It applies perfectly to the faucet without losing water from the joints. Perfect clean water without salts, chlorine, or dirt. From the very first use, I noticed a difference in my skin and hair, especially my hair, which became softer and healthier with the filter. I highly recommend it. When you apply it to the faucet, let plenty of water run. It initially released some black residue, but then it produced clean water and never released any black residue again