fixedly hold the members 18 and 20 within the body 12 the flanges 42 and 52 serve in combination with the projections 56 and 58 to also hold the members 18 and 20 within the body 12 the members 18 and 20 are formed of a suitable thermoplastic material which is rigid such as abs polymer commonly used in the plumbing industry and acceptable with regard to standardized plumbing codes alternately other material could be used for the members 18 and 20 such as metals including aluminum or steel the materials for the members 18 and 20 simply must adhere to the requirement that they be rigid enough to either be attached to a supporting surface or have a fixture such as a pipe elbow attached to them once formed the members 18 and 20 are positioned within a mold in an injection molding machine and a suitable semi resilient material is injected into the mold and allowed to set up or form into the body 12 the exact mechanism in setting up in the body 12 will of course depend upon the materials used for body 12 thus a thermoplastic rubber material will be injected in a fluid state into the mold and allowed to cool into the body 12 other materials such as urethane elastomers could be utilized which would be injected into the mold and chemically allowed to polymerize to form the body 12 in any event the fluid form of the body 12 flows into the mold and around the mounting portions 38 and 48 of the members 18 and 20 upon setting up the material for the body 12 forms a.