The tenants (both) were warned that if it happened again, they would be billed for the plumber visit (note: both tenants are female, but I have my suspicions about who is flushing products).Well, surprise surprise, it happened again EXCEPT this time the tenant (the one I believe is flushing products) called Code Enforcement instead of calling me. 

Make sure you heed Joe's warning about inspecting the place first.

Some of my friends warned me about that as well and after a quick look at some temp agency jobs in SA it is true.

Warning only talk to him once and do not do this yourself, lawyer up and start eviction proceedings.

I’m issuing the first warning notice but then staying out of anything like this going forward.

Because they contacted you to complain, you need to warn the noisy tenant.  

If I click reconcile against the warning QB throws up, an automatic Journal Entry is made balancing the account which changes the balance shown on the Register for that Account.

YOU have luckily been warned!

Or asking for things like changing out a perfectly good lock on the front door or stuff done that doesn’t need to be done consider this a warning sign and don’t rent to them.

If you discover your tenants are incapable of having an environment clean enough that they aren't the roach hotel on the block, regardless of warnings, you just give them 30 days notice to move.