75mm Metric 90° Elbow Fitting
SKU: PVC-EL90-75
- Commercial Grade: Engineered for massive water volume management in professional reef and aquaculture systems.
- Metric Precision: Specifically sized for 75mm metric PVC pipe (approx. 3" OD), common in commercial Reef Octopus discharge assemblies.
- Space-Saving: Provides a sharp 90-degree turn to maximize space in large-scale filtration rooms and sump layouts.
- Saltwater Tough: High-impact, industrial-grade grey PVC construction built for permanent marine use.
- Superior Seal: Deep-socket slip connections provide maximum surface area for a secure, leak-proof solvent weld.
- Ideal For: Commercial skimmer discharge; high-volume return manifolds; 75mm metric drain lines.
75mm Metric 90° Elbow Fitting
The 75mm Metric 90° Elbow is a robust plumbing component designed for the most demanding water management tasks in large reef aquariums, public exhibits, and industrial aquaculture installations. This fitting is precision-sized for 75mm Metric PVC pipe, the primary diameter used for the main discharge assemblies and recirculating loops on large-scale Reef Octopus Commercial protein skimmers.
In large-scale life support engineering, 75mm plumbing is used to handle extreme flow rates where standard plumbing would fail or cause significant backpressure. This 90-degree fitting allows for clean, sharp turns in tight filtration rooms while maintaining the structural integrity required for high-pressure or high-volume gravity drain applications. Constructed from industrial-grade, saltwater-safe grey PVC, this elbow features a smooth internal bore to minimize detritus buildup and ensures a permanent, high-strength bond when solvent-welded.
Key Features
True Metric Calibration: Fits 75mm OD metric pipe—essential for maintaining factory Reef Octopus commercial-spec plumbing.
Industrial Durability: Heavy-walled PVC construction designed to handle the vibrations and pressures of high-capacity pump rooms.
Flow-Optimized Bore: Precision-molded internal walls help maintain water velocity and reduce noise in high-volume plumbing runs.
Corrosion Proof: 100% non-metallic and saltwater safe; will not degrade or leach chemicals in marine environments.
Permanent High-Strength Weld: Slip x Slip configuration ensures a fail-safe connection with standard PVC solvent cement.
Ideal For
Commercial Skimmer Modification: Customizing the primary output of 75mm-diameter Reef Octopus skimmers.
Large-Scale Drain Lines: Routing high-volume gravity drains for massive exhibits and public aquarium displays.
Centralized Filtration: Creating professional, high-diameter plumbing manifolds for industrial aquaculture.
Images shown are representative of the product family. Materials, sizes, and configurations may vary.
- Ensure the 75mm metric pipe is cut perfectly square and deburred using a specialized tool or sandpaper.
- Perform a dry-fit of the 90° elbow to verify the alignment of your large-diameter plumbing run.
- Apply a generous coat of PVC primer to the pipe end and the internal socket of the fitting.
- Apply a liberal layer of heavy-duty PVC solvent cement (suitable for large-diameter pipe) to both the pipe and the elbow.
- Insert the pipe into the fitting and give it a slight quarter-turn to ensure the adhesive is fully distributed.
- Hold firmly for 60 seconds. Allow a minimum cure time of 4–6 hours before pressure testing.
Pro Tips
Metric vs. Standard 3-Inch.
A 75mm metric fitting will not fit standard 2.5" or 3" USA Schedule 40/80 pipe. 75mm is a specific metric outer diameter (approximately 2.95 inches). Standard US 3" pipe has an outer diameter of 3.5 inches, so they are not interchangeable. Always measure your pipe with a caliper before beginning a commercial installation.
Support the Weight. Large-diameter plumbing like 75mm is extremely heavy when filled with water. Ensure that your plumbing run is supported by pipe hangers or brackets every few feet to prevent stress on the 90-degree solvent joints.
Professional Aesthetics. In high-visibility commercial installs, use clear PVC primer rather than purple. This keeps the grey 75mm fittings looking clean and "industrial," matching the professional aesthetic of high-end Reef Octopus life support systems.