Step 6 · Secure Toilet and Check for Leaks

This is the step people usually slow down on. Go finger-tight first, then a quarter turn. No rush — replay the clip whenever it helps.

Place the plastic friction washers and metal washers, followed by the nuts, onto the closet bolts. Hand-tighten the nuts first. Then, use an adjustable wrench or deep socket to slowly tighten them, alternating from the left side to the right side a half-turn at a time. This ensures even pressure and prevents cracking the toilet base. Tighten until the toilet is stable and does not rock, but do not overtighten. The porcelain can easily crack. If the bolts are too long, use a mini-hacksaw to cut them down to just above the nut. Place the decorative plastic caps over the nuts. Finally, reconnect the water supply line to the toilet tank fill valve. Turn the water shutoff valve on slowly, allowing the tank to fill. Flush the toilet 3-4 times and meticulously check around the base of the toilet for any signs of water leaks.