Dear GeeMoney, Thank you for your inquiry! The RP51685 is the correct mounting bracket that goes with the Delta Leland Pull-Out 9178-AR-DST faucet. Please see the Parts Diagram for this faucet, in the below link. https://media.deltafaucet.com/PartsDiagram/DPD-K-9178-DST.pdf Best regards, Tanya
Dear Jvaughn, Thank you for your question. The Delta Mounting Bracket RP11721 will work with the Delta Debonair Kitchen Pull-Out 16927-SD model (non-DST). This would be used if your faucet has the old copper tubes coming out the bottom, below the sink. Best regards, Tanya
Hi Freddy, Thank you for your question. Delta Faucet model # RP11721 is not the correct mounting bracket for the 19922-SSSD-DST. Please use the RP51685. Thanks. Jody
Hi PB, Thank you for your question. Delta Faucet model # RP11721 is a mounting bracket and model RP52609 is another mounting bracket. They do not work together. Thanks. Jody
Yes. That's what I have and it works fine. Keep your old nut.