Thank you for your question. Model B2515LF-PPU-ECO has two kits available depending on the faucet code on the back of the faucet. Use kit RP54801 if your faucet code has the "-A" suffix, and RP41701 if your faucet code is NOT followed by "-A" suffix. Both versions will use the same seat and spring, part number RP4993 which can be ordered separately. Below is a link to this part.
Best regards, Edward
Date published: 2017-10-15