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Tighten the Bolts and Reconnect the Water
With the bowl set down straight, it is time to tighten it down to the floor. Using a crescent wrench or channel locks tighten the nuts on to the closet bolts. It is important to do this slowly and carefully, tightening each side evenly. Over tightening can crack the bowl, which is obviously a costly replacement. To make sure the bowl is down tight, place your arms around it and try to rock it side-to-side and back-to-back. If it moves, continue tightening the nuts, still alternating sides. Once the bowl is down tight you are ready to reconnect the water supply. The supply line only has to be hand tight. With the line hooked up, turn the water back on and flush the toilet a few times, checking for leaks around the bowl and on the supply line.