Manifold arrangement

A filtration system comprising:

• a first filtration module including a first fluid communication opening and a first header having a first removable end cap engaged with an upper end of the first header and a first filtration cartridge having an end disposed in a lower end of the first header;
• a second filtration module including a second fluid communication opening and a second header having a second removable end cap engaged with an upper end of the second header and a second filtration cartridge having an end disposed in a lower end of the second header;
• a first common fluid transfer manifold in fluid communication with the first fluid communication opening and the second fluid communication opening positioned between the first filtration module and the second filtration module;
• a second common fluid transfer manifold in fluid communication with the first and second filtration modules and disposed between and below the first and second filtration modules;
• an aeration control mechanism disposed within the second common fluid transfer manifold and including:
• a first conduit including a first aeration control aperture defined in a wall of the first conduit and in fluid communication with a lower end of the first filtration module;
• and
• a second conduit including a second aeration control aperture defined in a wall of the second conduit and in fluid communication with a lower end of the second filtration module.