Please help...

I have a rex valve flushometer and its leaking from the cover. The flushometer is only 1 year old, what would cause this problem and is it a big concern? I have heard horror stories from other people where the cover blew-off and the entire apartment became flooded with water... please help. Thank you.

How familiar are you with repairing plumbing fixtures? Here a diagram, back to you. http://www.bestplumbingonline.com/specs/pic/pdf/delany_fl_02.pdf

Video: How to Repair a Flushometer Toilet | eHow.com (http://www.ehow.com/video_8261120_repair-flushometer-toilet.html?wa%5Fvrid=be20f633%2D6f10%2D4ccd%2Da8e 5%2D5315dd460a7f&wa%5Fvlsrc=during%2Dplate)