Yes, but Casey did receive four calls from the A house around 2 am on July 1, 2008, all of which Casey allowed to go to voice mail (while there was texting activity on her phone indicating she was awake). She received 3 more calls from the A house around 8 am July 1 (which went to voice mail). Just after 8 am, the A house phone called Rainaldi Plumbing. Around 9:30 am, they were back to trying to get hold of Casey. Cindy wrote a check to Rainaldi Plumbing that day for $238.96.
So there was SOME plumbing problem on July 1, 2008 at the A house. George started his patio slab project on or about June 30, 2008, when he and Cindy were both on vacation. Amy said there was a time (while she was waiting to move into the A house) that Casey reported a problem with "a pipe" or air conditioning while her dad was doing something in the yard and that there were "20 people at her house" as an excuse for why Amy could not move in.
I believe Blink has suggested that Cindy's oddly detailed description of the supposed plumbing problem in the June 2010 jail letter was a message to Casey relating to the July 1, 2008 plumbing problem...which perhaps relates to Caylee somehow.