DANCO (10347) Replacement Cartridge for Delta Monitor Single-Lever Faucets, White/Gray, 1-Pack COMPATIBILITY - Use as a generic replacement for RP19804. Fits Monitor-style faucets 1300 and 1400 series. For use in single-handle tub/shower faucets. SAVE TIME AND MONEY - Easy alternative to replacing your entire faucet. Stopping the leak can save water, energy and money. DURABLE CONSTRUCTION - Durable plastic constructions provides strength and reliability. COMPLIANT - Complies with the Reduction of Lead in Drinking Water Act (RLDWA) HOT and COLD APPLICATIONS - The replacement faucet cartridge is compatible with hot and cold water applications.