Built Around the Claim That Defines the Trade — Water.
Protecting plumbing contractors, crews, and completed work
Plumbing contractors are underwritten differently from other trades for one reason: water damage. A failed connection, a slow hidden leak, or a misdiagnosed slab leak can cascade through floors and units and surface weeks after the job — the single largest share of property-damage claims filed against plumbers. Add sewage backups, drain-cleaning chemicals, torch fires, and trench work, and it's clear a plumbing business needs coverage shaped around its real exposures, not a generic contractor policy. This is a specialized corner of contractor insurance built for how plumbers actually get sued.
Properly structured coverage protects your crew, your clients, and the work you leave behind the walls.
The Plumber's Signature Exposure
Water damage is the defining plumber claim, and it is often discovered late. A leaking joint on an upper floor can drip for weeks before a ceiling collapses; a misread slab leak can flood flooring and structure; a burst connection in a multi-unit building can damage several condos at once and drag in mold remediation. Carriers price water damage heavily into the general liability rate and frequently attach habitational or multi-unit exclusions on service plumbers — so it matters enormously that your completed-operations and water-damage coverage actually respond when a leak cascades.
There's a second, quieter trap: pollution. Sewage backups, drain-cleaning acids, and category-three "black water" are pollution claims, not ordinary property damage, and the standard general-liability pollution exclusion wipes them out at the form level. Drain, sewer, and hydro-jetting crews need standalone pollution coverage to close that gap.
Key Risks in Plumbing Work
Plumbing contractors face exposure related to:
Water damage from failed connections, leaking joints, and faulty installations
Slow hidden leaks that surface weeks later and cascade across floors or units
Misdiagnosed slab leaks that flood flooring and structure
Sewage backups and drain-cleaning chemical releases — excluded as pollution
Torch and brazing fires during repipes and repairs
Frozen-pipe bursts, a seasonal spike
Trench collapse and gas or utility strikes on sewer and excavation work
The delayed, cascading water claim — and the pollution exclusion behind sewage work — are the exposures that catch plumbers off guard.
Core Coverages for Plumbers
A properly built plumber program typically includes:
General Liability with Water Damage Coverage — Covers third-party injury and property damage from your work, and must confirm a water-damage endorsement and completed-operations that respond to multi-unit cascades.
Contractors Pollution Liability — Covers sewage, drain-chemical, and microbial claims the general-liability pollution exclusion denies — essential for drain, sewer, and jetting crews.
Workers' Compensation — Provides legally required coverage for burns, lifting injuries, and trench and excavation hazards.
Commercial Auto — Covers service vans and trucks, with hired-and-non-owned auto for employees' vehicles.
Tools & Equipment / Inland Marine — Covers cutters, torches, cameras and locators, jetters, and truck stock.
Installation Floater — Covers water heaters, fixtures, boilers, and materials staged or being installed before acceptance.
Contractors' Professional Liability — Protects against diagnostic, backflow-certification, and negligent-work claims general liability excludes.
Umbrella / Excess Liability — Adds higher limits above general liability and auto for a severe multi-party water loss.
Contractor License Bond — Satisfies the surety bond many jurisdictions require for licensure — consumer protection, not liability coverage for you.
What's Commonly Overlooked
Plumber programs are most often weakened by:
A habitational or multi-unit exclusion that guts water coverage on the work you actually do
No standalone pollution coverage for drain, sewer, and hydro-jetting crews
Completed-operations or water-damage coverage missing from the dec page entirely
No installation floater for water heaters and staged materials
Confusing the license bond with liability insurance
The costliest gaps are the water endorsement that doesn't reach multi-unit work and the missing pollution cover.
Real-World Claim Examples
A misdiagnosed slab leak damages flooring and structure and causes mold
A soldered joint leaks for weeks, collapsing a ceiling in a finished home
Hydro-jetting pushes sewage into a finished basement — denied under the pollution exclusion
A brazing torch ignites concealed framing during a repipe
A trench collapse or gas-line strike occurs during sewer or excavation work
Any one of these can exceed a policy that treats a plumber like a generic contractor.
Licensing & Code Context
Most jurisdictions license plumbers in tiers — apprentice, journeyman, and master — with the master or qualifying party enabling permits, and often license specialties such as septic, sewer, backflow, and gas-fitting separately. Work is governed by the Uniform or International Plumbing Code and enforced through permits and inspection, and many areas require annual backflow-preventer testing by certified testers, an ongoing professional responsibility tied to protecting the public water supply. OSHA trenching, hot-work, and confined-space rules apply to the field crews.
Why Proper Placement Matters
Underwriters split your payroll and receipts across residential and commercial and, heavily, service versus new construction, and they scrutinize habitational and multi-unit work for its cascade potential. Gas-line, sewer, hydro-jetting, and excavation work all raise the premium, and carriers confirm the water-damage endorsement, the completed-operations extension, and any habitational exclusion before binding. Placing the account with a market that prices and covers water damage correctly is what keeps a leak from becoming an uninsured loss.
Our Approach
At Cory Washington & Co., we insure plumbing contractors around the claim that defines the trade — water — and the pollution exclusion that hides behind sewage work. We confirm the water-damage endorsement reaches your multi-unit jobs, add standalone pollution coverage for drain and sewer crews, and coordinate workers' compensation, auto, tools, and umbrella into one program placed with trade-savvy markets. We also insure the rest of the trades, including electricians, HVAC contractors, roofers, and general contractors, and the broader contractor category.
The damage behind the walls is where plumbers get sued — your coverage should be built to answer for it.
All insurance descriptions on this website are provided by Cory Washington & Co. LLC strictly for general informational purposes. They are not intended to be, and should not be relied upon as, legal, financial, or insurance advice. The information presented is general in nature and does not guarantee the availability, terms, conditions, or scope of any insurance coverage. Actual coverage is determined solely by the specific policy language issued by the insurer and remains subject to underwriting approval. Nothing on this website creates or implies an agent-client relationship, binds coverage, or alters any existing policy. Cory Washington & Co. LLC expressly disclaims any liability for actions taken, or not taken, based on the content provided here. For advice regarding your particular situation, please consult directly with a licensed insurance professional at Cory Washington & Co. LLC or another qualified insurance professional, and always review your policy documents in full.
Frequently Asked Questions
How do I get plumber insurance through Cory Washington & Co.?
Request a quote or contact our team. We start with a short conversation about your operations, analyze your exposures, then negotiate plumber insurance across multiple carriers that compete for your account and present options with the trade-offs explained. Cory Washington & Co. LLC is licensed in all 50 states.
How much does plumber insurance cost?
Premiums vary from business to business. The main drivers of plumber insurance pricing are the nature of your operations, your revenue and payroll, your loss history, and the limits you carry. Rather than quote a flat figure, we negotiate across several markets and walk you through the options, so you only pay for the protection you actually need.
Who needs plumber insurance?
Requirements vary. Plumber insurance may be mandated by statute, or required under your contracts, leases, or loan agreements — and in many cases it is simply prudent given the risks involved. We look at your specific obligations and exposures, then recommend the coverage and limits that fit.
What if another agency has already declined or non-renewed my coverage?
Difficult, specialty, and previously-declined placements are a core part of our work. We access excess & surplus (E&S) and specialty markets that many generalist agencies cannot, and we explain the trade-offs clearly so you can decide with confidence.
Available in all 50 states. See how requirements differ in California, Texas, Florida, New York, or choose your state.