Bulkhead Fitting Installation Guide
Start here if this is your first time installing a bulkhead fitting
Get a leak-proof seal in minutes — step-by-step instructions for tanks, aquariums & hydro systems
Installation Overview
- Drill the correct hole size
- Ensure all mating surfaces are clean, dry, and free of debris
- Insert bulkhead from inside the tank
- Place gasket on the flange side (wet side)
- Hand-tighten first, then use a wrench for no more than an additional ⅛–¼ turn — do not over-tighten
- Test for leaks before full operation
Bulkhead fittings seal with gasket compression — not excessive force.
Step-by-Step Installation
Follow these steps carefully to ensure a proper seal and prevent leaks.
Avoid These Common Mistakes
Incorrect gasket placement and over-tightening are the leading causes of leaks
-
- ❌ Gasket installed on the wrong side (never install gasket next to the nut)
- ❌ Over-tightening (especially with tools)
- ❌ Rough or uneven hole edges
- ❌ Installing on curved surfaces without adjustment
Drill Hole Size Guide
Proper installation ensures a reliable, leak-proof seal and long-term performance.
Continue Building Your System
Most systems require more than just a bulkhead — complete your setup below.
