(28342) Torrejón de Velasco - Carretera de Navalcarnero a Villarejo de Salvanés

At the gas station, if you spend more than 50 euros or pay 3 euros, you can do a complete water change. It's a dirty and smelly place. It has the same tap for gray water as for black water, which is extremely unpleasant. But a little Fairy will do the trick. The Pinto parking lot is better, but if it's closed for the holidays, this is the closest spot.