor & Industries. Last synced October 7, 2026.

Bond

Current bond

  • Bond company
    Ohio Cas Ins Co
    Bond number
    999513045
    Amount
    $30,000
    Effective date
    October 1, 2026
    Expiration date
    Until canceled
  • Bond company
    Travelers Casualty & Surety Co of America
    Bond number
    105994418
    Amount
    $30,000
    Effective date
    October 1, 2025
    Expiration date
    Until canceled

Bond history

  • Bond company
    Travelers Casualty & Surety Co of America
    Bond number
    105994418
    Amount
    $12,000
    Effective date
    October 1, 2021
    Expiration date
    October 1, 2025
  • Bond company
    Travelers Cas and Surety Co of America
    Bond number
    105994418
    Amount
    $6,000
    Effective date
    October 1, 2013
    Expiration date
    October 1, 2021

Source: L&I Contractor License Data - Bond, Washington State Department of Labor & Industries. Last synced October 9, 2026.

Liability insurance

Current policy

  • Carrier
    American Casualty Insurance Co
    Policy number
    8035669758
    Coverage amount
    $1,000,000
    Effective date
    September 30, 2025
    Expiration date
    September 30, 2027

L&I publishes only the policy currently on file. Earlier policies are kept from our own nightly syncs, which began October 6, 2026.

Source: L&I Contractor License Data - Insurance, Washington State Department of Labor & Industries. Last synced October 9, 2026.

People

Principals L&I lists for this license.

  • KNOWLES, DAVID OTHNIELSince October 15, 2013
  • KNOWLES, JEFFERY SHAMMAHSince October 15, 2013
  • KNOWLES, JEREMY JOTHAMSince October 15, 2013

Source: L&I Contractor License - Principal Data, Washington State Department of Labor & Industries. Last synced October 9, 2026.

Attorney General complaints

No Attorney General complaint records found.

Matched on business name and city: A 1 PLUMBNG EMERGENCY ROOTER in WALLA WALLA. Complaints filed under another name or city are not included.

One other registered contractor shares this business name and city: A-1 PLUMBNG & EMERGENCY ROOTER (1PLUMPE791MW, ACTIVE). Complaints are matched by business name and city, so any complaint records shown here also appear on those pages. The records do not say which of these contractors a complaint was about.

A complaint record does not establish that the business violated the law.

Source: Attorney General Consumer Complaints, Washington State Attorney General's Office. Last synced October 9, 2026.

Record history

Changes to this contractor's state records since we began tracking them. The state's current-status tools do not show these.

  • October 8, 2026Current bond company: Travelers Casualty & Surety Co of America → Ohio Cas Ins Co

Sources

Record last synced October 7, 2026.

Check this record against the state directly on L&I's Verify a Contractor page (search by license number 1PLUMPE878PN).