20mm Metric 90° Female to Slip Elbow Fitting
SKU: PVC-ELFST-20
- Cross-Spec Hybrid Engineering: Connects a standard 20mm metric rigid pipe directly to an imperial threaded male component at a sharp 90-degree orientation.
- Precision Female Threading: Features clean internal threads designed to screw smoothly onto standard male fittings without binding or cross-threading.
- Aquarium-Grade Dark Gray Finish: Modeled from professional high-purity uPVC that blends neatly with standard commercial marine sumps and custom manifold layouts.
- 100% Reef Safe Construction: Free from volatile heavy metal stabilizers and harmful plasticizers, making it safe for delicate marine corals and fish.
- Space-Saving 90-Degree Turn: Optimizes routing within cramped under-cabinet spaces, directional changes, and equipment intake configurations.
CoralVue 20mm Metric 90° Female to Slip Elbow Fitting
The CoralVue 20mm Metric 90° Female to Slip Elbow Fitting (SKU: PVC-ELFST-20) is a crucial fluid management component engineered to handle directional transitions between rigid metric pipe runs and threaded equipment ports. When assembling advanced marine reef filtration networks, integrating European or metric-spec plumbing setups with standard imperial threaded hardware frequently presents alignment hurdles. The PVC-ELFST-20 removes these adaptation friction points, providing a rugged, single-piece 90-degree configuration that turns tight corners while changing connection styles.
Molded to precise aquaculture tolerances, this dark gray elbow features an inline port pairing consisting of a 20mm smooth female slip socket and an internal female threaded port (functionally matching standard 1/2" gas/imperial thread profiles). The smooth slip socket is engineered to slide cleanly over 20mm metric rigid pipes for a permanent, leak-free solvent weld. The threaded opposite end provides a secure, removable mechanical link for bulkheads, return pumps, inline UV sterilizers, or media reactors. This hybrid arrangement streamlines plumbing manifolds within tight aquarium stands, reducing the count of physical joints while maintaining excellent line velocity.
Key Features
Molded Internal Pipe Stop: The slip socket port contains an integrated landing shoulder that ensures consistent insertion depth for a strong solvent weld.
Reinforced Hexagonal Hub Collar: The threaded socket exterior is molded with thick wall reinforcement to resist stress cracking when tightening down male fittings.
Low-Friction Internal Taper: A smooth interior bend sweep limits fluid shearing, localized turbulence, and detritus accumulation zones.
(Note: This retail SKU contains (1) individual standalone CoralVue 20mm Female Thread x Slip Elbow fitting. Thread sealants, solvent primers, and rigid piping are sold under separate product categories).
What’s Included:
(1) CoralVue PVC-ELFST-20 20mm Metric 90° Female to Slip Elbow Fitting
Technical Specs:
Official Manufacturing Title: 20mm Metric 90° Female Thread to Slip Elbow
SKU / Factory Part Identifier: PVC-ELFST-20
Slip Connection Hub Side: 20mm Internal Diameter Female Socket (Accepts 20mm Metric Pipe)
Thread Connection Hub Side: Internal Female Thread (Matches 1/2" Imperial Male NPT/BSP Profiles)
Primary Material Composition: Heavy-Wall Unplasticized Polyvinyl Chloride (uPVC)
Maximum System Pressure Rating: Up to 150 PSI continuous operational threshold
Maximum Thermal Operating Limit: 140°F (60°C) continuous service capacity
Primary Injection Color Finish: Dark Industrial Gray
- Ensure the 20mm metric rigid pipe is cut cleanly at a true 90-degree angle. Remove all plastic burrs along the cut edge with sandpaper or a deburring tool.
- Dry-fit the 20mm pipe into the smooth slip port of the elbow. The pipe should seat snugly against the internal shoulder stop. Mark the insertion depth on the pipe with a pencil.
- Apply a thin, even layer of PVC primer followed by PVC solvent cement to the outside of the pipe end and the internal wall of the elbow's slip socket.
- Push the pipe firmly into the slip socket with a quick 1/4 turn to spread the cement uniformly. Hold it in place for 15 seconds to lock down the chemical weld.
- Inspect the female threaded port to ensure it is clean and free of debris. Wrap 3 to 4 wraps of standard PTFE thread sealant tape clockwise around the male threads of the companion fitting.
- Thread the male fitting into the elbow by hand until snug. Use a wrench to turn it an additional 1 to 1.5 turns to secure a watertight mechanical seal. Do not overtighten.
Pro Tips:
- Never Apply Solvent Glue to the Threaded Connection Side.
CRITICAL AQUARIUM PLUMBING DESIGN TIP: When assembling this hybrid elbow, only apply PVC primer and cement to the smooth 20mm slip socket side. Applying solvent glue to the threaded port will permanently bond the threads, ruin the internal engagement profile, and melt the sealing surfaces, destroying the fitting's ability to create a removable mechanical seal.
- Always Wrap Thread Tape Clockwise to Prevent Bunching. When wrapping your male fitting with PTFE thread tape before screwing it into the female side of the elbow, always wrap the tape in a clockwise direction (looking directly at the open end of the threads). If you wrap counter-clockwise, the tape will unravel and bunch up as you screw the fitting in, leading to micro-gaps and persistent weeping leaks under system pressure.
- Hand-Tighten First to Prevent Cross-Threading Damage. Because uPVC threads can be damaged by mismatched metal or hard plastic fittings, always start screwing your male component in by hand. You should be able to complete 2 to 3 full rotations smoothly without encountering hard resistance. If it binds immediately, back it out, re-align the fitting, and try again to avoid cross-threading the internal profile.