The tank broke on my toilet. It is a 13.25lpf bowl so I bought a 13.25lpf tank. Ever since I replaced the tank it will not flush properly. The level in the tank is good it just doesn’t start the swirl when you flush. It usually takes two or three flushes before everything goes down. I can’t figure it out?
Make sure there is nothing between tank and bowl connection. Take a 5 Gal. bucket of water and dump in bowl and see if it flushes ok. make sure 1/4″ tube is in the 1′ overflow tube. make sure holes in flushing rim are open. Sounds like your trap seal is not up to level are you have a partly stoppage.