Nipple Nut Adaptor

The nipple nut adaptor, or Christmas tree adaptor, is used to bypass your O2 machine water bottle. Buy this concentrator part online at

Optimal Breathing

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The Nipple Nut Adaptor aka Christmas Tree Adaptor is used to bypass the water bottle to attach the long hose or long cannula directly to the O2E2. We advise against this as it may dry out nostrils.

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