RP19804 Pressure Balance Shower Cartridge - For Delta Monitor 1300 1400 Series Single-Handle Tub & Shower Faucet (1993-2007)
RP19804 pressure balance shower cartridge with white and blue plastic body and two replacement O-rings.
RP19804 pressure balance shower cartridge shown next to a chrome shower faucet handle.
Comparison graphic showing RP19804 pressure balance shower cartridge compatibility with single-handle valve controls.
BlueStars RP19804 pressure balance shower cartridge for consistent water temperature control.
RP19804 pressure balance shower cartridge showing brass core, blue plastic housing, and rubber gasket details.
Step-by-step installation guide for RP19804 pressure balance shower cartridge.
RP50587 pressure balance shower cartridge replacement part for faucet repair.
RP19804 pressure balance shower cartridge with white and blue plastic body and two replacement O-rings.
RP19804 pressure balance shower cartridge shown next to a chrome shower faucet handle.
Comparison graphic showing RP19804 pressure balance shower cartridge compatibility with single-handle valve controls.
BlueStars RP19804 pressure balance shower cartridge for consistent water temperature control.
RP19804 pressure balance shower cartridge showing brass core, blue plastic housing, and rubber gasket details.
Step-by-step installation guide for RP19804 pressure balance shower cartridge.
RP50587 pressure balance shower cartridge replacement part for faucet repair.
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RP19804 Pressure Balance Shower Cartridge - For Delta Monitor 1300 1400 Series Single-Handle Tub & Shower Faucet (1993-2007)

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RP19804 Pressure Balance Shower Cartridge

Key Features

  • Maintains a balance of hot and cold water pressure.
  • Regulates water temperature to within a safe range of ±3.6° F (±1.7° C).
  • Durable plastic construction for reliable performance.
  • Designed for single-handle tub and shower faucet controls.

Replaces / Cross-Reference Part Numbers

  • Delta: RP19804

Compatibility & Fitment

  • Fits Delta 1300 and 1400 series tub and shower valves.
  • For single-handle pressure balance valves manufactured from 1993 to mid-2007.
  • Verify visual match with your existing cartridge before ordering.

When to Replace

  • Leaking or dripping from the faucet when in the off position.
  • Difficulty achieving or maintaining a consistent water temperature.
  • Reduced water flow or pressure from the shower head or spout.
  • Handle is difficult to turn or does not shut off completely.

Installation Tips

  • Shut off the main water supply to the shower before beginning work.
  • Note the orientation of the old cartridge before removal to ensure correct installation.
  • Flush the valve body by turning the water on for a few seconds to clear any debris.
  • Lightly apply a silicone-based grease to O-rings for easier installation and a better seal.
  • Secure the bonnet nut until snug, but do not over-tighten.
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  • Perfect Fit

    Perfect Fit

    Tub and Shower Valves 1300 or 1400 Series
  • 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
TEMPERATURE CONTROL

TEMPERATURE CONTROL

Designed to maintain a consistent water temperature, allowing for a safer showering experience
SIMPLE INSTALLATION

SIMPLE INSTALLATION

BlueStars Shower Cartridge Replacement is designed to be user-friendly and straightforward.
FOR A LEAK-FREE AND CAREFREE SHOWER EXPERIENCE!

FOR A LEAK-FREE AND CAREFREE SHOWER EXPERIENCE!

FAQ

This cartridge is specifically designed for Delta Monitor 1300 and 1400 series tub and shower valves manufactured between 1993 and 2007.
You likely need a replacement if you experience a dripping showerhead, difficulty turning the handle, or if the water temperature fluctuates significantly while the shower is running. These issues are often caused by mineral buildup or worn-out internal seals within the pressure balance assembly.
You will typically need a Phillips head screwdriver, a flathead screwdriver, and an adjustable wrench or strap wrench to remove the bonnet nut. It is also helpful to have a small amount of heat-proof plumber's silicone grease on hand to lubricate the new O-rings before installation.
Replacing the cartridge is a moderate DIY task that usually takes 30 to 60 minutes. The most important step is ensuring the water supply to the shower is completely shut off before you begin. If the old bonnet nut is stuck due to mineral deposits, use caution to avoid damaging the valve body.
Yes, while the cartridge is removed, inspect the inside of the valve body for any debris or heavy mineral scale. If you notice the bonnet nut is corroded or damaged, it is a good practice to replace it at the same time to ensure a proper seal.