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  3. PYREX 8947

PYREX 8947 Bent Vacuum Adapter Inner Outer Joints No. 105 14/20 Inner/outer

8947 Pyrex No. 105 Bent Vacuum Take Off Adapter 14/20 Inner/outer Joints

( Brand: Pyrex ), ( Manufacturer Part Number: 8947 ), ( Part Type: Vacuum Adapter Joint ), ( Unit Type: Unit ), ( Country Of Origin: United States )

Review PYREX No. 105 Bent Vacuum Take Off Adapter 14/20 Inner/outer Joints

The **Pyrex 8947 105 Bent Vacuum Adapter with 14/20 Inner/Outer Joints** is a precision-engineered glassware component designed for seamless integration into laboratory setups requiring reliable vacuum sealing and efficient fluid transfer. Crafted from high-quality borosilicate glass (Pyrex 7740), this adapter combines durability with exceptional thermal resistance, making it ideal for applications involving high temperatures, corrosive chemicals, or repeated heating and cooling cycles. The **105 bent design** provides a compact yet versatile connection, allowing for flexible orientation in apparatuses where space is limited, such as distillation setups, rotary evaporators, or vacuum filtration systems. The **14/20 inner/outer joint configuration** ensures a secure, leak-proof fit when paired with compatible glassware, thanks to the standardized taper that minimizes dead space and maximizes efficiency. Whether used in academic research, pharmaceutical development, or industrial processes, this adapter s smooth, polished surface reduces turbulence and promotes even flow, while its robust construction withstands the rigors of frequent use without compromising integrity. Built to meet rigorous laboratory standards, the Pyrex 8947 105 Bent Vacuum Adapter is a dependable choice for professionals demanding both precision and longevity in their glassware assemblies.

### **Pros and Cons of buying a Pyrex 8947 105 Bent Vacuum Adapter (14/20 Inner/Outer Joints)**

#### **Pros:**

1. **Compatibility with Standard Joints** The 14/20 inner/outer joint system is widely used in laboratory glassware, making this adapter versatile for connecting various pieces of glass equipment. It can be paired with standard ground glass joints, reducing the need for additional adapters.

2. **Durability and Chemical Resistance** Pyrex (a type of borosilicate glass) is known for its high resistance to thermal shock, chemical corrosion, and mechanical stress. This adapter is likely to withstand repeated heating, cooling, and exposure to solvents or acids without degrading.

3. **Precision Engineering** The bent design allows for flexible positioning of glassware, which can be useful in setups requiring specific angles (e.g., distillation, vacuum filtration, or reaction flasks). The 105-degree bend provides a practical compromise between compactness and functionality.

4. **Long-Term Reliability** Borosilicate glass adapters are less prone to cracking or leaking over time compared to plastic or lower-quality glass alternatives. This makes them a durable investment for frequent use in labs.

5. **Easy Cleaning and Maintenance** Glass surfaces are smooth and non-porous, making them easier to clean thoroughly compared to some plastic or rubber components. This is particularly important in applications where sterility or residue-free conditions are critical.

6. **Compatibility with Vacuum Systems** The vacuum adapter is designed to maintain a seal under vacuum conditions, which is essential for applications like rotary evaporation, vacuum distillation, or solvent extraction.

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#### **Cons:**

1. **Fragility** While Pyrex is durable, glass components can still break if mishandled, dropped, or subjected to extreme thermal shock (e.g., rapid heating or cooling). This requires careful handling and storage.

2. **Limited Flexibility in Sizes** If your lab equipment requires non-standard joint sizes or angles, this adapter may not be universally compatible. Always verify joint dimensions before purchasing.

3. **Potential for Leaks** Over time, ground glass joints can develop leaks due to wear or improper lubrication (e.g., using silicone grease instead of vacuum grease). Regular maintenance and proper sealing are necessary to prevent vacuum failures.

4. **Cost** High-quality borosilicate glass adapters are more expensive than plastic or lower-grade alternatives. For labs with tight budgets, this may be a significant consideration.

5. **Weight and Bulk** Glass adapters are heavier than plastic ones, which can be cumbersome for large-scale setups or frequent adjustments. Storage may also require more space.

6. **Maintenance Requirements** Ground glass joints require periodic cleaning and re-greasing to ensure a proper seal. Neglecting this can lead to leaks or contamination.

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### **Conclusion:**

The **Pyrex 8947 105 Bent Vacuum Adapter (14/20 Inner/Outer Joints)** is a **high-quality, versatile, and durable** component for laboratory applications requiring vacuum compatibility and precise joint connections. Its borosilicate glass construction ensures resistance to chemicals, heat, and mechanical stress, making it ideal for long-term use in demanding environments like chemistry labs, pharmaceutical research, or industrial processes.

However, its **fragility, higher cost, and maintenance needs** (e.g., joint lubrication) may be drawbacks depending on your specific requirements. If your setup frequently involves vacuum operations and you prioritize reliability and compatibility with standard glassware, this adapter is a **strong recommendation**. For applications where cost or ease of handling is a greater concern, alternatives like plastic adapters or different joint configurations may be worth considering.

### **Recommendation:** **Buy this adapter if:**

- You need a **reliable, vacuum-compatible** connection for glassware with 14/20 joints.

- Your lab requires **chemical and thermal resistance** in glass components.

- You are willing to **maintain the joints properly** to prevent leaks.

- The **durability and precision** of borosilicate glass justify the investment.

**Consider alternatives if:**

- You require **lighter, cheaper, or more flexible** options (e.g., plastic adapters or different joint sizes).

- Your setup involves **frequent adjustments or high-risk handling** where glass fragility is a concern.

- Budget constraints make higher-quality glass components impractical.

For most **serious laboratory applications**, this adapter is a **solid choice** due to its proven performance and compatibility. Always verify joint dimensions and vacuum system requirements before purchasing.

Details:

8947 105 Bent Vacuum Take Off Adapter 14/20 Inner/Outer Joints Used, see photos -BJ.

part #: 8947 prices

  • $31.00-$34.99

specifications plasticwarelabsuppy:

  • brand: Pyrex
  • mpn: 8947
  • part type: Vacuum Adapter Joint
  • unit type: Unit
  • country of origin: United States

offer plasticwarelabsuppy:

  • best offers: True
  • options: Ship-to-home
  • started: May 29, 2026
  • sold: 0
  • availability: In Stock
  • quantity: 1

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  • time: 30 Days

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  • cost: $0.00
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general plasticwarelabsuppy:

  • Medical, Lab Dental Supplies > Glassware Plasticware > Other Medical Lab Glassware
  • condition: Used

seller plasticwarelabsuppy:

  • city: Fargo, North Dakota
  • rating: 99.9%
  • # reviews: 3514
part type: vacuum adapter joint, unit type: unit, country of origin: united states,
category: business & industrial > medical, lab dental supplies > glassware plasticware > medical lab glassware, sku: 13958762944069604,
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2 offers $31.00–$34.99 USD
  • Used. Offer #1 priced at $31.00 + $0.00 shipping estimate = $31.00* total. 105 Bent Vacuum Take Off Adapter 14/20 Inner/Outer Joints Used, see photos -BJ Pyrex No.FREE SHIPPING
  • Used. Offer #2 priced at $34.99 + $10.59 shipping estimate = $45.58* total. A drip-tip on the inner joint is included 3 Way, 2 JNTS 14/20.+$10.59 shipping

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