disconnect the plug at the pump. remove the tube/s from the pump. they may be tight so have a good tug. try using pliers. if you feel you have plenty of slack on tube cut above the nozzle of the old pump. only do this if there is plenty of slack.remove the pump making sure that you dont accidently remove the rubber seal on the bottle. any remaining water in the bottle will come out.compare new and old pump and make sure both are exactly the same.then fit new pump which is the reverse of the removal of old pump. it may take a few attempts to fit the tube to the new pump especially if you have cut a bit of the end. so use some spit and elbow grease . good luck
shaffick
January 2009