If you're not willing or able to work thusly, you should probably just invest in other areas that truly are "passive" e.g. stocks/bonds, etc.Yes really, she's a terrible tenant who got great service from us and who moved into our freshly rehabbed home that was in perfect brand new condition.We go the extra mile to provide a top notch product and service but there are limits on how much time can be spent on a passive investment.

The following code supports Susan's and my remarks:§ 1.263(a)-1(f)(1)(i) Except as otherwise provided in paragraph (f)(2) of this section, a taxpayer electing to apply the de minimis safe harbor under this paragraph (f) may not capitalize under § 1.263(a)-2(d)(1) or § 1.263(a)-3(d) any amount paid in the taxable year for the acquisition or production of a unit of tangible property nor treat as a material or supply under § 1.162-3(a) any amount paid in the taxable year for tangible property if the amount specified under this paragraph (f)(1) meets the requirements of paragraph (f)(1)(i) or (f)(1)(ii) of this section.

Originally posted by @Frank Romine:@Jim WorkmanLock down all your exterior faucets.Frank Do you have a specific product you've used for this that has done well?

With that in mind, the burden is on you (not the investor) to secure the right product, with the right information, in the right way, and at the right price. 

I spent a few bucks at the hardware store on some cheapo tools and the least expensive products I could find.

Excellent product and even better support and educational material

Maybe because I posted links to products and they thought I was advertising? 

A good product will sell itself.  

Different companies use different terminology as this is a fairly unknown product.

I plan on going over there tomorrow to visit the property and see what type of condition they are keeping it in, but I was wondering what recommendations you all may have for dealing with this issue, both products that are effective, as well as dealing with the tenants if they are in fact keeping the home in unsanitary conditions.