Explore the brewery and restore pressure to the taps is a mission in Daxter. Osmo got a call from the brewery about "some sort of mechanical problem" and sent Daxter to fix it. Once Daxter arrived to the bar, the Barmaid explained that she lost pressure at the taps and that he needs to reset the valves.
The new pressure boost attachment takes an important role in this mission and most of those onward. Be prepared to hover for prolonged times by picking up gas in mid-air to refill your spray pack. You also gain an extra mechanic involving open flames: use the spray gun at one of these light sources to turn it into a flamethrower and burn enemies or cobwebs blocking doorways and gain extra heights when hovering.
As soon as you go downstairs you will run into a new enemy, the metal creeper. These spider-like bugs are quite agile and have both melee and ranged attacks. The brewery area itself is incredibly linear, with small rooms connected to more rooms by narrow hallways. Be prepared to dodge hot steam from leaking pipes that periodically block your way. Halfway through you will run into another new enemy known as the slasher; these bugs are among the most powerful and take several hits to kill and deal double damage compared to other bugs.
Several more slashers appear from here on. A couple of the floor gratings will give way, forcing you to hover across the gaps in a timely fashion, as you often also need to dodge steam. Eventually, after numerous slashers and bottomless pits, you reach the end of the area and your real objective. In front of you will be eight meters that correspond to your D-pad and face buttons, much like the Metal Head Mash minigame from Jak II. Hit each button corresponding to each meter in time until the pressure restores itself.