Thank you for your inquiry, Edna! The aerator of the Delta Victorian Kitchen 155-DST faucet would need to be unscrewed from the end of the spout assembly, using the provided wrench tool. Then if you are installing a filter that installs directly onto the spout, you can use the RP51505 adapter to convert the spout threads to male 55/64"-27. The aerator and the adaptor should not be used together.
Date published: 2018-07-31