Thank you for your question. Delta Faucet model # 16930-SSSD-DST does have an aerator that may get clogged with mineral deposits to prevent proper flow. There is a replacement aerator with a wrench available to take it out with model # RP50815.
You may also try soaking the whole sprayhead overnight in a 50/50 solution of white vinegar and cold water to loosen any mineral deposits.
Date published: 2013-10-22