ok, i've got a problem. i made one of these out of 1" pipe, it looks just like the one in the first pic, except that i had to use the 90* elbow at the intake on the tee so i could hook up my sump. the inner U bend is higher than the outer one and it is overflowing into the sump, there is about a 2" difference in hieght between the inside and outside U bends. my problem is that the overflow cannot keep up with my QU2200 pump @ 3.5ft head and it will not restart when i unplug the pump. i have my pump throttled back about 25% to keep it from overrunning the overflow. wtfup?