If you don't get a good answer here, I'd ask this over in the Plumbing forum. Most of us here are just other homeowners. Terry Love also runs a very good forum for plumbing help.

Here is a link that might be useful: plumbing forum

will post there, thanks

Gerber? Bottom of the barrel. Replace them with something that actually works. Toto, American Standard, Kohler. Anything with a MAP rating of 9 or above will be a huge improvement. There are plenty of 10 MAP rated toilets available as well if you want top rated.

I had Kohler toilets in my previous home and they plugged if you weren't careful to hold the lever down and let it run plenty of water whenever you used toilet paper. However, it was hard to keep guest briefed on the technique. My current home had a very old American Standard toilet when we moved in and it plugged frequently. Even on good days it took a couple flushes to clear the bowl of solids.

We finally had the plumber install a new Toto Drake toilet, and the difference in performance is like night and day. It never plugs up and there is no need to do anything special for maintenance. It was a great purchase.

Bruce

GreenDesigns: "Anything with a MAP rating of 9 or above will be a huge improvement. There are plenty of 10 MAP rated toilets available as well if you want top rated."

MAP is a nice objective test; it is a test of one criterion of toilet design; it is a very specific and limited test. In this thread, the discussion is of clogging, in particular. The MAP test measures the resistance of clogging when the load to be flushed consists solely of latex tubes (aka condoms) stuffed with a specific weight, and to a specific length and diameter, of miso paste.

The MAP test does not predict how the toilet will flush a very hard and inflexible turd (common with certain diets and certain diseases) or a long turd. It will not test "streaking" or "tracking" in the bowl, or whether, before flushing, the turd will be submerged for odor suppression. It will not test noise or time to refill.

Specifically, up to a specific value, perhaps around 6 or 7, the MAP results correlate fairly well with overall flushing ability. Above that threshold, higher MAP numbers get you absolutely nothing in the real world. A MAP 10 toilet will not necessarily flush better and more consistently than a MAP 6.5 toilet when faced with the variety of material to be flushed in real life; an excess of "extra soft," "extra fluffy" toilet paper that a specific MAP 6.5 toilet flushes might clog a MAP 10 toilet. The MAP specifications do not take overuse of toilet paper into consideration in the testing procedure.