Keep asking why until you get to the root reason.

Initials: _______Tenant agrees to pay for clearing the sewer drains of the Premises of any and all stoppages, except for those stoppages which the Landlord will agree were caused by defective plumbing, tree roots, acts of nature, or which are declared in writing to have been so caused by the plumber or other person who is called to clear the stoppage.

Always knew that some FHA's don't qualify but was curious to what were most of the root causes. 

Our line was broken off the main and had tree roots going through the old pipe.  

There are tree roots growing into a combined pipe that I share with the attached unit (owned by different Landlord).

I'm rooting for you.

Tenant agrees to pay for clearing the drains of any and all stoppages except those, which the plumber who is called to clear the stoppage will attest to in writing, were caused by defective plumbing, tree roots, or a result of weather.Tenant agrees to keep on hand and properly use a plunger when necessary to unclog drains and to prevent water overflow from toilet, sinks and bathtub.

. :-) Fair response...I know you know...but I'm also sure you know, some (Not you) take such a literal translation of the root etymological definition of a word and run with it.

I guess the root question is, can an LLC with me and my partner legally manage the property without a license?

@Hilary Hageman Also keep in mind that my "un-sellability" perspective with SFRs is more rooted in my California experience.