Thank you for your question. Delta Faucet part # RP1740 should not be taken apart. If you are experiencing an issue with this part, please contact our Home Ownder/Warranty line at 800-345-3358 for assistance.
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HOW TO INSTALL SPRING AND SEAT WITH RP1740
about Stem Unit Assembly on
May 15, 2012
How to install spring and seat with delta part RP1740
Thank you for your question. This stem unit is not used in all Delta two-handle models, but it is used in quite a few. The best course of action to follow in order to find out exactly what part you need is to identify what stem unit you currently have. You can receive assistance with this process from the plumbing department at your local Home Depot store. You can also contact the Delta consumer line at 1-800-345-3358.