RP19804 Shower Cartridge Assembly – Replacement For Delta 1300/1400 Series Monitor Valves (1993-2007), Pressure Balance, Brass & Plastic

About This Product

If your Delta shower valve is leaking, stuck, or giving you temperature surprises, this RP19804 cartridge is likely the fix.

It's specifically designed for Delta 1300 and 1400 series single-handle tub/shower valves made between 1993 and 2007 – not for the newer MultiChoice valves (post-2007).

The pressure balance design keeps water temperature within ±3.
6°F (±2°C), so you don't get scalded or frozen when someone flushes a toilet.

Made from quality brass and plastic – durable and corrosion-resistant.
Installation is DIY-friendly: shut off water, remove the handle and bonnet, pull the old cartridge, clean out any debris, pop this one in, and reassemble.

No special tools required – pliers might help with the bonnet.

Kit includes the cartridge, two handles, and three black washers.
If you've got a 225Nt welder variant, double-check which rheostat version you need – but for the valve, this is the one.
Restores smooth, safe shower performance without replacing the whole faucet.