Pro Plumbing & Fire Sprinkler Inc

Pro Plumbing & Fire Sprinkler Inc of San Francisco holds California license 1004754 (C16 Fire Protection, C36 Plumbing). The CSLB file dated Nov 1, 2026 lists it as active.¹ It expires Jun 30, 2027.

Active

Pro Plumbing & Fire Sprinkler Inc, San Francisco

License: 1004754
Class: C16 Fire Protection; C36 Plumbing
Expires: Jun 30, 2027
Bond: $25,000
Workers' comp: None on file

CSLB file dated Nov 1, 2026

From the CSLB file dated Nov 1, 2026. Not a consumer report; check the board before you hire.

Has the board taken action on this license?

None in the CSLB file dated Nov 1, 2026. Confirm with the board: CSLB license check

What bond, insurance and workers' comp are on file?

Bond: $25,000Merchants Bonding Company (Mutual), from Jul 19, 2026, continuous
Liability insurance: Not in the CSLB fileCheck with the board
Workers' comp: None on file

Who is on this license?

Officer: Jin Yuan LeiSince Jun 25, 2015
Officer: Weiquan LiSince Jun 25, 2015
Responsible managing officer: Yiuhang NgSince Jun 25, 2015

What work does this license cover?

Issued Jun 25, 2015.

C16 Fire Protection
C36 Plumbing

Which other San Francisco businesses hold C16 Fire Protection?

A G Quality PlumbingLicensed since 2003
Chung Wah Plumbing & Fire ProtectionLicensed since 2007
North Star Plumbing & Fire Protection IncLicensed since 2017
CJ Plumbing IncLicensed since 2018
SF Plumbing & Fire Protection IncLicensed since 2021

Plumbing Contractors in San Francisco California plumbing contractors

What should you check before hiring?

What to ask before you hire

Get the license number in writing. The name on the license should match the name on your contract and invoice.
Check the class covers the job. A license for one trade doesn't cover another. California license classes
Ask for a certificate of insurance sent to you by the insurance agent, not handed over by the contractor. How to read a COI
Ask who will be on site. If a crew works on your property, ask for proof of workers' comp. An exemption on file means the contractor told the CSLB it has no employees.
Put it in a written contract: license number, price, start date and payment schedule. Check the license again on the day you sign.

If the license is lapsed

Don't sign or pay a deposit until the CSLB shows the license active again.
Ask the contractor why. For a bond or insurance lapse, ask for proof that the new bond or policy was filed with the CSLB, then check again.
If work has started, hold further payments, keep the contract, receipts and photos, and file a complaint with Contractors State License Board (CSLB).
Check another contractor. California license lookup

Sources

CSLB License Master (cslb.ca.gov, Nov 1, 2026)
Contractors State License Board (CSLB)