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Hi Rbrent, Thank you for your question. The spout o-ring of the Delta Lewiston Kitchen 21902LF-SS model can be accessed by simply unscrewing (counterclockwise) the spout, from the base. Best regards, Tanya

Hi KenH, Thank you for your question! The RP44648 O-ring shown on Amazon website should be the same. The package should include one O-ring. Best regards, Brandis

Hello Beck, Thank you for your question! I am happy to help you! Our Delta 16929-DST uses one of the RP44648 for the hub and base of the faucet. The RP51503 is used with the bonnet nut. Please contact us back for any further questions. Best Regards, Nicole

Hi Shus, Thank you for contacting Delta Faucet Company! Please accept our sincere apology for the inconvenience you are experiencing. Here is what we can do to resolve your issue for you. The first step to removing the Delta RP44648 o-ring is turning the water off to the entire unit from the supplies below the counter. The second step is to place the handle in the "On" position to drain any remaining water. Remove the wand, handle, cap, or bonnet nut, then the valve assembly cartridge. The hub of the faucet will then need to be pulled up off the counter to let the hose slip down below the counter. The hub is the base of the spout that connects near the counter. If it is hard to remove we recommend soaking it with a 50/50 solution of white vinegar and water for 15-30 minutes. Simply pry the old o-ring off the valve, clean the valve of any remaining debris then slide the new o-ring over the valve and into the groove. Below is a link to a model that uses this part for reference. https://media.deltafaucet.com/PartsDiagram/DPD-K-4353-DST%20Rev%20B.pdf Please reach out with further questions! Best Regards, Skyler Digital Communications Specialist

Hello VB, Thank you for your question! I will be happy to help. If ordering through us it is factory list price. Feel free to contact us directly if you need further assistance. Best Regards, Kyra

Hi jr549, Thank you for your question about the Delta Faucet RP44648. This o-ring is replaced by turning off the water supplies, removing the handle, and pulling the faucet hub up and off of the valve. If your faucet model has a pull-out hose, it can be disconnected under the sink and then pulled out of the faucet above the sink. See the parts diagram here for more information: https://media.deltafaucet.com/PartsDiagram/DPD-K-4353-DST%20Rev%20C.pdf Please reach out if you have any additional questions! Best Regards, Bryan Digital Communications Specialist

Hi Ken! Thank you for your question and we are happy to help. The Delta RP44648 will need the manual for the 16953-DST which can be viewed in the link below: https://media.deltafaucet.com/MandI/106557%20Rev%20E.pdf With any further questions or concerns, please do not hesitate to reach out to us again. Best Regards, Carrie