Plumbing slope ball test - GIF

[Frank S]

Whenever possible avoid 90° bends in the soil line I counted 4 90s a 37.5 and a 45 a total of 432.5° of bends plus the initial vertical to horizontal transition. The system could have been made using 45s where the 90s were by cutting just a little more concrete. Reducing the total degree if bend count by 180° Good plumbing practice whether drain and waste or potable water the fewer bends the better. I like to associate it with running electrical conduit. Which allows a maximum of 360°s worth of bends in any run of conduit.