COMPLETE FLEXIBILITY: Delta's MultiChoice Universal Valve gives you flexibility to upgrade your shower trim without altering plumbing. It is compatible with most Delta single-function, dual-function, or dual-function thermostatic trim kits CONNECTION TYPES: Hot and cold inlets machined for PEX cold expansion connections with memory fitting do not require the use of torch, chemicals, or solvents for installation and resist corrosion, pitting, and scaling. Screwdriver stops are included VALVE BODY ONLY: Valve body only, required cartridge is included with your Delta shower trim of choice BACK-TO-BACK CAPABILITIES: Back-to-back installation capability for multi-unit buildings LIFETIME LIMITED WARRANTY: You can install with confidence, knowing Delta's MultiChoice Universal Valve is backed by Delta Faucet's Lifetime Limited Warranty