Skip Navigation

Rely on Us for Septic Tanks in Southwestern Ontario

Underground Specialties has been producing and delivering holding tanks and septic tanks in the Southwestern Ontario region for over 35 years. Our quality and service has proven itself over the years to contractors and homeowners alike. Take a look at the different sizes of septic and holding tanks:

Septic Tanks

800 gallon/3600L 

1000 gallon/4500L
1250 gallon/5600L
1500 gallon/7000L
2000 gallon/10000L

Holding Tanks

900 gallon/4050L
1250 gallon/5600L
1500 gallon/7000L

2500 gallon/11300L

Call us today for biofilters or dosing chambers. For your convenience, we’ll deliver the product to your site with our crane-equipped trucks.

Are you searching for a 1000 gallon/4500L oil/grit separator (traffic and non-traffic rated)? Underground Specialties produces precast oil interceptors and retails plastic oil interceptors for all your environmental needs.

You can choose from a wide selection of septic tank accessories, including Infiltrator® products, solid and perforated PVC pipes, fittings, filters, risers, distribution boxes and sewage pumps. Ecoflo® plastic septic tanks are also available.

Need a Precast Concrete Structure?

Count on us to provide you with a complete line of custom concrete units.

Call Us


Underground Specialties

5340 Walker Rd, Oldcastle, ON, 

N0R 1L0

Phone: 519-737-1263

Fax: 519-737-1712



Monday – Friday: 7:00 AM – 5:00 PM
Saturday – Sunday: Closed

Other Addresses

Chatham Location:

25 Borrowman Street, Chatham, 

ON, N7M 5J5

Phone: 519-354-9243

Fax:  519-354-7064




Monday – Friday: 8:00 AM – 4:00 PM

Other Addresses

Cambridge Location:

1-131 Shearson Crescent, 

Cambridge, ON, N1T 1J3


Phone: 519-622-3185

Fax: 519-622-4666



Monday – Friday: 7:00 AM – 5:00 PM


Southwestern Ontario region and surrounding areas


Send to a friend

Send the url of this page to a friend of yours

Created by

Legal notice