Hubbell Geyser-RO Installation & Owner's Manual page 9

Wrap all male ¾" NTP* threads (brass nipple, diptube, and PEX fittings) with the supplied Teflon Tape.
*NTP fittings do not include fittings on Geyser front panel. These are standard hose thread fittings.
Install 4" x ¾" brass nipple into the drain valve opening.
Do not over tighten the brass nipple.
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