The current design is "a steel cap, and underneath it is the internal plug and on top of that is a piston and the flow tube in the middle, and coming down the left side is the warm water inlet tube," says Caldart. "I made that sketch on May 25th."
Caldart, who first started plumbing as a teenager, says he originally sent BP three sketches depicting a flange and plug design similar to those used in high-pressure hotel plumbing on May 25th. At that point, he says he was told by BP that they were not working on stopping the leak, but simply capturing the oil.
After being told his ideas were under technical review, Caldart tweeted on June 14th, "just got an email from horizon [incident response] saying a similar plan to mine is being implemented, but thanks anyway........ yeah right."
Last week, BP spokesmen contacted by the Monitor said they did not know whether the then-unknown plumber's designs made it into the final cap design, but noted that it was likely the work was already underway.
On the other hand, BP spokesman Mark Salt noted, "I'm sure we've used bits and pieces of suggestions [from the outside] and have picked things out that could be used going forward."
In mid-June, feeling he had gotten the brush-off from BP and seeing the situation in the Gulf getting worse, Caldart started emailing his design to "everybody I could think of," including, he says, Dr. Bea at Berkeley. He started going anonymous because the "Joe the Plumber" moniker seemed to make it easier for people to dismiss his idea. (He says a reference on his Twitter and Facebook accounts to a presidential run in 2012 is a joke.)