Post-applied waterstop connection

A spliced post-applied waterstop assembly comprising, in transverse cross-section:

• a. A first pair of longitudinally spliced T-shaped waterstop strips each comprising in transverse cross-section a center web medially and perpendicularly attached to a crossweb, said center web being terminated at its free end by a bulbous enlargement, the spliced ends of said strips being inserted into
• b. a first union shell made of thin flexible resilient elastomeric material and comprising in transverse cross-section:
• (1) two parallel spaced vertical walls joined together at the top by (2) a bulbous tubular portion, each terminated at the bottom by (3) a flat horizontal wing extending away from the base of each said vertical wall, and (4) a relatively short vertical wall attached to the outer edge of each of said horizontal wings and turning downwardly therefrom, said vertical walls defining a longitudinal gap between the terminal ends thereof, said center webs and bulbous enlargements of said spliced strips being accommodated within and in sealing relationship with the inner surfaces of said spaced vertical walls and said bulbous tubular portion, respectively, of said union shell, and the terminal end surfaces of said crosswebs and the surfaces of said crosswebs attached to said center webs of said spliced strips being accommodated within and in sealing relationship with the inner surfaces of said short vertical walls and of said wings, respectively, of said first union shell;
• c. a second pair of longitudinal spliced T-shaped waterstop strips each also comprising in transverse cross-section a center web, crossweb and bulbous enlargement related as in (a) above, the surfaces of said crosswebs of said second pair of spliced strips opposite the surface attached to said center webs being in sealing relationship with the identical surfaces of the crosswebs of said first pair of spliced waterstop strips along the longitudinal extent thereof, the spliced ends of said second pair of spliced strips being inserted into
• d. a second union shell also of thin flexible resilient elastomeric material and also having in transverse cross-section spaced vertical walls, bulbous tubular portion, horizontal wings and short vertical walls as recited in (b) above, said second union shell further having in transverse cross-section two bottom horizontal walls one each running inward from and attached to a terminal end of each of said short vertical walls in a direction towards one another but stopping short of meeting so as to leave a longitudinal gap therebetween, said center webs and bulbous enlargements of said second pair of spliced strips being accommodated within and in sealing relationship with the inner surfaces of said spaced vertical walls and said bulbous tubular portion, respectively, of said second union shell, the surfaces of said crosswebs attached to said center webs of said second pair of spliced strips being accommodated within and in sealing relationship with the inner surfaces of said wings of said second union shell, and the inner surfaces of said short vertical walls of said second union shell and the inner surfaces of the bottom horizontal walls attached to the terminal ends thereof enveloping substantially and being in sealing relationship with the outer surfaces of said short vertical walls of said first union shell, and with the outer surfaces of said wings of said first union shell, respectively, the said spaced vertical walls of said first union shell having said center webs of said first pair of spliced strips inserted therein being positioned within the said longitudinal gap left between said two bottom horizontal walls of said second union shell.