Given emerging technology â and a contracting economy â health plans are looking hard at whether carve-outs for pharmacy benefits, disease management, specialty pharmacy, and behavioral health care are worth the money.
1 The speed in high-grit sewage handling systems should not exceed 12 ft/sec. 2  The flow and velocity in sewage systems with low grit concentrations should not exceed 18 ft/sec.
Using 1/4 per foot allows them to carry more DFUs (Drain Fixture Units). For 2 and 1.5 pipes you should use 1/2 per foot. Note that IRC 2009 does not specify a maximum slope. Many plumbers however say that a slope of more than 3/8 per foot in a 4 or 3 pipe will cause sewer flow problems. Most people use a figure of 1/4 per foot for 4 and 3 pipes.