Backwater Valves: Your Secret Weapon Against Sewer Backups in Vancouver, WA

How a Backwater Valve Protects Your Home

A backwater valve, sometimes called a check valve or backflow prevention valve, is a relatively simple device with a big job. It’s installed on your main sewer line and has one primary function: to allow wastewater to flow out of your home to the city sewer, and to prevent it from flowing back in.

Think of it like a one-way door for your sewage. Under normal conditions, the valve remains open, allowing wastewater to exit your home freely. Inside the valve, there’s a flap or gate. When the city sewer system becomes overwhelmed, perhaps during heavy rainfall, and sewage starts to flow in the wrong direction (back towards your house), this flap automatically slams shut. This creates a seal, preventing the sewage from entering your basement and causing a messy, hazardous backup.

Choosing the Right Backwater Valve for Your Vancouver Home

Not all backwater valves are created equal. There are a few key differences to consider when choosing the right one for your home:

• Normally Open vs. Normally Closed: This refers to the position of the flap inside the valve. Normally open valves have a flap that stays open, allowing for the venting of sewer gases. Normally closed valves have a flap that remains closed, providing a tighter seal but potentially requiring additional venting. The best choice for your home may depend on your specific plumbing setup and local conditions; consult with a professional plumber to determine the most suitable option.
• Materials: Backwater valves are typically made from PVC, cast iron, or bronze.
  • PVC: Often the most affordable option, PVC is durable and resistant to corrosion.
  • Cast Iron: Known for its strength and longevity, cast iron is a heavier and more robust option.
  • Bronze: Offers excellent corrosion resistance, particularly in harsh environments, but typically comes at a higher price point.

For Vancouver’s climate, where moisture and potential corrosion are factors, a durable material like PVC or bronze might be a good choice.

Backwater Valve Installation: What Vancouver Homeowners Need to Know

Installing a backwater valve is a crucial step in protecting your home, especially if you live in a low-lying area of Vancouver or have an older sewer system. Gurgling drains and slow draining are often telltale warning signs that your home may be at risk of a backup.

The Installation Process: The process typically involves cutting into your main sewer line, which is often found in the basement floor. A qualified plumber will excavate around the pipe, install the backwater valve, and ensure it’s properly sloped for effective drainage. It’s critical to emphasize that this is not a DIY project. Incorrect installation can lead to further problems and even exacerbate the risk of backups.

Actionable Tip: Always hire a qualified, licensed plumber for backwater valve installation. This is not a DIY project and improper installation can lead to significant problems.

Installation Costs: The cost of installing a backwater valve in Vancouver can range from $750 to $4,500 or more. The final price depends on factors like the type of valve you choose and the complexity of the installation.

Vancouver, WA Regulations: It’s important to note that a building permit is required for backwater valve installation in Vancouver. You can find more information and access the necessary forms on the City of Vancouver’s Residential Building Permits page.

Because correct installation is so vital, always hire a qualified, licensed plumber. Sarkinen Restoration offers expert sewer/septic backup services, ensuring your home is protected.

Keeping Your Backwater Valve in Top Condition

Once installed, a backwater valve requires regular maintenance to ensure it continues to function properly. Think of it like any other important appliance in your home – a little care goes a long way.

Inspection Frequency: We recommend inspecting your backwater valve every six months, and always after a heavy rainstorm.

What to Look For: The main thing to check is whether the flap is obstructed by debris. This can prevent it from closing properly and allowing backflow. Some backwater valves have clear tops, making visual inspection incredibly easy. If you have one of these models, a quick glance is all it takes. If not, you may need to carefully open the valve to check for blockages.

While regular homeowner inspection is important, consider scheduling professional maintenance with a qualified plumber like Sarkinen Restoration to ensure everything is in optimal working order.

Backflow Prevention and City of Vancouver Regulations

The City of Vancouver takes backflow prevention seriously, and for good reason. Backflow, whether from a sewer backup or other sources, can contaminate the public water supply, posing a serious health risk. The city has a Cross Connection Control Program in place to minimize this risk.

A key part of this program is the requirement for annual testing of backflow preventers. This testing must be performed by a certified tester. You can find more details and frequently asked questions on the City of Vancouver’s website.

Final Thoughts

A backwater valve is a relatively small investment that provides significant protection and peace of mind. It prevents messy and potentially hazardous sewer backups, safeguards your property and belongings, and helps you rest easy, even during Vancouver’s heaviest rainstorms.

Given Vancouver’s climate and the potential for sewer system overload, a backwater valve is a wise choice for many homeowners. If you’re concerned about the risk of sewer backups, we strongly encourage you to assess your situation and consider installing a backwater valve.

References:

1. Peel Region. (n.d.). Backwater valve rebate – peelregion.ca. Retrieved from https://peelregion.ca/water/pipes-downspouts/backwater-valve-rebate
2. City of Vancouver, WA. (n.d.). Backflow and Cross-Connection Prevention. Retrieved from https://www.cityofvancouver.us/government/department/public-works/drinking-water/backflow-and-cross-connection-prevention/
3. City of Vancouver, WA. (n.d.). Backflow Details and FAQs. Retrieved from https://www.cityofvancouver.us/government/department/public-works/drinking-water/backflow-and-cross-connection-prevention/backflow-details-and-faqs/
4. City of Vancouver, WA. (n.d.). Residential Building Permits. Retrieved from https://www.cityofvancouver.us/business/building-construction/residential-building-permits/