Overflows Systems

20" Overflow Kit

20" Overflow Kit

This is our smaller 20" overflow kit.  It has smaller 1" drains, which allows us to create a smaller external box.  The weir openings are only .5" tall, with a total distance from the top of the box only 1".  It is designed to flow between 1 - 1200 GPH.

The system includes:

(1) - Black 20" Slimline Internal Weir Overflow Box

(1) - Smoked External Box with Eurobrace and Lid

(2) - 1.5" Slip X Slip Bulkhead Installed in the Internal Weir Box

(4) - Gaskets for 1.5" Bulkheads (two per bulkhead for each side of the tank)

(3) - 1" Slip X Slip Bulkhead with Gasket

(1) - Acrylic CNC Machined 1.5" Close Ended Bulkhead Wrench

(1) - Acrylic CNC Machined 1" Open Ended Bulkhead Wrench

(1) - Acrylic 60mm Drill Template w/ Center Line, Level Line, and Water Line Etching


20” Internal
L x W x H
20” x 1.75” x 6.5”

External w/ 1" Drains
L x W x H
16.5” x 4.6 (5.0” with Spacer and Gasket) x 8.5”

Installation instructions can be found in the video below:

The free shipping only applies to orders inside the 48 contiguous states in the United States.  Orders made to Hawaii or Alaska will be processed, but prior to shipping we will need the purchaser to make up any difference in price over $30.  For example, if we ship an order to Hawaii, and the ground shipping (we will find the lowest price possible that we can) is $65, the customer would be responsible for an additional $35 to cover the above average shipping costs.

$ 189.95