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What size tubing is this coupler for?
It is designed for 1/2 inch tube size.
What materials can this coupler connect?
It can connect copper, PEX, and CPVC in any combination.
What does the Twist-to-Lock feature do?
It provides added security for the connection.
Can this coupler be used behind the wall?
Yes, it is approved for behind-the-wall applications.
Is it suitable for permanent installations?
Yes, it can be used for permanent installations.
Can the fitting be reused?
Yes, it can be disconnected without damaging the tubing.
Is this coupler a good choice for tight spaces?
Yes, it is described as ideal for work in tight spaces.
What model is this coupler?
This is model PEI0420.
John Guest PEI0420 coupler for 1/2 inch tube size. This Speedfit fitting joins copper, PEX, or CPVC in any combination and uses Twist-to-Lock for added security. It is approved for behind-the-wall applications, suitable for permanent installations, ideal for tight spaces, and can be disconnected without damaging the tubing.
| Model # | PEI0420 |
|---|---|
| Manufacturer | Aqua Science |
This coupler is used to join compatible 1/2 inch tube connections in a compact, straightforward setup.

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