Rexnord LLC reported sales for the first quarter ended June 30, 2007, were $448.2 million, an increase of 55.2% thanks to acquisitions over the same period a year ago. Power Transmission sales were $309.8 million, up 7.4%, and Water Management sales were $138.4 million.   ; Core sales growth was 9.2% on a pro-forma basis.   ; Rexnord reported that the end markets in both Power Transmission and Water Management have held up well in the first quarter.   ; Rexnord ended the quarter with a backlog in Power Transmission of $430 million, an increase of 7% from March 2007, and 23% compared with a year ago. In the Water Management platform, Rexnord saw strength in the end-markets of commercial construction as well as civil/municipal waterworks.