Here are examples from our lease:"DRAIN STOPPAGES. 

I've seen too many GC's that roll money from one job into another, leading to work stoppages.

in buy and hold real estate you risk in a down turn is not devaluation of the asset per se. the only risk that presents is if you want to exit and you lose your downpayment money or have to stroke a check to exit.the risk to a buy and hold investor is stoppage of cash flow.. 

Work stoppage/slow down.  

Usually depends on two things: 1) What caused the clog, and 2) How your lease reads.For example, my lease says “Tenant shall be charged for repair of drain blockages or stoppages, unless caused by defective plumbing parts or tree roots invading sewer lines.I have had tenants call me about clogs that were found to actually be caused by tree roots.

The service contract is a one year contract covering a multitude of systems and appliances needed for everyday life.Here are a few of the key things to remember:•No home inspection is required as a condition to purchase*•The contract covers certain household system components and appliances regardless of age, make, or model*•You pay a trade service fee for each occurrence, regardless of the actual cost to repair or replace the broken item(s)*Our Basic coverage includes:Heating Systems Plumbing Systems Electrical Systems Water Heater Oven/Range/Cooktop Dishwasher Built-in-Microwave Garbage Disposal Exhaust Fan Ceiling Fans Plumbing Stoppages Ductwork Or you can expand your coverage to include:Central A/C Refrigerator Clothes Washer Clothes Dryer Garage Door Opener Well Pump Pool Spa Several afforadable plans are available to fit your home and budget needs.

Here another question for you, which plan should I go for a basic plan or premium that includes central vac sys, duct work, electrical, heating plumbing, plumbing stoppages, and water heater?