Thank you for your question. We only offer one aerator adapter, RP51505. This adapter converts 21.5X 1-6 g metric thread to 55/64”-27 standard thread. Your aerator, RP50815 has M21.5 threads, however care should be taken as we have not tested and do not recommend using this adapter with the pullout or pulldown spray wands.
Date published: 2018-02-04