Basement flooding and sewer backup in Pittsburgh

Plumbers for backwater valves, sump pumps and drains.

72 pros in Pittsburgh

Pittsburgh's basement water problems have a specific history. In 2004 the remnants of Frances and Ivan reached the area within 9 days, and Ivan's rainfall on Sep 17 ranked 1st among the tropical storm events listed for the city. Backups also come from the sewer system itself: PWSA says sewage can back up when a private or public sewer is blocked, broken, or overwhelmed by heavy rain or snowmelt, and that backwater valves, downspout disconnection and trench drains must be considered case by case. That shapes how you hire. Ask any contractor why a given fix suits your house and your sewer line, rather than accepting a standard package. In Allegheny County, plumbing work needs a permit, the Health Department must approve a plumbing plan before work starts, and every permit requires a final inspection. Ask who pulls the permit and who books the inspection. Contractors doing home improvements above the state threshold must also be registered with the Office of Attorney General, so ask for their registration number.

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What to know in Pittsburgh

  • The National Weather Service says the remnants of 2 storms, Frances and Ivan, hit the Pittsburgh area within 9 days in 2004 and caused widespread flooding. Ivan's rainfall on Sep 17, 2004 was 5.95 inches, ranked 1st among the tropical storm rainfall events listed for Pittsburgh.

    National Weather Service Pittsburgh (source, opens in a new tab)

  • In 2022 PWSA and ALCOSAN completed rehabilitation of a sewer outfall near Hazelwood Green. A new flap gate keeps river water out of the sewer system when it is not raining, and a lowered upstream section of the sewer system is meant to make basement backups less likely.

    WESA (source, opens in a new tab)

Before you hire

  1. Ask which permits the job needs and who will get them; your municipal building department can tell you before work starts.

    Source: ised-isde.canada.ca (source, opens in a new tab)

  2. Get written quotes from at least three contractors for the same work, and check references from recent clients.

    Source: ised-isde.canada.ca (source, opens in a new tab)

  3. Put it in a written contract: the work, price, deposit, start and finish dates, warranty, permits and clean-up. Paying cash to skip it leaves you no recourse.

    Source: ised-isde.canada.ca (source, opens in a new tab)

Questions about hiring in Pittsburgh

Does a backwater valve or sump pump installation need a permit in Pittsburgh?

Plumbing projects in Allegheny County require a plumbing permit. The Health Department must approve a plumbing plan before work starts, and every plumbing permit requires a final inspection. Ask the contractor to say in writing who applies for the permit and who arranges the inspection. Allegheny County Health Department (source, opens in a new tab)

Do basement waterproofing contractors have to be registered in Pennsylvania?

Under the Pennsylvania Home Improvement Consumer Protection Act, contractors performing home improvements above a set yearly amount must register with the Office of Attorney General. Ask for the registration number and check it before you sign anything. Put it on the contract alongside the contractor's business details. PA Office of Attorney General (source, opens in a new tab)

Why can't I just pick one fix for sewage backups in Pittsburgh?

PWSA says sewage backups occur when a private or public sewer is blocked, broken, or overwhelmed by heavy rain or snowmelt. It says backwater valves, downspout disconnection and trench drains must be considered case by case, so ask the contractor to explain why a fix suits your house. Pittsburgh Water (PWSA) (source, opens in a new tab)

What should a written quote for basement flooding work include?

A quote should describe the work and the equipment to be installed, say who handles permits and inspection, list what is excluded, and give a start and finish timeframe. Get at least two quotes with the same scope, so you can compare like with like.