6 Thornhill, ON Septic Tanks and Systems

Is the grass always greener over the septic tank? You might want to ask your Ontario septic tanks and systems expert. More 
Nelson (705) 799-7709
Lindsay, ON, CA K9V 4R5
50 miles from Thornhill
Nelson is a family operated company, committed to becoming your contractor of choice. We pursue excellence through dedication, quality, safety, and performance. We are fully... Read More 
Portable Toilets Of Wny (716) 751-9611
Wilson, NY, US 14172
47 miles from Thornhill
Wilson, NY, US 14172
47 miles from Thornhill
Palladino Excavating (716) 433-3208
Lockport, NY, US 14094
50 miles from Thornhill
Middleport, NY, US 14105
50 miles from Thornhill
Middleport, NY, US 14105
50 miles from Thornhill
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If you are building a Thornhill, ON home that isn’t near a sewer system hookup, you’ll want to hire an excavation company that specializes in septic system design and installation. You can find more septic tanks & systems in North York, Toronto, Ottawa, Hamilton and Etobicoke.

How Do Septic Tank Systems Work?


A large concrete or steel septic tank can hold up to 1,000 gallons of water. Wastewater comes down into the tank on one side from your Thornhill, ON home’s sewage pipes and leaves the tank on the other side. Gases go up through a vent pipe through the roof of the house. Wastewater flows out of the septic tank and into a drain field made of perforated pipes, deeply buried and covered in gravel-filled trenches.

The drain field tends to be about 6 feet deep and 2 feet wide. Ultimately, the size of the drain field depends on how well the soil absorbs water, with slow-absorbing soil requiring a larger drain field. About 3 feet of gravel covers the drain pipes, with dirt filling the remainder.

Installing a septic tank system is best left to a licensed advanced wastewater treatment system installer, who can anticipate what size drain field your Thornhill, ON system will need. Whether you’re working on a new build or a remodel, make sure your septic expert and installer openly communicates with your contractor or builder. Here are some related professionals and vendors to complement the work of septic tanks & systems: General Contractors, Plumbing Contractors.

Find septic tank and system professionals on Houzz. Narrow your search in the Professionals section of the website to Thornhill, ON residential septic tank and system experts and installers. Read through professional profiles for information on licensing, qualifications and experience.
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