Octo 100HOB Intake Elbow
SKU: ROP-BH100-INEB
- Genuine OEM Direct Replacement: Authentic factory-spec water intake elbow designed specifically for the Reef Octopus Classic 100HOB (BH-100) hang-on back protein skimmer.
- Standard 25mm Metric Profiling: Engineered with precise 25mm metric dimensions to ensure unrestrained water transition into the primary skimmer column.
- High-Impact Molded Polymer: Constructed from durable, marine-grade PVC composite that easily handles heavy salt crusts and aggressive cleaning schedules.
- Seamless Friction-Lock Connections: Features clean, slide-on slip sockets that firmly interlock with your native siphon extensions and surface skimmer attachments.
- 90-Degree Flow Optimization: Calibrated geometry routes incoming water lines over your aquarium rim without kinking or restricting pump performance.
- Toolless Slide-On Installation: Drops directly into your existing plumbing layout without needing messy plastic adhesives or hardware modifications.
Reef Octopus
Globally trusted for premium protein skimmers and pumps, engineered in-house for unmatched reef filtration performance.
Reef Octopus Classic 100HOB Replacement Intake Elbow (ROP-BH100-INEB)
The Reef Octopus Classic 100HOB Intake Elbow (SKU: ROP-BH100-INEB) is a genuine factory-direct OEM replacement plumbing fitting distributed by CoralVue to preserve the smooth siphon mechanics of your external hang-on back filtration loop. On an external HOB protein skimmer, the intake plumbing has to bridge the structural gap between the submerged aquarium display and the external motor assembly resting behind the glass. Because this 25mm elbow handles the immediate raw influx of water being drawn into the pump, it experiences constant mechanical pressure. Over time, frequent removal for clearing out trapped snails or algae can weaken the slip joints, and accidental twists during tank maintenance can crack the plastic molding, resulting in micro-air leaks that prevent the skimmer from holding a prime.
Replacing a fractured or worn fitting with this authentic drop-in component fully restores your system's structural integrity. The inner diameter is custom-profiled to eliminate fluid friction restrictions, allowing the pump to pull its ideal water volume for optimal air-to-water mixing. By restoring an airtight link across the tank frame, this part ensures that your skimmer starts up cleanly without irregular purging cycles or accidental collection cup overflows caused by trapped air lockups inside the pipe line.
Key Features
True Factory Sizing Profile: Sized strictly to meet original factory specifications to fit the Classic 100HOB (BH-100) siphon grid.
Smooth Internal Radius: The internal 90-degree curve is smooth-finished to prevent raw organic waste or floating debris from collecting in the bend.
Chemically Inert Formulation: Fabricated entirely from stable, non-leaching marine plastics that will not alter water parameters or harm coral tissues.
Secure Slip Connection: Engineered to maintain tight tolerances with standard metric plumbing lines for a toolless friction fit.
Verified Hardware Compatibility
Reef Octopus Classic HOB Series: Sized explicitly for the standard Classic 100HOB (commonly referred to as the BH-100) hang-on back external skimmer.
Variant Family Fitments: Compatible with specialized BH-100 configurations, including the BH-100SS, BH-100F, BH-100T, and BH-100R models.
(Note: While this fitting features a standard 25mm inner diameter shared by multiple models, make sure to use your specific model matching designation; larger units like the Classic 2000HOB utilize entirely different plumbing sizes).
What’s Included:
(1) Reef Octopus Replacement Classic 100HOB 25mm Intake Elbow Fitting
(Note: Clear skimmer bodies, pinwheel pumps, silicone intake O-rings, surface skimmer pre-filters, and return plumbing components are sold separately).
Technical Specs:
Official Manufacturing Title: Reef Octopus HOB Intake Elbow (100HOB / 25mm Variant)
SKU / Factory Part Identifier: ROP-BH100-INEB
Connection Dimension: 25mm Inner Diameter Slip Joint Socket
Angled Direction Rating: 90-Degree Flow Directional Elbow
Material Composition: Saltwater-Safe High-Impact Engineered PVC
- Turn off your protein skimmer's pump to stop all active water transit through the suction lines.
- Carefully lift the intake assembly pipes away from the aquarium frame and lay them on a clear workspace.
- Disengage the damaged or calcified elbow from the intake pipes by twisting gently to break any dried salt crust.
- Thoroughly clean the ends of your existing rigid extension tubes with a soft towel to remove any built-up coralline algae or detritus.
- Push your new ROP-BH100-INEB replacement elbow firmly onto the intake lines until the slip sockets seat flush.
- Re-hang the intake pipes over your tank rim, manually fill the skimmer column with water to prime the unit, and turn the pump back on.
Pro Tips:
Never Use PVC Glue or Cement for Installation. While standard home plumbing repairs rely on permanent solvent welding, you should never apply PVC cement, superglue, or plumbing epoxies to attach this intake elbow to your skimmer components. This connection is designed as a clean, unglued friction fit so you can easily pull the intake assembly apart for seasonal cleaning. Gluing the elbow permanently makes it impossible to remove the pipes or clear out obstructions down the road.
Keep an Eye on the Slip Joint O-Rings. When pushing the new intake elbow onto the skimmer's connection tubes, double-check the condition of the small rubber sealing O-rings located inside or around the joints. If these O-rings are pinched, dry-rotted, or out of alignment, the pump will suck small bubbles of air directly into the intake line. This air leak ruins the siphon vacuum and can cause the skimmer to constantly lose its prime or bubble erratically.
Clear Away Calcareous Build-Up with Citric Acid Soaks. Because raw, unskimmed water passes through this elbow first, it is highly prone to catching small crawling pests, fine sand grains, and accumulating pink coralline algae crusts. Never shove metal screwdrivers or wire bottle brushes into the bend to clear out a block, as this can deeply scratch the inner walls. Instead, drop the elbow into a warm bath of water mixed with pure citric acid powder for 20 minutes to safely dissolve away hard scale.