last night while sitting in the tub i turned the valve that controls this jet(shuts all others off) its got so much flow it like fighting rapids. the thing i don't understand is its location. its on the side of the filter housing were theres nowhere to sit with your back against it. best you can do is get your ribcage worked over! it makes a giant whirlpool that flows counter clockwise in the tub. anyone know what function this serves? i was just looking online. i think its the hydro air swim jet(1" nozzle). but why so forceful in a 7ft tub?

That, is what is called a whirlpool jet.

Just another thingy they put in some tubs.

LOL yeah, I have always wondered why they call those "whirlpool" jets... <grin>