I managed to break off the elbow connecting one of my batteries to the breather tube. Removing the broken part of the elbow was easy but I was not sure where to get a replacement part. Then I had a bright idea - why not use the same size (almost) elbow used in windscreen washer circuits. Now i know why not, I found a small puddle of blue goo on the bottom of the battery box and a small section of the blue elbow still attached to the breather pipe, which was also lying in the floor of the battery box. The problem is that the windscreen washer parts are not suitable for carrying acids. Car part shop - no luck locally. Internet - no luck there so far but I do not really know what words to use for a Google search. So where do I get a replacement elbow?