90mm Metric Cross Fitting
SKU: PVC-CRSS-90
- Commercial Hub: Facilitates complex 4-way water distribution for massive industrial filtration systems.
- Metric Precision: Specifically sized for 90mm metric PVC pipe (approx. 3.5" OD), common in commercial Reef Octopus discharge assemblies.
- Industrial Strength: Heavy-duty, grey UPVC construction provides professional durability and superior impact resistance.
- Space Efficient: Replaces multiple "Tee" fittings to create a centralized junction, reducing the overall footprint of large plumbing manifolds.
- Saltwater Safe: 100% non-corrosive and chemically inert; engineered for permanent use in high-flow marine environments.
- Ideal For: Centralized return manifolds; multi-skimmer drainage; 90mm metric plumbing hubs.
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
90mm Metric Cross Fitting
The 90mm Metric Cross Fitting is a massive junction component designed for high-capacity water management in professional aquarium exhibits, public aquaria, and industrial aquaculture facilities. Engineered specifically for 90mm Metric PVC pipe, this fitting serves as a centralized 4-way hub, allowing a primary high-volume intake to split into three separate directions or acting as a collection point for multiple large-diameter lines.
In large-scale life support engineering, managing flow to various modules—such as commercial UV sterilizers, massive media reactors, and multiple display tanks—can quickly lead to cluttered and inefficient plumbing. This 90mm cross fitting simplifies these complex layouts by providing a single, heavy-duty junction point. This reduces the number of solvent welds required and minimizes the overall footprint of your filtration manifold. Constructed from industrial-grade, thick-walled grey PVC, it is a standard component for maintaining and modifying the primary discharge and recirculating assemblies on the largest commercial Reef Octopus protein skimmers.
Key Features
True Metric Calibration: Fits 90mm OD metric pipe—essential for maintaining factory Reef Octopus commercial-grade gear.
High-Volume Connectivity: Enables clean, organized plumbing in high-flow filtration rooms and commercial racks.
Industrial Grade UPVC: Saltwater-safe construction that will not rust, degrade, or leach chemicals into the water column.
Smooth Internal Bore: Precision-molded to reduce water turbulence and prevent organic buildup in 3.5-inch diameter lines.
Deep Socket Design: All four slip-style sockets provide a massive surface area for a secure, permanent solvent weld.
Ideal For
Commercial Return Manifolds: Distributing high-volume pump output to multiple large exhibit tanks.
Centralized Filtration: Connecting multiple 90mm drain lines into a single, high-capacity collection point.
Industrial Aquaculture: Heavy-duty plumbing hubs for massive life support systems.
Images shown are representative of the product family.Materials, sizes, and configurations may vary.
What’s Included:
(1) 90mm Metric Cross Fitting
Specifications:
Size: 90mm
Configuration: 4-Way Cross
Connection Type: Slip x Slip x Slip x Slip (Socket)
Material: Industrial Grade Grey UPVC
Compatibility: 90mm Metric Pipe ONLY
- Ensure all 90mm metric pipe ends are cut perfectly square and thoroughly deburred with a specialized tool.
- Perform a dry-fit of all four ports to verify manifold alignment and equipment spacing before applying adhesive.
- Apply a generous layer of PVC primer to the pipe ends and the internal sockets of the cross.
- Apply a liberal coat of heavy-duty solvent cement (specifically rated for large-diameter pipe) to both the pipe and fitting.
- Insert the pipes into the cross with a slight twist and hold for 60 seconds to ensure a secure bond.
- Allow a minimum of 8 hours cure time before introducing high-pressure water flow.
Pro Tips:
- Metric vs. Standard. A 90mm metric fitting will not fit standard 3-inch or 4-inch USA pipe. 90mm is a specific metric outer diameter (approximately 3.54 inches). US 3-inch pipe is 3.5 inches OD, while US 4-inch pipe is 4.5 inches OD. Always measure your pipe with a caliper before beginning a commercial installation.
- Structural Support. At 90mm, a manifold junction filled with water carries immense weight. We recommend supporting the cross-fitting directly with a heavy-duty pipe bracket or stand to prevent the weight of the water from putting unnecessary stress on the horizontal plumbing joints.
- Professional Aesthetics. Use clear PVC primer instead of purple to maintain the professional, factory look of the grey UPVC. This matches the aesthetic of high-end commercial Reef Octopus equipment for a clean, industrial-grade installation.