Double ell

 This double ell has a custom threaded inspection cap (white pvc) that is screwed in after a port is drilled in the ell.  This allows checking to verify that the greywater flow is splitting into two equal parts. The splitter needs to be perfectly level, ideally supported by a brick or rock.  To ensure an even split the pipe coming in should be straight for 2 feet upstream of the splitter.  If there is a curve or "bend" within 2 feet upstream the water won't divide equally.