Homeowner wanted to change faucet but couldn’t remove supply lines. Supply lines are built into stop valves. I removed the old stop valves and replaced them with new quarter turn PEX stop valves. I reattached to the faucet with new stainless steel braided supply lines. Pressurized system and tested for leaks. Expansion tank on water heater has failed. Homeowner did not want to change the expansion tank at this time. No warranty on any work due to failed expansion tank.