Bathtub whirlpool leaks. problem is that the tub

With the detailed part number you have, I would just walk into stores like Home Depot or any plumbing store and they will give you the exact parts you need. They are not expensive and a lot of them are standard parts and come in kits.
Good luck.

sounds like a design flaw or installation flaw. I would contact the MFg of the waterfall valve and see if they have a solution for the leak.
Silicone in something like that would be a temporary solution at best.

US PART CENTER

Remove plug fitting and reseal or someone forgot to install the rubber washer.........Silicone and replace because the water is leaking through..Hope this helps.

CALL THE MANUFACTURE,THEY WILL SEND OUT A REP.HOPE FULLY NO ONE PICKED THE TUB UP BY THE HOSE OR PUMP DURING THE INSTALLATION

If the Pump will NOT turn OFF, then the switch, must have failed, in the ON position, I suspect you will need to replace it.

Well if its not from drain then it could be from one of the supply valve (hot/cold) it is also possible that its leaking from the overflow drain. this gets overlooked sometimes because of its location. One thinks that water has to be filled that high but one might be surprised how much water gets there when taking a shower or splashing in the tub. There should be an access panel to check the valves and overflow gasket. If not remove the handles and echuns to see if you can see anything.

no there is no solutions for plugging off the jets so the water doesn't go in them. you will have to pull the tub and repair the lines. no access panel just means you have to dig in!

To my knowledge there are no closure caps for your tub; you can however purchase new jets with new seals if the tub is leaking through the jets.

here is a link to the some installation and operating instructions.
basically you need to put a 2" x 2" runner under the lip of the tub along the three sides of the tub that touch the walls to support the lip of the tub. that pretty much covers it.

that sounds like the correct dimensions. there needs to be some slack in there so the sealant can be placed around it.