Delta RP19804
Replace the Delta RP19804 cartridge in a Monitor 1300 or 1400 shower
RP19804 is the cartridge Delta lists for Monitor 1300/1400 Series tub and shower valves produced before March 2006. It has a white cap and a shorter, usually blue, lower housing. It does not fit the newer MultiChoice valve, which takes RP46074.
- FitsMonitor 1300/1400 Series valves
- Made for valvesbefore March 2006
- Height x width4-1/8 x 1.92 in (Delta)
- Not interchangeable withRP46074
Is it an RP19804?
With the handle and sleeve off, you will see a brass stem with a rotational limit stop on it, a brass stop, and a raised stop on the cap marked "hot side". Under the sleeve is a brass bonnet that unscrews. That is the Monitor 1300/1400 layout.
- Cap
- White. The newer RP46074 has a gray cap.
- Lower housing
- Shorter than RP46074, blue on cartridges shipped from July 2006, blue or off-white on earlier ones. Delta staff describe it as having shorter legs with no open space between housing and legs.
- Valve age
- Valves produced before March 2006, plus some 1300/1400 valves shipped from July 2006 before the MultiChoice change. Delta's reference sheet lists RP19804 for both.
Delta staff say RP19804 does not fit the older Delta 600 Series shower units.
Using newer Delta trim on an older valve
Delta staff say any T13 or T14 Series trim kit will fit a 1300/1400 valve, but you keep the RP19804 cartridge, not the one packed with the trim. A 17 Series trim with separate volume control needs a different valve body, which means opening the wall.
Delta's staff answers list the leg O-rings as RP14414 and the larger body O-ring as RP23357, but they recommend replacing the whole cartridge rather than individual O-rings.
| Item | Part | Number |
|---|---|---|
| 1 | Brass stem | part of RP19804 |
| 2 | Rotational limit stop (RLS), pulls off the stem | part of RP19804 |
| 3 | White cap with raised stop marked "hot side" | part of RP19804 |
| 4 | Shorter blue lower housing, seats and springs at its base | part of RP19804 |
| 5 | Inlet legs and O-rings | O-rings RP14414 |
Complete cartridge: RP19804. Body O-ring RP23357.
Tools and supplies
- Screwdriver or Allen wrench for the handle
- Adjustable wrench or slip-joint pliers for the brass bonnet
- Pen or pencil to mark the limit stop
- Kitchen or candy thermometer and a plastic tumbler
- Towel to cover the tub drain
- Flashlight
Replace the RP19804, then set the limit stop
Close the water to the shower
Look for stop valves behind the trim or behind an access panel on the other side of the wall. If the shower has none, close the house main shutoff. Open the shower handle and let it run until it stops: if water keeps flowing after a minute, the shutoff is not holding.
Safety: Leave the shower handle open while you work so pressure cannot build behind the cartridge.
Remove the handle
Take the handle off the stem. Put a towel in the tub to catch screws.
Mark the rotational limit stop
Delta's first caution: with a pen or pencil, mark the rib on the rotational limit stop that lines up with the groove on the brass stop. The new cartridge's limit stop goes back in the same position if the old one gave the right handle travel.
Pull off the limit stop and note "hot side"
Pull the limit stop off the stem. Note which side the raised stop marked "hot side" is on. It belongs on the hot inlet side, normally the left, so cold flows first.
Pull off the sleeve
Slide the outside sleeve off. If the sleeve O-ring is in the way, slide it toward you only until it stops at the raised brass section; Delta says not to pull it over that section.
Confirm the water is off, then unscrew the brass bonnet
Turn the stem to on and check that nothing flows. Unscrew the brass bonnet.
Safety: If the bonnet will not move and the valve body twists, stop and call a plumber.
Lift out the old cartridge
Put the handle on the brass stem and rotate it counterclockwise while lifting the cartridge out of the two notches in the sides of the body. Do not pry it out with a screwdriver.
Check it before you discard it
Delta's test: shake the cartridge hard. A rattle means the pressure-balance spool moves and it can go back in. No rattle means replace the cartridge. Never take the lower housing apart, and do not twist the cap and lower housing of the new cartridge apart.
Install the new cartridge with the raised stop on the hot side
Set the new cartridge into the body notches with the raised stop on the cap toward the hot supply. Thread on the brass bonnet, then slide the sleeve back on. Remove and discard the black retention plug from the top of the new cartridge's stem.
Position the brass stop and the limit stop
With the limit stop off: if the raised stop is on the left, rotate the brass stop to the bottom left so it sits below the raised stop. If the raised stop is on the right, rotate the brass stop to the top right, above it. Push the limit stop back on at your pencil mark. Its first position, at the maximum counterclockwise setting, restricts the handle the most.
Flush the valve
Put the handle to full mix, open the water supply and check for leaks. Let it run one minute through the spout without moving the handle, then divert to the showerhead for 30 seconds. Cold water must flow first; if it does not, the cartridge is reversed (step 4).
Set the maximum temperature with a thermometer
Run until the cold is as cold and the hot as hot as they will get. Turn the handle fully counterclockwise to its hottest. Hold a thermometer in a plastic tumbler in the stream. Delta's limit is 120°F, or 110°F where local code requires it; 90–110°F is a comfortable shower.
If it reads too hot, pull the limit stop and refit it one tooth counterclockwise for each 6°F or so you need to drop. This is the opposite direction from the newer RP46074. Test again after each change.
Safety: Check the temperature at full hot before anyone showers, especially a child or an older adult: CPSC says 120°F water can cause third-degree burns in about five minutes, and hotter water in seconds.
Reinstall the handle and check again tomorrow
Fit the handle. After 24 hours, check the spout, showerhead and escutcheon for drips or dampness. Recheck the maximum temperature when supply water gets colder in winter.
Stop and call a plumber if
- The stop valve or main shutoff will not close fully, or it leaks at its stem when you turn it.
- The bonnet nut or brass bonnet will not turn by hand or with gentle wrench pressure, or the valve body threads look cracked or corroded.
- The old cartridge will not lift out after you rotate it with the handle. Delta says not to pry it out with a screwdriver.
- Water runs from inside the wall, from behind the escutcheon after reassembly, or the wall or tile around the valve is soft or stained.
- You cannot get the outlet temperature at the hottest handle position down to 120°F with the limit stop, or the temperature swings even with a new cartridge.
- The valve body is not a Delta 1300/1400 or MultiChoice R10000 type body. Replacing a valve body means opening the wall and is plumber work.
Troubleshooting by symptom
| What you see | Likely cause and fix |
|---|---|
| Shower drips after shutoff | Worn seats and springs or a worn cartridge. Delta recommends replacing the complete RP19804. |
| Hot comes out first | Raised stop is on the cold side. Re-seat the cartridge with "hot side" toward the hot supply. |
| Temperature changes when someone flushes | The pressure-balance spool is stuck. Shake test the cartridge; no rattle means replace it. |
| Handle hardly turns after the swap | The limit stop is on its first position, which allows almost no rotation. Move it a tooth at a time and recheck with a thermometer. |
| New T13 or T14 trim and now the shower will not work | The trim kit's newer cartridge was fitted to the old valve. Use RP19804 in a 1300/1400 valve. |
Official parts and warranty
Delta warrants faucet parts to the original consumer purchaser for as long as they own the home the faucet was first installed in, and replaces defective parts free of charge; labor is not covered. Delta's number is 1-800-345-DELTA (3358).