Tank Bulkhead 1½”

DN40 (1 1/2″) Tank Bulkhead Fitting

DN40 (1 1/2″) Tank Bulkhead Fitting – High-Flow, Leak-Proof Port Connector for Large Tanks

The DN40 (1 1/2″) Tank Bulkhead Fitting is a heavy-duty, essential component for plumbing large water storage systems where high flow rates are required. This robust connector is designed to be fitted securely through the wall of any thick-walled container, creating a reliable, watertight, threaded port with a substantial 1 1/2-inch diameter. Constructed from high-strength, corrosion-resistant plastic, the fitting ensures long-term durability against water and chemicals.

Its multi-piece compression design utilizes large hexagonal nuts to tightly clamp the tank wall, guaranteeing a powerful, leak-proof seal. The prominent hexagonal shape allows for easy installation and secure tightening with a standard wrench. The large internal threading is compatible with standard 1 1/2-inch pipe fittings, enabling the attachment of high-flow valves, large drain pipes, or specialized filtration equipment.

Key Benefits

• High-Flow Capacity: 1 1/2″ diameter is ideal for rapid filling, drainage, and circulation in large systems.
• Watertight Seal: Compression design guarantees a reliable, leak-proof connection through tank walls.
• Corrosion Resistant: Durable plastic construction ensures zero rust and longevity in wet and chemical environments.
• Easy Installation: Large hexagonal nuts and body allow for robust, tool-assisted installation and secure tightening.
• Versatile Use: Creates secure and customizable entry or exit points anywhere on a large tank wall.

Technical Specifications

• Part Number: (Specific to the DN40 model)
• Nominal Diameter: DN40 (Approx. 1 1/2 Inch)
• Material: High-Strength, Corrosion-Resistant Plastic (e.g., PVC or PE)
• Connection Type: Threaded Female Port
• Feature: Bulkhead/Tank Connector, Hexagonal Nuts
• Grade: Industrial/Commercial/Large Residential

Perfect For

• Installing large drain and overflow ports in agricultural and industrial storage tanks.
• Connecting high-volume transfer pumps to water reservoirs.
• Commercial rainwater collection systems requiring fast input/output.
• Any large container modification where a secure, large-diameter port is needed.

Application Instructions

• Hole Preparation: Drill a clean, precise hole in the tank wall that is sized correctly for the fitting body.
• Insert Body: Insert the threaded body of the fitting through the hole from the inside (ensure any sealing gasket is in place).
• Secure Nut: Thread the large hexagonal nut onto the exposed threads on the outside of the tank wall.
• Tighten: Use a wrench to tighten the nut firmly, creating a watertight compression seal, but avoid excessive force that could damage the tank wall.
• Final Connection: Attach the desired pipe fitting, valve, or spigot to the threaded port.

Pro Tips

• For extremely rigid tank materials, apply a thin layer of silicone sealant around the compression gasket for an extra layer of protection against micro-leaks.
• When drilling the large hole, ensure the hole saw is sharp and run the drill slowly to prevent plastic warping.
• Use PTFE (Teflon) tape on the external threads before attaching pipe fittings to ensure a final watertight seal.
• Due to its large size, ensure the fitting is installed in an accessible location for maintenance and checking.

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