40mm Metric Tee Fitting
SKU: PVC-TEE-40
- High-Volume Distribution: Enables the creation of 90-degree branches in 40mm metric plumbing for large-scale manifolds and drain systems.
- Metric Precision Fit: Specifically sized for 40mm metric PVC pipe (approx. 1.5" OD), the standard for high-flow Reef Octopus Regal and Elite filtration.
- Industrial Strength: Constructed from thick-walled, high-impact grey UPVC for superior durability and pressure resistance.
- Saltwater Proof: 100% non-corrosive and chemically inert; engineered for permanent use in high-volume marine environments.
- Hydraulic Efficiency: Smooth internal transitions minimize water turbulence and maintain high flow rates through the branch.
- Ideal For: Branching primary 40mm drain lines; building high-flow manifolds; installing equipment bypasses for large UV sterilizers.
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
40mm Metric Tee Fitting
The 40mm Metric Tee Fitting is a professional-grade 3-way joiner designed for high-capacity water distribution in advanced reef systems and commercial filtration. Precision-molded for 40mm Metric PVC pipe, this tee is a fundamental component for building primary manifolds, branching high-volume drain lines, or integrating large-scale equipment into your main plumbing loop.
In large-scale life support systems, structural integrity and flow efficiency are vital to prevent leaks and maximize water turnover. This tee features deep slip-fit sockets that provide a massive surface area for solvent welding, resulting in a bond that is effectively as strong as the pipe itself. Unlike standard residential PVC, this component is made from industrial-grade grey UPVC, which offers higher impact resistance and an aesthetic that perfectly matches factory-spec Reef Octopus and European filtration hardware.
Key Features
True Metric Calibration: Fits 40mm OD metric pipe—essential for maintaining factory Reef Octopus and commercial-spec hardware.
90-Degree Precision: Ensures perfectly square branches for clean, organized, and structurally sound plumbing layouts.
Marine-Grade Material: 100% non-metallic; will not rust, pit, or leach chemicals into sensitive aquatic environments.
Flow-Optimized Design: Engineered to maintain water velocity across the branch, reducing head pressure on your system.
Slip x Slip x Slip: Features three female socket connections for permanent chemical welding on all sides.
Ideal For
Primary Drain Headers: Branching 40mm gravity-drain lines to feed multiple filter socks or sumps.
High-Flow Manifolds: Creating 40mm distribution blocks for multi-tank systems.
Equipment Integration: Installing bypass loops for large-scale industrial UV sterilizers or commercial media reactors.
Images shown are representative of the product family. Materials, sizes, and configurations may vary.
What’s Included:
(1) 40mm Metric Tee Fitting
Specifications:
Size: 40mm
Connection Type: Slip x Slip x Slip (Socket)
Material: Industrial Grade Grey UPVC
Compatibility: 40mm Metric Pipe ONLY
- Ensure all three 40mm metric pipe ends are cut square and thoroughly deburred.
- Clean the pipe ends and the internal sockets of the tee with a dedicated PVC cleaner.
- Apply a layer of PVC primer to the pipe ends and all three internal sockets of the tee.
- Apply a consistent coat of heavy-duty PVC solvent cement to both the pipe and the sockets.
- Push the pipes into the tee until they seat fully, giving a slight quarter-turn to ensure even glue distribution.
- Hold firmly for 45 seconds. Allow at least 4 hours of cure time before introducing high-pressure water or full drainage flow.
Pro Tips:
- Metric vs. Standard 1.5-Inch. A 40mm metric tee will not fit standard US 1.5-inch pipe. 40mm is approximately 1.57 inches, while US 1.5" pipe has a 1.90-inch OD. Always confirm your pipe diameter with a caliper before beginning a permanent solvent weld.
- Clean Aesthetics. To maintain the professional look of your grey UPVC plumbing, use clear PVC primer rather than purple. This prevents messy stains on the fittings and keeps your filtration area looking like a factory Reef Octopus installation.
- Support the Span. 40mm water-filled pipes carry significant weight. To prevent leverage stress on the tee's joints, always use 40mm Metric Pipe Carriers within 12 inches of the branch.

