Internet #206479635

Model #41319

Store SKU #1003079152

300 Gal. Sphere 1 MH Septic Tank

Questions & Answers
  • Durable polyurethane construction is rated at 8 lbs./gal.
  • 1-piece construction above-ground tank is impact-resistant
  • Meets all the FDA specifications to ensure safe storage
  • See More Details

Frequently Bought Together


Product Overview

Norwesco is the world's largest manufacturer of molded poly tanks. Norwesco tanks are manufactured to strict quality guidelines to ensure years of high performance use. Norwesco above ground tanks and cisterns are manufactured using resins that meet FDA specifications to ensure safe storage of potable water and are rugged, impact-resistant, 1-piece construction.
  • Meet the food and drug administration's requirements for storing potable water
  • Durable construction will last for years
  • Made of durable polyurethane
  • Tanks are rated at 8 lbs./Gal., not to be used for chemicals, fertilizers or any other product other than water

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Compare Similar Water Storage Tanks

700 Gal. Black Vertical Water Storage Tank1000 Gal. Green Vertical Water Storage Tank1000 Gal. Black Vertical Water Storage Tank
current product
300 Gal. Sphere 1 MH Septic Tank
BrandChem-Tainer IndustriesChem-Tainer IndustriesChem-Tainer IndustriesNorwesco
Name700 Gal. Black Vertical Water Storage Tank1000 Gal. Green Vertical Water Storage Tank1000 Gal. Black Vertical Water Storage Tank300 Gal. Sphere 1 MH Septic Tank
Product Width (in.)64 in69 in69 in54
View ProductView ProductView ProductView Product



Product Depth (in.)
Product Height (in.)
Product Width (in.)


Pack Size
Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
Three Year

Questions & Answers


Are there baffels inside?

Asked by CJ October 13, 2020

No, this tank does not have an internal baffel

Does the tank come with connectors or gaskets?

Asked by CJ October 13, 2020

No, the connectors and gaskets are not included

would this be a good tank for a Everbilt sewage pump

Asked by help August 25, 2020

Hi Help - The Norwesco tank mentioned has a 20" diameter manhole and includes an elevated pump stand in the bottom of the tank. Suggest you contact call Everbilt Customer Service 8 a.m. – 7 p.m., EST, Monday-Friday, 9 a.m. – 6 p.m., EST, Saturday 1-844-883-1872 for specific information about your pump dimensions. Or, if you already have the pump, simply measure it to ensure it'll fit inside the manhole cover of the Norwesco tank. Specific information on the Norwesco tank can be downloaded at

Does this unit leach form the sides or just from the inlet/outlets on top?

Asked by daltho May 11, 2020

Liquid will only flow out of the outlet pipe on the outlet side of the tank.

How do i get it

Asked by Tony February 26, 2020

contact your local store to arrange for a special order.

The lid is broken on ours. We are trying to find a replacement for it. It is about 22 “ across with a lip that is around 20“. It is black. Can yo

Asked by Ollie December 24, 2019

Enter this part number in the search field Internet #206479642 or Model # 62408 or Store SKU #1002711668. It is the 20" replacement manway cover.

Can this be used as a storage tank for household water?

Asked by Shawn October 22, 2019

Yes, you can use it in the way that you have described.

Can a septic truck come and empty this when full? I want to use this as my RV Dump station.

Asked by cando April 15, 2019

That is possible, but you had better verify with the septic truck company.

Is this tank for both gray water and black water use?

Asked by Paul April 11, 2019

yes you can use this tank for gray water. This tank is not a septic tank, so do not use it for black water.

Wat sise is manhole on top?

Asked by Tom2 February 4, 2019

The manhole is 20" diameter

300 Gal. Sphere 1 MH Septic Tank - page 2

Customer Reviews

Do you own this product? Be the first to rate it. Your feedback will help users like you to make informed decisions and will help us to improve our product offerings!
If you have questions or comments regarding the customer service you received please contact us.