Octo 25mm VarioS 2S Output Adapter
SKU: ROP-OA-25THN
- Direct Skimmer Retrofitting: Connects the threaded output volute of a controllable VarioS 2S DC pinwheel pump straight to your skimmer's internal riser network.
- True 25mm Thin Profile: Features a narrow, space-saving 25mm metric slip socket designed specifically to accommodate cramped internal skimmer bodies.
- Prevents Pressure Bleeding: Molded with a precision internal indexing shoulder to compress a rubber sealing o-ring, stopping micro-bubble loss inside the sump.
- Heavy-Wall PVC Structure: Injection-molded from robust, chemical-resistant industrial polymer that handles high-velocity saltwater friction without breaking.
- Preserves DC Flow Rates: Smooth internal transition paths minimize backpressure, keeping the adjustable air-to-water fractionating mix perfectly stable.
- Genuine Factory OEM Part: Distributed directly by CoralVue / Reef Octopus to match original manufacturer design tolerances and preserve equipment warranties.
Reef Octopus 25mm Thin VarioS 2S Pump Output Adapter
The Reef Octopus 25mm Thin Output Adapter (SKU: ROP-OA-25THN) is an essential, high-tolerance plumbing component engineered specifically to adapt the adjustable-speed VarioS 2S DC controllable pinwheel skimmer pump to smaller, compact internal reef protein skimmers. When replacing a standard single-speed AC pump with a controllable DC alternative, spatial matching is critical. Standard retail VarioS 2S pump kits package bulky 32mm or 1-inch plumbing unions out of the box, which are far too massive to clear the neck thresholds of compact skimmer bodies. This specialized "Thin" profile adapter screws straight onto the VarioS 2S volute face, converting the outlet into a sleek, narrow 25mm smooth metric slip fitting that drops cleanly inside space-restricted filtration columns.
Molded from commercial-grade, UV-stabilized black PVC, this genuine factory replacement fitting is purpose-built to withstand constant high-frequency vibration and aggressive saltwater environments. By securing a perfectly flush mechanical transition, the ROP-OA-25THN ensures that the micro-bubble cloud generated by your DC needlewheel enters the primary skimmer reaction chamber without popping prematurely or leaking back into your sump basin. This tight, unrestrictive seal allows you to comfortably take advantage of the variable speed programming, feed modes, and safety float switch capabilities of your smart VarioS controller without suffering from pressure drop-offs.
Key Features
Ultra-Slim Footprint Design: Minimizes total plumbing volume inside the skimmer body to maximize space for reaction bubbles.
Vibration Resistant Threading: Coarse-pitch collar threads smoothly onto the VarioS 2S pump housing, maintaining a secure lock even during high RPM shifts.
Maintains Peak Air Induction: Features a restriction-free internal bore that easily accommodates the pump's native variable air-injection rates.
Simple Toolless Maintenance: Allows you to unscrew the pump from the skimmer body line in seconds for routine acid baths and needlewheel wipe-downs.
Genuine CoralVue Component: Guarantees absolute compatibility with factory o-rings, avoiding the hairline leaks common with generic plumbing fittings.
Verified Skimmer Upgrade Compatibility
Super Reef Octopus (SRO) Series: SRO-1000INT
Reef Octopus Classic INT Series: Classic 110-INT (CLSC-110INT), Classic 150-INT (CLSC-150INT)
Reef Octopus DNWB/Other Series: DNWB-110, Classic 90-HOB (Intake configurations)
What’s Included:
(1) Reef Octopus 25mm Thin VarioS 2S Pump Output Adapter
(Note: VarioS 2S pump assemblies, internal sealing o-rings, and skimmer bodies are sold separately)
Technical Specs:
Official Model Name: Reef Octopus 25mm Thin Output Adapter (VarioS 2S)
SKU / Part Number: ROP-OA-25THN
Input Interface Side: Threaded Female VarioS Pump Volute Collar
Output Interface Side: 25mm Inner Diameter Smooth Metric Thin Slip Socket
Material Composition: Injection-Molded UV-Stabilized High-Impact Black PVC
Primary Application: Direct Replacement Plumbing Component for VarioS 2S
- Turn off your protein skimmer's VarioS controller via its dashboard panel and lift the entire skimmer unit out of your sump to work on a clean table.
- Remove your skimmer's legacy pump or worn-out adapter fitting from the bottom internal intake line.
- Check that your factory rubber o-ring seal is seated completely flat inside the base recess of the 25mm thin output adapter.
- Align the female threads of the adapter over the male threads of the VarioS 2S pump volute snout and spin it clockwise until it is hand-tight.
- Lightly lubricate the outer edge of your skimmer's internal 25mm plumbing pipe with a thin film of marine-grade silicone grease.
- Slide the smooth 25mm thin slip end of the pump assembly straight onto the skimmer's intake pipe, pressing firmly until a tight friction-lock holds it in place.
Pro Tips:
- Never Forget the Internal O-Ring. When installing this adapter onto your VarioS 2S pump, always verify that the rubber sealing o-ring is seated flat inside the female threaded base before tightening. Without this seal, pressurized water will continuously spray out from the threads under your sump's water line. This under-surface leak bleeds valuable air velocity away from the skimmer body, severely reducing your organic skimming efficiency.
- Hand-Tighten Only. Never use heavy pipe wrenches, channel locks, or pliers to tighten this adapter down onto your pump volute. The threads are cut from precision structural PVC plastic. Forcing the connection with metal tools can easily cross-thread the fittings, warp the o-ring channel, or crack the collar entirely. Firm hand-tightness is all that is required to achieve a completely airtight, leak-free hydraulic seal.
- This is Metric 25mm, Not Imperial 3/4-Inch. Keep in mind that Reef Octopus equipment is manufactured utilizing standardized global metric tooling dies. The slip end of this adapter measures exactly 25mm in inner diameter. It is not compatible with standard American Schedule 40 or Schedule 80 imperial 3/4-inch PVC pipe (which measures roughly 26.6mm outer diameter). If you are attempting a custom plumbing modification with imperial pipe, you will need to bridge the line with a dedicated metric-to-imperial conversion adapter.