I have an american standard jet tub, but i lost

Check the owner's manual or Google for filter location. Check the intake in the tub for a screen that might be clogged.

Not normal for that to happen but the jet faces on the two back jets may be turned off or down.
Try turning the face of the jet clockwise and see if you get more water flow out of each jet.

Rod
US Parts Center

The problem you are experiencing is common to many jetted bathtubs.It is a result of dried bathing water in the tub. There are a couple of solutions to resolve this ongoing problem.

1. Use your tub more frequently as the water will not have time to fester in the pipes.
2. Use a cleaning solution made for cleaning the pipes on jetted bathtubs once every three months.

You find Cleaning and Maintenance Products for jetted tubs at the following website. US Parts Center


Rod
US Parts Center
888-521-6183

Hello:

Please contact us at American Standard, and will be glad to assist you.

-Paul, Brand Marketing
on behalf of American Standard Brands

1-800-442-1902
Monday through Friday
8:00 A.M. to 7:30 P.M. EST

Technical Customer Service
Monday through Friday
8:00 A.M. to 6:00 P.M. EST
8:00 A.M. to 3:00 P.M. EST Saturday

sounds like maybe the jet faces are turned off. see if they turn one way or the other and they may open and spew water out for you.

The water in the tub needs to be higher than the jets!

Are they white flakes? Sounds like you have lime deposits turning loose in the plumbing.

Was the unit purchased and installed new? Maybe the privious owner had a hard water problem.

In either case, you may have to invest in a water softener.

HTH,

Mike...

is this a new install? if so you may need to adjust the air intake. Or if you have kids they may have messed with the settings. If the air is closed all the way off....no bubbles.

Jet trim usually unthread counter clockwise out of the wall fitting