Before I can answer that I have to know who was down in the crawl space at the time?
Nobody you say?
Oh---that’s right you said “sounds” like someone was!
When I entered the crawl space I could hear the all too common ticking sound of water dripping on the plastic ground cover. I could see it dripping off the bottom of a pipe right under the dining room area. It was the drain from the kitchen and the laundry beyond the kitchen. I asked my client to go and turn the kitchen sink on and then I waited a few seconds. Pretty soon it became quite obvious why it did indeed sound like someone was peeing in the crawl space.
A closer view of the bottom side of the pipe revealed a rather large hole that would allow “zero” water to actually go down the drain---but instead dumped it all right in the crawl space.
I cannot imagine what could cause a hole in a pipe like this, other than some sort of factory defect or mechanical damage to the pipe prior to installation in 1967.
Regardless the drain needs a plumber---and right now!
Charles Buell, Real Estate Inspections in Seattle
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WA State, Home Inspector Advisory Licensing Board