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The topp polyethylene sewage basin cover (18") is available for purchase today.

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TOPP Polyethylene Sewage Basin Cover (18")

TOPP Industries Sump Pumps and Accessories
Model: C18SP
(Based on expert analysis, manufacturer ratings and customer reviews)
4.5 out of 54.5 out of 54.5 out of 54.5 out of 54.5 out of 5
2 Reviews
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Ships Tuesday, Feb 21st

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Injection Molded Polyethylene Sewage Basin Cover
Heavy-duty design, contractor grade construction

Pre-Drilled Hubs For Discharge Pipe & Vent Pipe
Saves time, no need to cut or drill

2" Vent Flange
Will accommodate most sewage basin applications

18" Inside Diameter
Compatible with most 18" sewage basins

Need Help? Ask Our Sump Pump Experts.
3 Pounds
Product Width
18 Inches
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  1 Question
Q: What is the actual outside diameter, and does it come with electric cord grommet and mounting hardware? Thanks.
by Bob from Colorado on November 12, 2014

A: Thank you for your interest in Sump Pumps Direct. The Topp sewage basin cover model C18SP measures 20-7/8" OD and does include an electric cord/tether cord grommet.
by Jim, Product Expert
TOPP Industries C18SP Reviews & Ratings
2 Reviews  Sort by 
George R.
Fallbrook, CA
Purchased from Sump Pumps Direct
Purchased 7/28/14
Total Reviews
2 Reviews
5 out of 55 out of 55 out of 55 out of 55 out of 5
Minor Problems With Holes
There are two minor problems with this cover.

1) There are 3 holes, but it only comes with one hole "cover" for the electrical. If you need to cover another hole, you have to buy a cover somewhere.

2) The electrical hole allows the power cable from the pump to go out nicely. But my pump had 2 power cables, so I had to adapt it a bit.

So it depends on your application.
George Recommends This TOPP Industries Product
Jim, the Sump Pump Expert
Product Expert
The reason why this cover has 3 holes is because it is a sewage basin. The hole that you covered up is the vent, which allows sewer gas escape to the outside of the building. You may want to review your installation with a licensed plumber.
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William Whiteside
Tampa, FL
Purchased from Sump Pumps Direct
Purchased 1/27/15
Total Reviews
3 Reviews
Total Helpful Votes
10 Helpful Votes
4 out of 54 out of 54 out of 54 out of 54 out of 5
Less Rigid Than Expected.
I would buy the steel one if I had it to do over again. It's not flimsy, but flexes more than I expected when walked on. I would have preferred a pipe exit on side of basin so piping didn't have to be removed just to get inside.
William Recommends This TOPP Industries Product
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