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Delta RP1991 Hot and Cold Faucet Stem

Delta RP1991 Hot and Cold Faucet Stem

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Restore precise hot-and-cold control to your Delta single-handle faucet with the Delta RP1991 Hot and Cold Faucet Stem. This direct replacement part carries the RP1991 stem finder…

Delta MPN RP1991
Sold Locally Only

This product isn’t sold on our website — see your local hardware store.

Typical Store Price i
Typical store price: low $37.99, average $44.99
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About Product Overview

Restore precise hot-and-cold control to your Delta single-handle faucet with the Delta RP1991 Hot and Cold Faucet Stem. This direct replacement part carries the RP1991 stem finder ID and is designed specifically for Delta fixtures that require a dual-function stem to manage both temperature and flow.

Why choose the RP1991 stem?

  • Dual-function operation ensures smooth, accurate temperature adjustment for kitchen or bathroom use.
  • Direct replacement for Delta models listing RP1991 in their Stem Finder catalog, reducing guesswork and simplifying maintenance.
  • Carded packaging supports easy storage and ready display in retail or workshop settings.
  • Durable design built to withstand frequent handle rotations and mineral buildup common in household water lines.

This stem is ideal for homeowners, landlords, and professional technicians who service Delta fixtures. It helps address temperature inconsistency, leaking handles, and sticky operation caused by worn components. By swapping in the RP1991 stem, you can extend faucet life and maintain reliable performance without replacing the entire faucet.

Installation tips

  1. Shut off the water supply to the faucet and relieve pressure.
  2. Remove the faucet handle to access the stem assembly.
  3. Remove the old stem and inspect valve seats and seals for wear (replace if necessary).
  4. Insert the Delta RP1991 stem, ensuring it sits fully seated and aligned with the cartridge.
  5. Reassemble the handle and restore water supply; test for proper hot and cold function and check for leaks.

Compatibility note: This stem is designed for Delta faucets that reference RP1991 in their replacement parts catalog. If your faucet lists RP1991, this is the correct upgrade to restore precise temperature control and smooth operation.

The Details Specifications

Brand Delta
SKU 43087
UPC 034449019910
Unit 0
Case Pack Quantity 12 per case
Retail Unit Quantity 1
Unit of Measure 0 0
Dimensions (L × W × H) 3 × 4 × 7
Weight 0 lbs
Cubic Feet 0.05199 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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