RP50587 Single-Handle Valve Cartridge for Delta DIAMOND Seal Technology DST Kitchen & Lavatory Faucet 36mm Models
RP50587 replacement faucet cartridge valve with gray and black plastic housing and metal stem.
RP50587 replacement cartridge valve for kitchen faucets to repair leaks and drips.
RP50587 replacement cartridge valve for Delta kitchen faucets with orange seal detail.
RP50587 replacement cartridge valve for shower temperature control with a black and gray housing.
RP50587 cartridge valve showing metal core and rust-resistant plastic housing details.
Close-up of RP50587 replacement cartridge valve for faucet repair with 5-minute installation graphic.
RP50587 replacement cartridge valve for kitchen faucets shown in a lifestyle graphic.
RP50587 replacement faucet cartridge valve with gray and black plastic housing and metal stem.
RP50587 replacement cartridge valve for kitchen faucets to repair leaks and drips.
RP50587 replacement cartridge valve for Delta kitchen faucets with orange seal detail.
RP50587 replacement cartridge valve for shower temperature control with a black and gray housing.
RP50587 cartridge valve showing metal core and rust-resistant plastic housing details.
Close-up of RP50587 replacement cartridge valve for faucet repair with 5-minute installation graphic.
RP50587 replacement cartridge valve for kitchen faucets shown in a lifestyle graphic.
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RP50587 Single-Handle Valve Cartridge for Delta DIAMOND Seal Technology DST Kitchen & Lavatory Faucet 36mm Models

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RP50587 Single-Handle Valve Cartridge

Key Features

  • Controls water volume and temperature for single-handle faucets.
  • Durable ceramic disc design provides leak-free performance.
  • Engineered for long-term use and smooth handle operation.
  • Constructed with plastic and brass components.

Replaces / Cross-Reference Part Numbers

  • Delta: RP50587

Compatibility & Fitment

  • Fits select Delta single-handle kitchen faucets.
  • Fits select Delta single-handle lavatory faucets.
  • Designed for faucet models originally equipped with the manufacturer's ceramic seal valve system.

When to Replace

  • Faucet drips from the spout after being turned off.
  • Water leaks from around the base of the faucet handle.
  • Handle is difficult to move, feels stiff, or operates with a jerky motion.
  • Inability to properly mix hot and cold water or control flow rate.

Installation Tips

  • Turn off hot and cold water supply lines before beginning installation.
  • Place a towel over the sink drain to prevent loss of small parts.
  • Observe the orientation of the old cartridge before removal to ensure correct alignment of the new part.
  • Once installed, turn the water supply on slowly and check for any leaks around the handle and spout.
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  • Perfect Fit

    Perfect Fit

    It replaces Delta Faucet Repair Kit #RP50587. Please closely verify your faucet model and product details to avoid compatibility issues
  • Premium Quality

    Premium Quality

    Made of brass and extra-durable plastic materials that withstand high temperatures and resist corrosion
  • Saving Solution

    Saving Solution

    Revive your home appliances affordably with BlueStars' DIY parts. Our savings solution turns repairs into simple, cost-effective tasks
  • Simple Installation

    Simple Installation

    BlueStars Shower Cartridge Replacement is designed to be user-friendly and straightforward
REMOVE THE OLD CARTRIDGE

REMOVE THE OLD CARTRIDGE

INSTALL NEW RP50587 CARTRIDGE VALVE

INSTALL NEW RP50587 CARTRIDGE VALVE

FAQ

This cartridge is designed for Delta single-handle kitchen and lavatory faucets featuring DIAMOND Seal Technology (DST). It is specifically compatible with models such as the Delta Victorian Pull-Down Kitchen faucet (955-DST) and various other single-handle DST configurations.
You should consider replacing the cartridge if you notice persistent leaks or drips from the faucet spout, difficulty or stiffness when operating the handle, squeaking noises during use, or inconsistent water temperature regulation.
No, this cartridge is a sealed unit and is not designed to be serviced. If the internal components fail or the valve begins to leak, the entire cartridge assembly must be replaced.
Replacing this cartridge is a straightforward task that typically takes 15 to 30 minutes. You will need an Allen wrench (often included with the replacement) to remove the handle, and an adjustable wrench to remove the bonnet nut. Always remember to shut off the water supply lines under the sink before beginning the repair.
Yes, this replacement cartridge assembly includes the RP51503 bonnet nut, ensuring you have the necessary components to secure the new cartridge into the faucet body.