Bathing installation fitting and grommet assembly

1. A fitting assembly for installation in an opening in a tub shell wall of a bathing installation tub having an interior surface, a back surface and an edge defining the opening, the assembly comprising:

a grommet formed of a resilient material and having a wall portion sized to be inserted into the shell wall opening and a flange portion extending from the wall portion and configured to overlay a portion of the tub shell about the opening, the grommet having an interior peripheral recess defined in the wall portion, the recess having a recess cross-sectional configuration, the recess spaced away from the flange portion by a sufficient distance that, when the grommet is inserted into the opening and the flange portion seated against the tub wall, the recess is at a position beyond the back surface of the tub shell;

a bathing installation fitting including a fitting body having a peripheral wall portion and a body flange portion extending outwardly from the wall portion, the peripheral wall surface having a protruding peripheral external rib about an exterior surface of the peripheral wall surface, the rib having a rib cross-sectional configuration complimentary to the recess cross-sectional configuration, the rib positioned on the fitting body so that when the fitting body is inserted into the grommet, the peripheral rib is received into the peripheral recess on the grommet;

the grommet and fitting configured such that the recess of the grommet and the fitting body rib are positioned below the back surface of the shell wall when installed in the opening, and the periphery of the grommet is compressed by the edge of the shell opening and pushed outwardly by the rib to form a protrusion area increasing a dimension of the grommet below the back surface of the shell to lock the fitting into the shell opening, the grommet forming a water seal against the tub shell wall such that the fitting assembly does not leak water when installed in the opening and the protrusion area locks the fitting assembly within the shell opening.

2. The assembly of claim 1 , wherein the grommet is fabricated of EPDM.

3. The assembly of claim 1 , wherein the fitting and grommet are configured for installation in a spa or whirlpool bath.

4. The assembly of claim 1 , wherein the fitting is one of a water jet, a control panel, an air jet, a switch button, an audio speaker or a suction fitting.

5. The assembly of claim 4 , wherein the grommet and the fitting each has a circular outer peripheral configuration.

6. A fitting assembly for installation in an opening in the tub shell wall of a bathing installation tub having an interior surface, a back surface and an edge defining the opening, the assembly comprising:

a grommet formed of a resilient material and having a wall portion sized to be inserted into the shell wall opening and a flange portion extending from the wall portion and configured to overlay a portion of the tub shell about the opening, the grommet having an interior peripheral recess defined in the wall portion, the recess having a flat surface on a top generally parallel to the flange portion and an inwardly tapered surface below the flat surface, the recess spaced away from the flange portion that, when the grommet is inserted into the opening and the flange seated against the tub wall, the recess is at a position beyond the back surface of the tub shell;

a bathing installation fitting including a fitting body having a peripheral wall portion and a body flange portion extending outwardly from the wall portion, the peripheral wall surface having a protruding peripheral external rib about an exterior surface of the peripheral wall surface, the rib having a flat top portion extending generally parallel to the body flange portion and a tapered portion extending below the flat portion, the rib positioned on the fitting body so that when the fitting body is inserted into the grommet, the peripheral rib is received into the peripheral recess on the grommet;

the grommet and fitting configured such that the recess of the grommet and the fitting body rib are positioned below the back surface of the shell wall when installed in the opening, and the periphery of the grommet is compressed by the edge of the shell opening and an unrestrained region of the grommet beneath the shell wall is pushed outwardly by the rib to form a protrusion area increasing a dimension of the grommet below the back surface of the shell to lock the fitting within the shell opening, the grommet forming a water seal against the tub shell wall such that the fitting assembly does not leak water when installed in the opening and the protrusion area locks the fitting assembly within the shell opening.

7. The assembly of claim 6 , wherein the fitting is one of a water jet, a control panel, an air jet, a switch button, an audio speaker or a suction fitting.

8. The assembly of claim 6 , wherein the grommet and the fitting each has a circular outer peripheral configuration.

9. The assembly of claim 6 , wherein the grommet is fabricated of EPDM.

10. The assembly of claim 6 , wherein the fitting and grommet are configured for installation in a spa or whirlpool bath.

11. A fitting assembly for installation in an opening in a tub shell wall of a bathing installation tub having an interior surface, a back surface and an edge defining the opening, the assembly comprising:

a grommet formed of a resilient material and having a wall portion sized to be inserted into the shell wall opening and a flange portion extending from the wall portion and configured to overlay a portion of the tub shell about the opening, the grommet having an interior peripheral grommet feature defined in the wall portion with a cross-sectional grommet feature configuration, the grommet feature spaced away from the flange portion by a sufficient distance that, when the grommet is inserted into the opening and the flange portion seated against the tub wall, the grommet feature is at a position beyond the back surface of the tub shell;

a bathing installation fitting including a fitting body having a peripheral wall portion and a body flange portion extending outwardly from the wall portion, the peripheral wall surface having a peripheral body feature on an exterior surface of the peripheral wall surface, the body feature having a body feature cross-sectional configuration complimentary to the grommet feature cross-sectional configuration and positioned on the fitting body so that when the fitting body is inserted into the grommet, the grommet feature and the body feature are engaged;

the grommet and fitting configured such that the grommet feature and the fitting body feature are positioned below the back surface of the shell wall when installed in the opening, and the periphery of the grommet is compressed by the edge of the shell opening and the engagement of the body and grommet features form a protrusion area increasing a dimension of the grommet below the back surface of the shell to lock the fitting into the shell opening, the grommet forming a water seal against the tub shell wall such that the fitting assembly does not leak water when installed in the opening and the protrusion area locks the fitting assembly within the shell opening.

12. The assembly of claim 11 , wherein the fitting is one of a water jet, a control panel, an air jet, a switch button, an audio speaker or a suction fitting.

13. The assembly of claim 11 , wherein the grommet and the fitting each has a circular outer peripheral configuration.

14. The assembly of claim 11 , wherein the grommet feature is a recess, and the fitting body feature is a projection.

15. The assembly of claim 11 , wherein the grommet feature is a projection, and the fitting body feature is a recess.

16. The assembly of claim 11 , wherein the fitting and grommet are configured for installation in a spa or whirlpool bath.