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Hello c - 10 to 100 PSI. If you have any other questions about the ION, please call 1-800-525-2774 or email smreviews@waterpik.com.
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Hello c - 10 to 100 PSI. If you have any other questions about the ION, please call 1-800-525-2774 or email smreviews@waterpik.com.