25mm Metric Schedule 80 Bulkhead Slip to Slip
SKU: ROP-BK80-25MM
- Industrial Schedule 80 Construction: Molded with double-wall structural thickness compared to generic thin fittings, easily resisting stress cracks caused by structural pipe weight or heavy equipment hums.
- True Metric 25mm Slip Connections: Features unthreaded metric sockets on both interior and exterior ports, accepting standard 25mm metric rigid PVC pipe for permanent, high-velocity solvent welding.
- Premium Heavy Compression Gasket: Supplied with an extra-wide, commercial-grade rubber gasket that contours to surface flaws for a completely watertight seal.
- Deep-Thread Locknut Geometry: Formed with clean, robust outer threads and a heavy hexagonal locknut to maximize clamping pressure against tank walls without stripping or binding.
- 100% Aquarium and Reef Safe: Formulated using high-purity unplasticized polymers that do not leach toxic compounds or chemical plasticizers into high-salinity reef systems.
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
Reef Octopus Metric Schedule 80 25mm Slip x Slip Heavy-Duty Bulkhead Fitting
The Reef Octopus Metric Schedule 80 25mm Slip x Slip Heavy-Duty Bulkhead Fitting (SKU: ROP-BK80-25MM) is a premium commercial-grade tank transition component engineered specifically to establish watertight, leak-proof fluid pathways across the structural faces of glass display tanks, specialized filtration sumps, and European manufactured aquarium configurations. Passing water securely through a rigid containment barrier is one of the highest stress vulnerabilities in any custom aquarium layout. Standard residential light-weight bulkheads feature thin, easily flexed wall structures that can sheer or split under the constant side-load pressure of hanging plumbing manifolds, high thermal shifts, or natural system vibration tracking. This industrial Schedule 80 bulkhead neutralizes these structural weak points, providing heavy-wall reinforcement where your system needs it most.
Unlike standard Imperial bulkheads common in North America, this bulkhead is precisely calibrated to true European metric plumbing standards. It features unthreaded 25mm Socket Slip (hub) connection ports on both its front-flange facing and rear-tailpiece sections, making it an ideal drop-in solution or plumbing upgrade for high-end imported tanks like Red Sea or Waterbox systems that use factory metric pipes. The dark gray structural polymer composition complies with rigid industrial manufacturing parameters, providing a clean, rugged look behind overflow weirs and inside filter cabinets. Sandwiched against the broad front flange is an oversized, custom-molded rubber compression gasket. When the heavy-duty rear locking hex nut is cranked down, this gasket creates an absolute mechanical seal that absorbs micro-imperfections along your glass or acrylic surfaces, holding up under relentless pressure and blocking moisture creep completely.
Key Features
Perfect for Imported Metric Tanks: Provides a direct, reliable plumbing integration pathway for standard 25mm European plumbing pipe setups without requiring clumsy metric-to-imperial adapters.
Protects Against Structural Pipe Leaning: The industrial gray thick-wall profile handles heavy vertical pipe weight from long drain drops without cracking the bulkhead throat.
Chemical and Saltwater Isolation: Resists structural softening and chemical degradation from continuous saltwater tracking or concentrated chemical additives.
(Note: This retail SKU contains (1) standalone Reef Octopus 25mm Schedule 80 dark gray PVC bulkhead assembly, which includes (1) main threaded metric body flange, (1) heavy-duty matching locking hex nut, and (1) pre-fitted compression rubber gasket. PVC cements, cleaning primers, and metric pipes are sold under separate product categories).
What’s Included:
(1) Reef Octopus ROP-BK80-25MM 25mm Schedule 80 PVC Slip x Slip Bulkhead Body
(1) Heavy-Duty Metric Schedule 80 Locking Hex Nut
(1) Premium Self-Seating Black Rubber Compression Gasket
Technical Specs:
Official Manufacturing Title: 25mm Metric Schedule 80 PVC Tank Fitting (Slip x Slip)
SKU / Factory Part Identifier: ROP-BK80-25MM
Front Flange Internal Port Profile: 25mm Metric Socket Slip (Receives 25mm Standard Metric PVC Pipe)
Rear Tailpiece Internal Port Profile: 25mm Metric Socket Slip (Receives 25mm Standard Metric PVC Pipe)
Material Wall Classification: Heavy-Duty Schedule 80 (Industrial-Wall Thickness)
Clamping Gasket Compound Matrix: High-Density Synthetic Rubber Gasket
Required Tank Hole Drill Diameter: 1-3/8" to 1-1/2" (35mm - 38mm Standard Range)
Maximum Tank Clamping Thickness: Accepts glass or acrylic up to 1.00" Thick
Primary Injection Mold Color: Dark Charcoal Gray
Official Manufacturing Standards: DIN / ISO Metric Plumbing Standards, NSF Certified Safe
While most of our equipment carries a one-year manufacturer's warranty, consumable products like fish and coral foods are not covered under traditional warranty terms due to their perishable nature and varied storage conditions. However, we fully stand behind the quality of every product we sell. If you experience any issues with your food purchase shortly after receiving it, such as concerns about freshness, packaging integrity, or product quality, please contact us at [email protected]. We're committed to making it right and will work with you to resolve any problems quickly and fairly.
- Verify your drilled tank hole dimensions. Ensure the opening measures between 35mm and 38mm and that the surrounding glass or acrylic surfaces are free of chips or burrs.
- Clean the area around the hole on both sides of the tank with water and a soft towel to eliminate any dust, grease, glass shavings, or plastic particles before installing.
- Place the black compression gasket over the threaded body of the bulkhead, pushing it flush against the wide front flange face.
- Insert the bulkhead shaft through the hole from the inside of the tank. The flange and rubber gasket MUST sit on the wet side of the tank. The dry side should only contact the hard nut.
- Thread the heavy locking hex nut onto the tailpiece from the dry exterior side of the tank. Turn the nut clockwise by hand until it sits firmly flush against the outer wall.
- Hand-tighten the nut securely, then use a specialized bulkhead wrench to turn it an additional 1/4 to 1/2 turn. Do not over-torque, as this can split glass or pinch the internal gasket out of shape.
Pro TIps:
- Gasket Placement Rule: The Rubber Gasket Always Goes on the Flange Side.
CRITICAL AQUARIUM PLUMBING WARNING: No matter if you install this bulkhead vertically through a tank bottom or horizontally through a back overflow wall, the black rubber gasket must always rest directly between the wide molded body flange and the glass. Never place the rubber gasket on the side with the spinning locking hex nut. Spinning the hard plastic nut directly against a dry rubber gasket will twist, tear, or warp it out of its tracking groove, causing a permanent leak.
- Never Slather Silicone or Liquid Thread Dopes onto Bulkhead Gaskets. When sealing the ROP-BK80-25MM, keep the black rubber gasket completely dry and clean. Do not apply aquarium silicone sealants, plumbing dopes, or petroleum-based greases onto the gasket face or body threads. The rubber gasket is engineered to form a reliable compression seal against clean glass entirely on its own. Adding wet compounds can cause the rubber to slick out, warp, or slide out of position under compression, increasing your risk of a sudden leak down the line.
- Unscrew and Remove the Bulkhead Assembly Before Gluing Any Pipe Runs. Because this is a metric slip-to-slip bulkhead, you will use standard liquid PVC primer and solvent cement to connect your pipes. Always separate the bulkhead from your tank glass before applying glue. If you attempt to glue your 25mm plumbing pipes into the bulkhead while it is clamped to the tank, the expanding chemical vapors from the PVC solvent cement can seep into the tight gaps around the glass, attacking and permanently clouding your acrylic panels or micro-fracturing your glass walls.