I just finished my automatic watering system and have had a few problems. Wondering if anyone else has experienced the same. I set up an automatic waterer with and old waterer for my horses. I have 20' of 1-1/2" PVC pipe in a basic ell shaped. I got the push in 360 degree stainless nipples from QC supply -- 20 of them. After drilling the holes 11/32 as specified and put in the rubber gromets, I had to push in the nipples ( which was a feat). They were extremely hard to push into the gromet hole. Then after I set everything up all but 3 nipples leaked like ALOT. Now I have to pull them alll out and order the screw in type nipples. Has anyone had problems with the push in nipples? Has any used the screw in type and are they any good? I thought I was getting off pretty good since i spent about $80 on the whole system, but now I'll have to order replacement nipples. But I do love my chickens. I've 50 -- buff minorcas, ameraucanas, anconas, NHR, RIR, white leghorns, star, black sex link and plymouth rock. ---- So if anyone is thinking of the push in nipples be cautious. I wonder if I messed up on the insertion, but I can't see how. Thanks for all the helpful hints. I ordered more nipples already (the threaded type), will let you all know how things turn out.