Typical testing pressure for PEX plumbing systems is at least 100 psi and can vary depending on local code requirements.
Typical testing pressure in PEX radiant heating systems can be from 50-100 psi, or x2 times the operating pressure (refer to local code requirements).
The use of water for pressure and leak testing purposes can be impractical, especially during winter season, when water can freeze inside the pipes.
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