Slip on the Flange/Head side

1/2" ABS Bulkhead Thread X Thread Dimensions
A - 44mm/1.72" | B - 43mm/ 1.69" | C - 27mm/1.06"

3/4" ABS Bulkhead Thread X Thread Dimensions
A - 52mm/2.04" | B - 50mm/1.98" | C - 34mm/1.33"

1" ABS Bulkhead Thread X Thread Dimensions
A - 68mm/2.67" | B - 63mm/2.48" | C - 42mm/1.65"

1 1/2" ABS Bulkhead Thread X Thread Dimensions
A - 86mm/3.38" | B - 73mm/2.87" | C - 59mm/2.32"

2" ABS Bulkhead Thread x Thread Dimensions
A - 98mm/3.85" | B - 73mm/2.87" | C - 72mm/2.83"

Installation Hole Size - Use Diamond Coated Glass Drill Bit for DIY installation
Knowing the exact size bulkhead that you will need can be a little tricky since the diameter of the hole in your tank does not exactly correspond to your plumbing size (i.e., 2.25” diameter hole does not equate to 2.25” PVC plumbing).

Selecting a Bulkhead : Click for Guide

1. Measure the diameter of the hole in your aquarium in inches or millimetres.
2. Suggested to choose the largest bulkhead that will fit in the hole in your aquarium.

Example: If your hole diameter is 1.75” then you will want to use a ¾” ABS Bulkhead, or you could choose between the ½” and ¾” Schedule 80 Bulkheads.