Model # RP1991

Internet #202985492

Delta Stem Unit


Stem Unit

$2555 /each
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Frequently Bought Together

Product Overview

Our faucets and their parts are guaranteed for a lifetime, but just in case you'd like to make some repairs on your own we've made this Stem Unit available for you to order. As part of a company that delivers water every day through millions of faucets worldwide, Delta provides a lifetime limited warranty on all parts to the original consumer. Delta is committed to providing you the best experience with water. Another way that Delta is more than just a faucet.

California residents: see   Proposition 65 information

  • For use with Delta 1600 series tub/shower faucets
  • Genuine Delta repair part
  • Guaranteed not to tarnish or corrode
  • Lifetime limited warranty covers parts and finish defects

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

What makes this stem pull the rubber pieces out? My rubber pieces get stuck in the stem.

Asked by: Racerx
I had the same problem and I put a little dab of plumbers grease on the rubber pieces where they rub the stem.
Answered by: Notaplumber
Date published: 2017-05-23

need installation instructions

need installation instructions
Asked by: rat
Hi, Rat! Thank you for your question. First, please make sure that the water supplies are turned off to the valve. Remove the handle by removing the Phillips head screw on the front. If you have a clear knob handle, pry the cap off to get to the screw. Unscrew the bonnet nut. You should then be able to pull out the stem unit. You can scoop out the seats and springs using a pencil or Allen wrench. Best Regards, Rosanna
Answered by: DeltaFaucet
Date published: 2017-03-18

Does this part fit Delta # 1646 T&S valve?

Does this part fit Delta # 1646 T&S valve?
Asked by: ralph7
Hi ralph7, Thank you for your question. This is the correct stem for the 1646 or any 1600 series tub and shower faucet. Best regards, Jon
Answered by: DeltaFaucet
Date published: 2017-02-27

Without comparing side by side it' hard to tell if this is identical to my cartridge. Does this fit older delex models?

Asked by: Lookalike
Dear Lookalike, Thank you for your question. The Delta stem unit RP1991 is the internal part for a Delta older 1600 series shower or tub/shower faucet. Best regards, Tanya
Answered by: DeltaFaucet
Date published: 2017-05-23
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Customer Reviews

Stem Unit is rated 4.9 out of 5 by 7.
Rated 4 out of 5 by from Easy to install. worked good Easy to install. worked good
Date published: 2017-03-31
Rated 5 out of 5 by from The stem fixed the leak.... The stem fixed the leak.
Date published: 2017-07-11
Rated 5 out of 5 by from Not a Chinese knockoff This is an original, quality Delta part. It will last. I tried a Chinese knockoff and it leaked after about 2-1/2 years. Never again!
Date published: 2016-01-26
Rated 5 out of 5 by from Product appeared to be fine. Part was returned for full refund as it was not needed. Fixed leak with two small seals bought at HD for $3. Thanks!
Date published: 2014-05-06
Rated 5 out of 5 by from product worked as desribed My home was built in 1977. I was worried I could not find the part I needed. The part performed flawlessly.
Date published: 2013-12-12
Rated 5 out of 5 by from Simple to install. Fixed leak. Easy to install. Fixed leaking shower head. Satisfied.
Date published: 2014-05-27
Rated 5 out of 5 by from Easy fix Easy to install ... worked just fine .. no more leaks!!
Date published: 2013-12-24
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