Slow Flushing Toilet?

[Kawiski]

Ever since we moved into this 2-story ranch house with own water well, the upstairs toilet would always flush very slowly. It never over flows or anything. Eventually all goes down but very slowly... The 2 other toilets on the 1st floor flush just fine.

I thought it was clogged and, pumped the plunger, used chemicals like DRAINO, etc but no help. Then, I snaked it but still no help. Finally, I removed the toilet and inspected the trap and passage but no fault found. And I snaked it (25') again... But still no help when reinstalled the toilet and flushed.

Someone told me to replace the toilet with a newer style, and it may do the magic. I think the slow flushing toilet is the original when the house was built, 1982. Maybe it was always like that all the time, who knows.

Any idea what to try?

[havasu]

Before buying a new toilet, I would check to see if the waste vent line was free of debris.

[majakdragon]

I agree. It sounds like a vent problem. If the vent pipe (the pipe you see sticking out of the roof) is clogged, or worse, non-existent, the drainage piping will not get the air it needs to operate properly.

[Kawiski]

Clogged vent tube...
That makes a perfect sense even though I thought about it. I haven't checked it yet because the roof is steeply angled and I'm afraid of height. Well, I will get some tall ladder and check it out.

Thanks!