Hello, I have a medium size commercial building with 3 toilets in each washroom. Each washroom has a pressure assisted toilet in the wheelchair stall which are faily new i think and a household toilet in the other stalls. The household toilets are very old and seem to flow slowly. I have changed the internal guts of these toilets with Home depot replacement parts and the line was snaked by a plumber, but now he said best thing to do is change the toilets. He is recommending $600 pressure assisted toilets but i am wondering if the code allows for me to just install a good grade commercial toilet which is about $200 only. We are in Ontario by the way.
If you want to install "tankless" toilets your incoming water line has to provide enough volume quickly. I think the minimum pipe size is 1-1/4 inches.
Snaking a drain line does not always restore the full diameter. Problems with toilets not flushing usually have to do with a partial blockage, either in the toilet itself or in the drain pipe. I don't think you have to get a commercial toilet unless the usage is so frequent that flush handles and flappers and floats wear out quickly.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.