Invena Pex Compression Fittings Union - 20x16mm
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Product Information
Full details
This guide is for plumbers and DIYers installing or expanding PEX water supply systems. The Invena Pex Compression Fittings Union - 20x16mm offers a secure, corrosion-resistant connection between PEX pipes. A key benefit is its ease of installation compared to traditional metal fittings. However, users must ensure correct sizing to avoid leaks.
All features
| Model Part Number | 008 |
|---|---|
| Brand | Invena |
Extended Product Information
FAQs
What material is the Invena Pex Compression Fittings Union made of?
The fitting is made of nickel-plated brass (CW617N), and the gasket is an "O"-NBR type with a PTFE pad.
What is the maximum temperature and pressure rating?
The fitting can handle a maximum temperature of +95°C at 6 bar and a maximum pressure of 1.0 MPa (10 bar) at 60°C.
Can this fitting be used with copper pipes?
No, this fitting is specifically designed for PEX (crosslinked polyethylene) piping systems.
What sizes does this union come in?
While this specific product is 20x16mm, Invena offers PEX fittings in 16mm, 20mm, and 25mm sizes.
Do I need special tools to install this fitting?
You will need basic tools like a pipe cutter and wrenches. Unlike some other PEX systems, compression fittings do not require specialized crimping or expansion tools.
How do I ensure a watertight seal?
Ensure the PEX pipe is cut squarely, fully inserted into the fitting, and the compression nut is tightened properly using a wrench after hand-tightening. The NBR gasket and PTFE pad are crucial for the seal.
Troubleshooting
Leak at the fitting connection
Check if the compression nut is tightened sufficiently. Ensure the PEX pipe is fully inserted and the cut is square. Inspect the NBR gasket and PTFE pad for damage or debris. If necessary, loosen, reseat, and retighten the fitting.
Difficulty inserting PEX pipe
Verify the PEX pipe size matches the fitting's port. Ensure the pipe end is clean and not deformed. A slight chamfer on the pipe end can sometimes help.
Fitting won't tighten properly
Ensure the threads on the fitting and compression nut are clean and undamaged. Check that the ferrule is correctly positioned on the pipe.
Pros and Cons
Pros
- Corrosion-resistant nickel-plated brass construction
- Easy and fast installation compared to soldering metal pipes
- Flexible and resistant to scale buildup
- Suitable for both hot and cold water applications
- Reduced risk of pinholes and leaks due to material properties
Cons
- Requires precise measurement and cutting of PEX pipe
- Compression fittings can be susceptible to overtightening if not careful
- May be more expensive than some basic plastic fittings
- Only compatible with PEX piping systems
Setup, Compatibility & Care
Setup:
- Ensure both PEX pipes (20mm and 16mm) are cut cleanly and squarely.
- Slide the compression nut onto the PEX pipe, followed by the ferrule (or insert if required by the specific PEX system).
- Insert the PEX pipe fully into the union fitting.
- Slide the ferrule and compression nut up to the fitting.
- Hand-tighten the compression nut onto the fitting.
- Use an appropriate wrench to tighten the nut an additional 1-1.5 turns. *Do not overtighten.*
Compatibility:
- This fitting is compatible with standard PEX-A, PEX-B, and PEX-C pipes.
- Ensure the pipe sizes (20mm and 16mm) match the fitting's designated ports.
Care:
- PEX fittings generally require minimal care. Ensure the area around the fittings is kept clean.
- Periodically check for any signs of leakage, especially after initial installation or if system pressure/temperature changes significantly.
- Avoid using abrasive cleaners on the brass components; a damp cloth is sufficient for cleaning.