PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm
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PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mmPVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm

PVC Aquarium Elbow 90° Threads Tank Filter Connection Water Fittings ID 20-50mm

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By HomeDIYer®

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$11.02 USD
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In stock (500 units), ready to be shipped

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Description

PVC Aquarium Elbow & Straight Fittings ID 20–50mm — Threaded Connections for Tank, Pond & Filter Systems

Routing water lines inside an aquarium cabinet or pond filter housing often means navigating tight corners, inline connections, and panel penetrations — all with different pipe diameters. Aquarium builders, pond installers, and DIY water-system enthusiasts need PVC aquarium elbow and straight fittings that thread securely, resist moisture, and come in the exact bore size their tubing demands.

This listing covers three fitting types in one place: 90° elbows, straight couplings (inline joints), and flat washers — all in rigid PVC with threaded or slip-fit connections. Inner diameter options span ID 20mm (~¾"), ID 25mm (~1"), ID 32mm (~1¼"), ID 40mm (~1½"), and ID 50mm (~2"), covering the most common tubing sizes used in aquarium sumps, canister filters, pond pumps, and water feature plumbing. Available in White, Grey, Blue, and Dark Grey. Pack quantities of 1, 2, 4, 5, or 10 pieces let you order exactly what your build requires.

Typical use cases include routing a 90° elbow at the base of an aquarium sump return line to redirect flow horizontally, using a straight joint to extend or repair an inline section of pond filter pipework, and fitting washers at bulkhead penetrations to create a watertight seal around tank wall pass-throughs. The colour options also support colour-coded plumbing layouts where different circuits are visually distinguished for easier maintenance.

⚙️ Compatible with standard PVC tubing at the listed inner diameters. Verify your pipe OD and thread standard before ordering. Intended for cold-water aquarium, pond, and filtration applications only.

✅ Key Features of These PVC Aquarium Elbow & Straight Fittings

📦 Three Fitting Types in One Listing

Choose from 90° elbows for directional changes, straight joints for inline extensions or repairs, and flat washers for bulkhead sealing — all matched to the same ID range.

📐 Five Inner Diameter Options

ID 20mm, 25mm, 32mm, 40mm, and 50mm cover the most common tubing sizes in aquarium sumps, canister filters, pond pumps, and water feature circuits.

🎨 Four Colour Choices

White, Grey, Blue, and Dark Grey allow colour-coded plumbing layouts, making it straightforward to distinguish supply, return, and bypass circuits at a glance.

💧 Rigid PVC Construction

Moulded from rigid PVC that resists fresh water, salt water, and common aquarium treatments, making these fittings suitable for long-term submerged or wet-environment use.

🔗 Threaded Connection Design

The threaded interface allows hand-tight assembly and disassembly for maintenance access — useful in sump cabinets and filter housings where periodic servicing is expected.

📦 Flexible Pack Quantities

Order 1, 2, 4, 5, or 10 pieces per variant to match your project scope — from a single replacement fitting to a full multi-circuit plumbing build.

📐 Technical Specifications — PVC Aquarium Elbow & Straight Fittings

Material Rigid PVC
Fitting Types 90° Elbow, Straight Joint (coupling), Washer
Inner Diameter Range ID 20mm / 25mm / 32mm / 40mm / 50mm
Connection Type Threaded
Colours Available White, Grey, Blue, Dark Grey
Application Aquarium, pond, sump, canister filter, water feature plumbing
Temperature Rating Cold water only (not for hot water or steam)
Wall Thickness See variant options
Thread Standard See variant options
Pack Quantity 1 / 2 / 4 / 5 / 10 pcs

❓ Frequently Asked Questions

How do I choose the correct inner diameter for my tubing?

Measure the inner diameter (ID) of your existing pipe or tubing. The ID listed in the variant name (e.g., ID 20mm) refers to the bore of the fitting that the pipe inserts into. If your tubing has an OD of approximately 25mm, it typically has an ID of 20mm for standard-wall PVC — but always verify your specific pipe schedule before ordering.

What is the difference between the elbow and the straight joint types?

The 90° elbow redirects flow at a right angle, making it useful for turning a pipe run around a corner or down the side of a tank cabinet. The straight joint (coupling) connects two pipes in a straight line — used for inline extensions, repairs, or joining two sections of tubing end-to-end.

What are the washers used for?

The flat PVC washers are designed for use at bulkhead fittings and panel penetrations, where they create a compressive seal between the fitting flange and the tank wall or panel surface. They are sized to match the corresponding pipe ID and are typically used in pairs (one on each side of the panel).

Are these fittings safe for use in aquariums with fish?

Rigid PVC is widely used in aquarium plumbing and is considered inert to fresh water and salt water once fully cured or rinsed. It does not leach plasticisers into the water column. As with any new plumbing component, rinsing thoroughly before use is recommended.

Can I use these fittings with flexible tubing or only rigid pipe?

These fittings are designed for rigid PVC pipe at the stated inner diameters. Flexible tubing with the same ID may also fit depending on wall thickness, but a secure threaded or solvent-weld connection requires rigid pipe for consistent results. If using flexible tubing, verify the OD matches the fitting bore before assembly.

Why are there colour options — do different colours have different properties?

The colour options (White, Grey, Blue, Dark Grey) are purely aesthetic and functional for colour-coding. All colours are moulded from the same rigid PVC material and have the same mechanical and chemical properties. Colour-coding is useful in multi-circuit systems to distinguish supply lines, return lines, and bypass circuits at a glance.

How many pieces should I order for a typical aquarium sump build?

A basic sump build with a single return pump typically requires 2–4 elbows and 1–2 straight joints. A more complex system with a refugium section, skimmer feed, and multiple return lines may need 6–10 elbows and several straight joints. The 5-pcs and 10-pcs pack options offer a per-unit saving compared to single-piece orders for larger builds.

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