tubs and other basins more specifically u s patent application publication nos 2007 0039098 filed aug 19 2005 and 2008 0047060 filed aug 22 2006 and u s provisional patent application ser no 61 089 692 filed aug 18 2008 furthermore u s pat no 5 745 931 filed feb 9 1996 u s pat no 5 758 368 filed may 21 1997 u s pat no 6 148 454 filed mar 4 1999 u s pat no 6 154 898 filed may 19 1999 u s pat no 6 317 906 filed mar 10 1998 u s pat no 6 173 459 filed may 26 1999 u s pat no 6 226 806 filed aug 2 2000 u s pat no 6 640 358 filed feb 6 2001 u s pat no 6 418 570 filed apr 4 2001 u s pat no 6 546 573 filed jul 17 2002 u s pat no 6 681 420 filed dec 3 2002 u s pat no 6 675 407 filed nov 8 2002 u s pat no 7 451 502 filed aug 23 2005 and u s pat no 7 503 083 filed aug 23 2005 are also related to the inventions described herein the entire disclosures of each of the prior art references listed above are incorporated by reference herein this application is also related to u s patent application publication no 2008 0196161 filed apr 10 2008 which is related to a flexible waste water pipe the entire disclosure of which is incorporated by reference herein while various embodiments of the.