PVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mm
PVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mm
PVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mm
PVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mm
PVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mm
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PVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mmPVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mmPVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mmPVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mmPVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mm

PVC Double Female Threaded Straight Coupling Adapter — Dark Gray, 20mm–63mm

HomeDIYer
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By HomeDIYer®

Price:
$8.00 USD
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In stock (500 units), ready to be shipped

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Description

PVC Double Female Threaded Straight Coupling Adapter — Reliable Water Supply Connections in Dark Gray

When a leaking or mismatched pipe joint holds up your plumbing project, the right fitting makes all the difference. DIYers, plumbers, and irrigation installers who work with PVC water supply lines need a PVC double female threaded straight coupling adapter that threads on cleanly, seals reliably, and holds up to everyday water pressure without cracking or weeping at the joint.

Each piece is a dark gray PVC double internal threaded straight coupling — both ends feature female (internal) threads to accept male-threaded pipe or fittings on each side. Available in six sizes: 20mm (1/2"), 25mm (3/4"), 32mm (1"), 40mm (1-1/4"), 50mm (1-1/2"), and 63mm (2"). Pack quantities range from 1 to 15 pieces so you can stock up for larger jobs or grab a single replacement. Material is rigid PVC, dark gray finish.

Typical use cases include joining two male-threaded PVC pipes in residential water supply rough-ins, connecting threaded sections in garden irrigation systems, and making field repairs on agricultural or commercial PVC pipe runs where a straight inline coupling is needed quickly.

🔗 Compatibility: Designed for PVC water supply pipe systems. Sizes 20mm–63mm correspond to nominal pipe sizes 1/2" through 2". Thread standard is typically BSP/metric — verify your local pipe standard before ordering.
⚠️ Note: These are double internal (female) threaded fittings — both ends accept male-threaded pipe. Confirm your pipe ends are male-threaded before purchasing. Apply PTFE tape or pipe thread sealant for a leak-free seal.

✅ Key Features of These PVC Double Female Threaded Straight Coupling Adapters

  • 🔩Double Internal Thread Design — Both ends feature female (internal) threads, making this a true double female threaded PVC coupling that joins two male-threaded pipe ends inline without reducers or adapters.
  • 📏Six Size Options — Available from 20mm (1/2") up to 63mm (2"), covering the most common residential and light commercial PVC water supply pipe sizes in a single product line.
  • 🏗️Rigid PVC Construction — Made from rigid PVC material that resists corrosion, scale buildup, and chemical degradation common in water supply and irrigation pipe systems.
  • 🎨Dark Gray Finish — The dark gray color blends with standard gray PVC pipe fittings used in water supply and drainage systems, giving installations a clean, consistent appearance.
  • 📦Flexible Pack Quantities — Choose 1, 3, 5, 7, 10, or 15 pieces per order — ideal for single repairs, irrigation system builds, or stocking a plumbing supply kit for ongoing maintenance.
  • 💧Leak-Resistant Threaded Joint — Precision-molded internal threads provide consistent thread engagement when used with PTFE tape, supporting reliable leak-resistant connections in cold water supply lines.

📐 Technical Specifications — PVC Double Female Threaded Straight Coupling

Product Type Double Internal (Female) Threaded Straight Coupling Adapter
Material Rigid PVC (Polyvinyl Chloride)
Color / Finish Dark Gray
Available Sizes (OD / Nominal) 20mm (1/2"), 25mm (3/4"), 32mm (1"), 40mm (1-1/4"), 50mm (1-1/2"), 63mm (2")
Thread Type Double internal (female) threads — both ends; typically BSP or metric standard
Connection Style Threaded (both ends female / internal)
Applicable Pipe System PVC water supply, irrigation, and cold water plumbing lines
Working Temperature Cold water use; typically rated up to 60°C (140°F) — verify for your application
Working Pressure Typically 150–200 PSI for cold water at room temperature — see variant specs
Pack Quantity Options 1, 3, 5, 7, 10, or 15 pieces per order
Sealant Required Yes — PTFE tape or compatible pipe thread sealant recommended
Certifications / Standards Contact us to confirm

❓ Frequently Asked Questions

How do I choose the right size for my pipe?

Match the adapter size to your pipe's nominal size. For example, 20mm fits standard 1/2" water supply lines, 32mm fits 1" pipe, and 63mm fits 2" pipe. When in doubt, measure your existing pipe's outer diameter (OD) with calipers — nominal pipe sizes and actual OD can differ slightly by standard. A quick reference: 20mm (≈3/4"), 25mm (≈1"), 32mm (≈1-1/4"), 40mm (≈1-1/2"), 50mm (≈2"), 63mm (≈2-1/2") in actual OD terms.

What thread standard do these adapters use?

These fittings generally use BSP (British Standard Pipe) or metric internal threads common to PVC water supply systems in many regions. If you are working with NPT (National Pipe Thread) standard common in North American plumbing, verify thread compatibility before installation. Contact us to confirm the exact thread standard if needed.

Can these be used for outdoor or underground water supply lines?

PVC is generally suitable for underground cold-water supply and irrigation applications. For outdoor above-ground use, note that standard PVC can become brittle with prolonged UV exposure — wrapping or painting the fitting can help extend service life. For buried lines, PVC threaded couplings are widely used and generally perform well in cold water service.

What pressure rating do these fittings handle?

PVC threaded fittings in this size range typically handle working pressures of 150–200 PSI for cold water at room temperature. Pressure capacity decreases at elevated temperatures. Always verify the rated pressure for your specific application and do not exceed the rated working pressure of the weakest component in your system.

Do I need thread sealant or Teflon tape?

Yes — applying PTFE (Teflon) tape or a compatible pipe thread sealant to the male threads before assembly is strongly recommended. This fills microscopic gaps in the thread engagement and helps ensure a leak-free connection. Do not overtighten PVC threaded fittings, as this can crack the fitting body.

Are these fittings suitable for hot water lines?

Standard PVC is generally rated for cold water use only — typically up to 60°C (140°F). For hot water applications, CPVC (Chlorinated PVC) or other heat-rated fittings are recommended. Using standard PVC on hot water lines can cause deformation or joint failure over time.

Why buy a multi-pack instead of a single piece?

Multi-packs (3, 5, 7, 10, or 15 pcs) offer a lower per-unit cost and ensure you have spares on hand for repairs, irrigation system builds, or plumbing rough-ins where multiple connection points are needed. For large irrigation projects or commercial installations, the 10- or 15-piece packs provide the best value per fitting.

🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.

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