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*The Angi rating for Sewer Cleaning companies in Knapp, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Sewer Cleaning needs.

*The HomeAdvisor rating for Sewer Cleaning companies in Knapp, WI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Sewer Cleaning needs.

Last update on January 19, 2026

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Legendary Plumbing, LLC
4.3(
6
)
Sewer Main - ClearSewer Main - Clear - For Business

Serving Knapp, WI and surrounding areas

In business since 2019

Free estimates

Legendary Plumbing, LLC, is a leader in providing our customers with the highest quality products and craftsmanship in an honest, efficient and professional way. Our pledge is to create successful relationships with our customers, employees, community by building trust and treating every project with the utmost integrity and exceeding expectations. \n \n\nWe look forward to working with you!

Kitchen remodel
Wells
Remodel
Shower
Response time1 day
Recommended by83%of homeowners
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Avatar for American Home Shield – Home Warranty
American Home Shield – Home Warranty
3.5(
5,688
)
Sewer Main - ClearSewer Main - Clear - For Business

Serving Knapp, WI and surrounding areas

In business since 1971

Credit card accepted

"The called Jayco plumbing in Amarillo, TX. They located my buried sewer line and cleaned out both sewer clean-outs to my new house."
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+2

Recommended by65%of homeowners
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Sewer Cleaning questions, answered by experts

A sewage smell in your crawl space is usually from a damaged or clogged pipe leaking sewer gasses or actual sewage underneath your home, but there are some other common causes. Moisture, from poor or damaged encapsulation or a malfunctioning sump pump, can harbor mold and bacteria, causing a musty smell. Pests can also get stuck in your crawl space and die, which causes a sewage-like odor.

There are several homemade solutions for clearing a clogged sink that don’t involve pouring harsh chemicals down your drain. Start by pouring hot (but not boiling) water down the drain. This can help dissolve and flush away grease and gunk. A splash of dish soap down the drain can also cut through fat and make it easier to clear the drain. For a more stubborn blockage, grab a plunger and give it a few firm pumps to dislodge the clog.

In most cases, drain cleaners will not clear a clogged sewer line, and they’re likely to damage your plumbing. Sewer lines are several inches wide, meaning any material that clogs it will need to be large. Drain cleaner can work on small clogs, but it usually won’t clear a larger one in a sewer main. Drain cleaners can also easily damage and corrode your plumbing with prolonged contact, and a clog will keep the cleaner in contact with the pipes for an extended period. Hire a professional sewer cleaner instead for a safe fix.

A sewer line should be cleaned at least once every 18 to 22 months. The process takes about 30 minutes or up to 5 hours, depending on the size of the line, how easy it is to access, and how long it’s been since the previous cleaning. If your sewer line hasn’t been cleaned in a couple of years or you don’t even know the last time it’s been cleaned, it’s time to call a pro.

It is safe to flush small amounts of bleach down the toilet. Don’t flush more than ¼ cup of bleach. Instead, consider diluting it and pouring it down the sink drain.

The Knapp, WI homeowners’ guide to sewer cleaning services

From average costs to expert advice, get all the answers you need to get your job done.

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