Stem Unit & Seats - 1600 Series

Thank you for your question, Benjamin! The RP1991 cartridge does not include springs. Springs would be included in RP4993 seats and springs. Best regards, Bryan

Hi cnpfarm, thank you for contacting Delta Faucet Company! Our RP1991 cartridge is used with our 1600 series tub/shower valves. This model handle rotates only. If you have a handle that lifts and then rotates to turn on, it may be our 600 series. Our 600 series uses a ball assembly. We appreciate your inquiry. Please reach out directly if you have further questions! Best Regards, Kyra Digital Engagement Specialist

Hi Valued Customer, Thank you for contacting Delta Faucet Company! Please shut off the water supplies, grab a towel, an 1/8" inch allen wrench (for a lever handle) or Philips screwdriver (for a knob handle), and a strap wrench. 1. Turn the handle on to remove excess water, and remove the handle with the allen wrench or Philips screwdriver. 2. Slide off the sleeve assembly to reveal the bonnet and the valve. 3. Using the strap wrench, please remove the bonnet nut. 4. Pull the cartridge out of the valve, and slightly wiggle if needed. 5. Remove the seats and springs in the valve. 6. We recommend flushing the valve before installing a new cartridge. 7. Please shut the shower door or curtain and turn the hot and cold water supplies on for about 2 minutes. 8. Once you flush the valve, you can install the seats and springs, the cartridge, the bonnet nut, the sleeve, and the handle. Please note that you will need to adjust the rotational limit stop for your temperature preference if you are installing a new cartridge. To adjust your rotational limit stop, use the allen wrench to loosen or tighten the set screw on the cartridge. Please note that adjusting this part may range from 4 to 16 degrees Fahrenheit. We appreciate your inquiry. Please reach out directly if you have further questions! Best Regards, Kyra Digital Engagement Specialist

Hi Frank2024, Thanks so much for contacting Delta Faucet Company about RP1991! Unfortunately, the 1600 series has been discontinued and does not have any replacements. If you are looking to upgrade the trim kit, you would need to replace the R10000-UNWS universal rough valve. Please contact us directly if you have any questions or need additional assistance. Best Regards, Nicole Digital Communications Specialist

Hello, Please accept our sincere apology for the inconvenience you are experiencing. Please contact us directly by phone at 1-800-345-3358 or email at customerservice@deltafaucet.com as we would like to resolve this matter for you at this time. Best Regards, Tim Digital Communications Specialist

Hi Eric, Thanks so much for contacting Delta Faucet Company about RP1991! The correct bonnet nut is RP6079, I have included a link below. https://www.deltafaucet.com/parts/product/RP6079.html Please contact us directly if you have any questions or need additional assistance. Best Regards, Nicole Digital Communications Specialist

Hello Customer! Thank you for your question and we are happy to help. Unfortunately, there is no way to adjust the temperature on the RP1991, we recommend replacing the seats and springs (RP4993) to improve the temperature. With any further questions or concerns, please do not hesitate to reach out to us again. Best Regards, Carrie

Hi Sean, thank you for your interest in the RP1991! The cartridge is compatible with a 1600 series. Please contact us directly if you have any questions or need additional assistance. Best Regards, Themar Digital Communications Specialist

Hello Valued Customer, Thank you for contacting Delta Faucet Company! Our RP1991 is the cartridge assembly for our 1600 series unit. We no longer manufacture the valve or the trims for this unit. We apologize for any inconvenience this may cause. We appreciate your inquiry. Please reach out directly if you have further questions! Best Regards, Kyra Digital Engagement Specialist

Hello Mark 5! Thank you for your question and we are happy to help. We apologize for this information not being readily available to you. Unfortunately, there is no way to rebuild the Delta Faucet 1600 series without replacing the entire valve. With any further questions or concerns, please do not hesitate to reach out to us directly. Thank you for being a loyal Delta Faucet customer. Best Regards, Carrie

Hello Customer! Thank you for your question and we are happy to help. The Delta RP1991 fits 1600 series trim kits. With any further questions or concerns, please do not hesitate to reach out to us again. Best Regards, Carrie

Hello Customer! Thank you for your question and we are happy to help. The R10000 valves are available directly from our website. With any further questions or concerns, please do not hesitate to reach out to us again. Best Regards, Carrie

Hi SteveO, thank you for your question regarding RP1991! RP574 is discontinued; however, our Sister Company Brasscraft has a pressure balancing spool assembly, which is part number SLD0161. RP574 was used in shower model series 600, 900, and 1600. Please feel free to contact us directly if you have any questions or need additional assistance. Best Regards, Emma Digital Communications Specialist

Hi Valued Customer, Thank you for your question regarding our Delta Faucet RP1991. Please accept our sincere apology for the inconvenience you are experiencing. We will be happy to assist you in resolving this issue as quickly as possible. Please feel free to contact us directly for technical information at 800-345-3358. We are available Monday through Friday from 8 a.m. to 8 p.m. and Saturdays from 9 a.m. to 6 p.m. Eastern Standard Time. Thank you for being a loyal Delta Faucet customer. Best Regards, Themar Digital Communications Specialist (800) 345-3358 customerservice@deltafaucet.com