As of July 6, 2021 we are including the fitting that screws into the pass through plug in the filter compartment. This is due to a growing number of customers having problems with leaky fittings. This change does not affect Amazon stock until it is cycled through. If you are an Amazon customer and need a fitting, please contact us directly.

UPDATE: As of 2025 we have the filter compartment nut that the pass through fitting screws into.