Your toilet can make some noise each time you wash, otherwise a suction sound indicates a problem, either with a blockage in the drain pipe or an obstruction or damage to the toilet ventilation tube. As the owner, you have the ability to take care of the simple problems that can make the sucking sound. You may find, however, that the problem requires the experience of a plumber.
KOHLER K-4325-L-0 Kingston(TM) Wall-Mounted 1.6 or 1.28 GPF Flushometer Valve Toilet Bowl with Top Inlet and Bedpan Lugs, Without Seat, White White
clogs
A partial clog in the toilet drain line can result in the toilet making a sucking sound each time it is discharged. The clogging in the toilet drain line traps the air behind it, which leads to strange sounds, and even bubbles going up the toilet drain and into the container. If sinking the toilet does not dislodge the clogging of the drain pipe, turn to an endless closet for help. The auger's flexible line is fed through the drain line that curves the toilet bowl and pushes the blockage, or the hook at the end of the auger catches the clog and pulls it out of the leak.
Inadequate ventilation
Your toilet's drain line connects to a vent pipe, which performs a dual function. The ventilation pipe extends vertically up through the roof of the house, where fresh air is introduced into the old pipe as the air in the lava tubes down with the waste water. The vent pipe also transports the sewer gases into the pipes safely away from the house. A problem such as an obstruction in the ventilation tube leads to inadequate ventilation and suction sounds when the water is washed down the drain. Water demolition of the roof vent pipe, using its hose, should dislodge most of the obstructions in the vent pipes. A flashlight should allow you to see if there are blockages in the vent pipe, and see any progress you make in removing an obstruction.
Vent pipe damage
While you are throwing water down the vent pipe, have someone or several people in the house looking at the walls and ceilings to detect any signs of water leaks. If they detect any leak, they tell you immediately so you can stop shooting the water through the vent pipe. A leak indicates the ventilation pipe has a damage that affects the correct operation of the pipe.
Professional Help
If you see a nuisance and can not be removed, a professional plumber can help. The plumber has tools that reach the ventilation pipes and either push the obstructions out of the way or remove them. A plumber can also help if there are no problems with the vent pipe and yet the suction sounds continue. Plumbers have a machine that creates false smoke, which allows them to see where the obstructions or breaks in the vent pipe are located.