Delta RP19804 cartridge assembly

Monitor 1300/1400 series, single-function pressure balance.

Checked against the manufacturer

Fits: Monitor 1300/1400 series, single-function pressure balance
Used in: Shower, Tub/shower
Handles: Single
How it works: One handle sets temperature at full flow; no separate volume control. Built-in rotational limit stop (pull and turn to adjust).
Volume control: No
Held in by: Bonnet nut (under the sleeve)
Height: 4-1/8 in.
Years: until about 2006

How to recognize it

Delta Monitor 13/14 series showers. The two are not interchangeable: match the color of your old cartridge, or go by when the valve was installed. Simplified drawing, not to scale.

White body with blue legs (Delta Q&A)

Don't mix it up

Gray RP46074 is for MultiChoice R10000 valves installed after March 2006; Delta says the two are not interchangeable.
Keeps working with newer T13/T14 trim: keep the RP19804, don't use the cartridge that ships with the new trim.
Moving to 17 series trim needs a new rough-in valve.
Not for Delta 600 series push-up shower valves.
Not interchangeable with: Delta RP46074

Good to know

For valves produced before March 2006. Replacement O-rings: RP14414 (legs), RP23357 (body); Delta recommends replacing the whole cartridge. Out of stock on deltafaucet.com when checked 2026-10-29 (not marked discontinued).

Delta RP19804 vs Delta RP46074: how to tell them apart

Before you buy: pull the old part and compare it side by side. Similar-looking parts often don't swap.

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