Sewer or Drain Backup Claim Denied? An Insurance Lawyer and Former Adjuster Explains the Water Backup Exclusion
Heavy rain hits Houston. Water comes up through a shower drain, floor drain, or toilet. A sewer line becomes blocked. Or a sump pump fails or cannot keep up.
You call your insurance company, and the claim is denied or you discover that your policy provides only limited coverage for the damage.
Today, I am a Texas insurance lawyer representing homeowners and property owners in insurance disputes. Before becoming an attorney, I spent more than a decade handling and managing claims on the insurance side, including as a licensed Executive General Adjuster.
I handled water losses involving broken pipes, plumbing failures, sewer and drain backups, appliance leaks, roof leaks, storm-related water, and other sources.
One of the first questions in almost every water claim was simple:
Where did the water come from?
The answer can significantly affect whether the policy provides coverage.
Before you read: The information below is general. Every insurance policy and claim is different. Policies contain different forms, exclusions, limitations, deductibles, and endorsements, and coverage depends on both the policy language and the particular facts of the loss. The only way to determine how coverage applies to a particular claim is to review the actual policy and evidence.
What Is a Water Backup Exclusion?
Many homeowners’ policies contain language excluding or limiting certain damage caused by water that backs up through a sewer or drain or overflows from a sump or related drainage system.
Without additional coverage, some backup losses may not be covered.
But the exact policy language matters.
If your claim was denied because the insurance company says the loss involved “water backup,” the first step is to identify the specific exclusion the carrier is relying upon and compare it to what actually happened. The Texas Department of Insurance home insurance guide provides information about homeowners policy coverage and exclusions.
Do not rely solely on the phrase used in the denial letter.
What Is a Water Backup Endorsement?
Many insurers offer additional coverage through a water backup endorsement, sometimes referred to as sewer or drain backup coverage.
The endorsement can provide coverage for certain backup losses that otherwise may be excluded or limited under the base policy.
Some homeowners have this coverage and do not realize it.
Others assume they have it and discover after a loss that they do not.
Even when water-backup coverage exists, it may have its own separate limit that is substantially lower than the dwelling limit shown on the declarations page.
That can become extremely important when water damages flooring, drywall, cabinets, contents, and other portions of the home.
Check both the declarations page and the actual endorsement to determine what coverage and limits may apply.
Backup, Plumbing Failure, or Flood? Why the Source Matters
Different water losses can leave water across the same floor but involve very different policy provisions.
Water or Sewer Backup
Water may back up or overflow through a sewer, drain, sump, or related system.
Depending on the policy, this type of loss may be excluded, limited, or covered through a separate endorsement.
Plumbing Failure or Accidental Discharge
A pipe, water heater, appliance, plumbing component, or other system may suddenly fail and release water.
Policies often address sudden and accidental discharge differently from water backup, although exclusions and limitations may still apply depending on the cause, duration, damaged property, and policy language.
For more information about claims involving plumbing failures and water damage, see underpaid water leak and plumbing damage insurance claims.
Flood or Surface Water
Water entering from outside the home may implicate different exclusions or separate flood coverage depending on the source and circumstances. The federal National Flood Insurance Program explains how flood insurance treats certain water damage and sewer backup scenarios.
The fact that water ultimately appeared in the same room does not mean every water loss is treated the same under the policy.
The source and path of the water matter.
Why the Plumber’s Findings Can Be Critical
When a water loss involves a sewer, drain, plumbing line, or other system, the plumber may have some of the most important evidence in the claim.
Ask the plumber to document:
- Where the blockage or failure occurred;
- What component failed;
- Whether roots, debris, deterioration, or another condition was found;
- Whether the affected component was inside or outside the structure;
- What repairs were necessary;
- Whether a camera inspection was performed; and
- What the plumber believes caused the condition.
Preserve:
- Photographs;
- Video;
- Camera-scope footage;
- Invoices;
- Estimates;
- Diagrams;
- Written findings; and
- Removed components when reasonably possible and appropriate.
A vague invoice saying “cleared drain” may provide far less useful information than a detailed record explaining exactly what was found and where.
Why the Path of Water Matters
Sometimes the dispute is not simply where the water originated.
It is how the water reached the damaged area.
For example, water might:
- Back up through a floor drain;
- Overflow from a toilet;
- Escape from a failed plumbing component;
- Enter through an exterior opening;
- Travel through a wall or ceiling; or
- Accumulate because a drainage system could not handle the volume.
Those distinctions can matter because policies may define or treat different sources and pathways differently.
This is why it can be dangerous to assume that every event involving a drain is automatically a “water backup” claim or that every water event is covered.
The actual facts and policy language need to be compared.
What If the City Sewer System Was Involved?
Homeowners sometimes assume that if a municipal sewer system contributed to the loss, the city must be responsible.
That is not necessarily true.
Potential liability involving a governmental entity can raise separate issues involving:
- What actually caused the backup;
- Who owned or controlled the affected component;
- Notice of the condition;
- Applicable governmental-immunity rules;
- Statutory notice requirements; and
- Other legal limitations.
The Texas Tort Claims Act addresses certain claims involving governmental entities, including statutory requirements and limitations. Its application depends on the facts and applicable law.
The fact that a municipal system was involved does not automatically establish liability.
If there is evidence that a public sewer system or governmental entity contributed to the loss, that issue may warrant separate legal review.
What If the Backup Happened During Heavy Rain?
Timing can provide useful context, but timing alone does not necessarily determine coverage.
Heavy rain may coincide with:
- An overloaded municipal system;
- Drainage problems;
- A sump failure;
- Surface-water intrusion;
- A plumbing blockage; or
- Another condition.
The investigation should identify what actually happened rather than simply assuming the cause because rain occurred at the same time.
Weather data, plumbing findings, photographs, municipal records, and other evidence may help.
What About Contaminated Water?
Sewer or drain backups can involve water containing sewage, bacteria, or other contaminants.
Depending on the circumstances, proper remediation may require more than simply drying the floor.
Qualified remediation professionals may need to evaluate:
- Porous materials;
- Flooring;
- Drywall;
- Insulation;
- Cabinets;
- Contents; and
- Other affected materials.
The appropriate cleaning and remediation depend on the nature and extent of the contamination.
The U.S. Environmental Protection Agency’s guidance on septic system malfunctions explains precautions to take when sewage backs up into a home.
Document the condition before damaged materials are removed when it is safe to do so.
At the same time, do not delay reasonable emergency measures necessary to protect health or prevent additional property damage merely for the sake of preserving evidence.
Your Duty to Protect the Property Still Matters
After a water loss, most policies require the insured to take reasonable steps to protect the property from additional damage.
That may include:
- Stopping the source when possible;
- Calling a plumber;
- Extracting standing water;
- Beginning reasonable drying measures;
- Protecting unaffected property; and
- Making reasonable emergency repairs.
Document what you do.
Keep:
- Photographs;
- Videos;
- Receipts;
- Invoices;
- Moisture records;
- Plumber reports; and
- Remediation documentation.
The Texas Department of Insurance claim tips explain the importance of documenting damage, keeping receipts, and taking reasonable temporary steps to protect your property.
Do not make permanent repairs or dispose of important evidence before the carrier has a reasonable opportunity to inspect when doing so can safely be avoided.
What If Your Water Backup Coverage Has a Low Limit?
This is a common surprise.
A homeowner may have hundreds of thousands of dollars in dwelling coverage but only a much smaller limit for water backup.
For example, the declarations or endorsement may provide a specific backup limit separate from the primary dwelling limit.
The actual amount varies by policy.
If the carrier says a sublimit applies, verify:
- What endorsement creates the coverage;
- What property and damages it covers;
- What limit applies;
- Whether the deductible applies to that coverage;
- Whether the carrier correctly characterized the loss as falling within that provision; and
- Whether other portions of the loss potentially arise from a different covered cause.
Do not assume the number quoted by the adjuster is necessarily the end of the analysis without reviewing the actual policy.
What If the Damage Exceeds the Water Backup Limit?
If the applicable endorsement clearly provides a specific sublimit and the entire covered loss falls within that coverage, the sublimit may significantly restrict the available policy benefits.
But disputes can arise over whether the carrier correctly classified all of the damage under that provision.
Again, the analysis depends on:
- What happened;
- The source and path of the water;
- The applicable policy forms;
- The endorsement language; and
- The resulting damage.
This is another area where the plumber’s findings and the complete insurance policy can become extremely important.
What Should You Do If Your Water Backup Claim Is Denied?
Start with the basics.
1. Get the Complete Policy
Obtain the declarations, policy forms, endorsements, and amendments in effect on the date of loss.
2. Identify the Exact Exclusion
Do not stop at “water backup.”
Find the actual provision the carrier relied upon.
3. Determine the Source and Path of the Water
Obtain detailed plumbing or other appropriate expert documentation.
4. Preserve Evidence
Keep photographs, videos, camera-scope footage, invoices, removed components when appropriate, remediation records, and other evidence.
5. Check for a Water Backup Endorsement
Look at both the declarations and actual endorsement.
6. Determine Whether a Sublimit Applies
If the carrier says coverage is capped, identify the policy language creating that limit.
7. Compare the Carrier’s Explanation With the Facts
Does the exclusion the carrier cited actually match what the plumber or other evidence says happened?
8. Consider Legal Review
If the amount in dispute is substantial, the source is contested, or the carrier’s coverage position does not appear consistent with the facts or policy language, an insurance lawyer at Herrera PLLC can evaluate the dispute.
The Texas Department of Insurance guidance on denied homeowners insurance claims also explains options homeowners may have when they disagree with a carrier’s decision.
Talk to an Insurance Lawyer and Former Insurance Adjuster About Your Water Claim
Water claims can turn on details that may initially seem minor:
- Where did the water originate?
- How did it enter the property?
- What failed?
- How long did the condition exist?
- What does the policy actually say?
Before becoming an insurance lawyer, I spent more than a decade handling and managing insurance claims, including water losses, as a licensed Executive General Adjuster.
Today, I use that experience to represent Texas homeowners and property owners in insurance disputes.
If your sewer, drain, or water backup claim has been denied or limited, let’s review the policy, applicable endorsements, plumbing evidence, and carrier’s coverage position.
Herrera PLLC represents homeowners and property owners in Houston and throughout Texas, in English and Spanish.
Call (832) 891-3210 for a free consultation with an insurance lawyer and former insurance adjuster.
Hablamos español.
Herrera PLLC
2339 Commerce Street, #172
Houston, Texas 77002
Phone: 832-891-3210
Email: jherrera@jh-lawpllc.com
Related Reading
- I Filed a Homeowners Insurance Claim. What Happens Next?
- The Insurance Company Is Sending an Engineer. What Should You Know?
- Roof Claim Denied for Wear and Tear or Old Damage?
Frequently Asked Questions
It depends on the policy. Many homeowners policies exclude or limit certain water that backs up through a sewer or drain, while separate endorsements may provide some coverage. Review the policy and endorsements in effect on the date of loss.
Water backup coverage is commonly provided through an endorsement that adds specified coverage for certain losses involving water that backs up through a sewer or drain or overflows from a sump or related system. The wording and limits vary by policy.
Not necessarily. Insurance policies may treat water backup, surface water, flood, and accidental plumbing discharge differently. The source and path of the water and the particular policy language matter.
If the policy contains a valid $10,000 sublimit that applies to the loss, that limit may restrict the available benefits under that coverage. However, the policy and facts should be reviewed to determine whether the carrier correctly classified the entire loss under that provision.
Detailed plumbing documentation can be extremely important. Ask the plumber to identify where the blockage or failure occurred, what was found, what caused it if known, and what repairs were necessary. Preserve photographs, video, camera-scope footage, and invoices.
Potential claims involving a city or other governmental entity depend on the cause of the loss and applicable Texas law, including governmental-immunity and notice issues. Municipal involvement alone does not automatically establish liability.
Obtain the complete policy, identify the specific exclusion or limitation, document the source and path of the water, preserve plumbing and remediation evidence, and determine whether a water-backup endorsement applies. If the amount in dispute is significant or the coverage position is questionable, consider having an insurance lawyer review the claim.
SCHEDULE A CONSULTATION
Attorney advertising. Prior results do not guarantee a similar outcome.