I first want to say thank you for all the ideas and help I’ve received here. Y’all are awesome!!! Hopefully my last question as I wrap up my build project. I built a stilt home and my 4” line runs under the home. It’s about 20 ft long from the front to the back where it will drop down to go over to the septic. I have a cleanout at the one end but I wanted to know if I should add one on the vertical drop at the back?