One of the Regional YMCA of Western Connecticut branches will be closing early on Friday.  The Greenknoll Branch of the YMCA will be closing at 7pm tomorrow.  The facility in Brookfield is typically open until 10pm on Fridays.  The closure includes the outdoor center.  The YMCA says new pumps are being installed in the wells which necessitates turning off the water.  The Greenknoll branch includes indoor and outdoor pools, a cardiovascular room, a strength training room, basketball courts and studio space.  The Regional YMCA of Western Connecticut also includes a Children's Center in downtown Bethel and Escape to the Arts in Danbury.