Plumbers are awesome and I have a great regard for them. When I was looking at buying a house, we had an inspection done. The home inspector found water in the crawlspace and he made excuses about why he couldn't go down there to make a determination of the cause. We called up a plumber and they came for a free estimate. The guy wore a disposable coverall, went down into the water and found the source of the problem. The repair costs would have been too much so we canceled our offer. Next house we did buy however, we took an opportunity to use the same plumbers for any improvement work done.