I installed this faucet to replace a 50-year old not-Delta faucet. Faucet works satisfactorily. I did not replace the old flange or body at sink, and I re-used the old metal (not plastic) lift rod, strap, horizontal rod and pivot nut but am using the new stopper. Caution with Installation step 6, Flush system: without the aerator, not all water and manufacturing process debris flowed into the sink during flushing - a good volume of water/debris sprayed back inside the faucet's body and flowed down through the gasket and mounting holes of the sink into the vanity. Good thing I'd left an old towel there through installation process - helped absorb some of the unexpected back-flow. Messy! Need to improve the design, Delta.