English to Spanish Tech/Engineering Engineering (general) Fontanería

Sacado de una novela, "El Turista Accidental". Dice así:
"I turned off the water under the sink so that the water from the faucet won´t whoosh over. Now, the leak is here, in the handle, so you want the handle apart and replace the PACKING. First, you unscrew the top screw, then you put in the new packing for the handle and put the faucet back together"