That was a genius strategy to make you think that the new deck was original so that you would not know that the pool floated and needed a new deck.In fact the previous owner's three children left little footprints and the date (2001) on a corner of the deck when they poured the concrete.
I think that is a good plan, make sure the patio/deck whatever you want to call it slopes downhill that short distance from the house to the drain.I'll tell you how that happens. The genius who built the deck poured 3-4" of concrete on one side of the house and 0.5" to 1" on the other side.
I went with the channel drain. I emailed the drainage guy to move forward with it. Fingers crossed!
The house we bought a year ago had some drainage issues too that took me a minute to figure out. Thankfully they didn't build the deck up tight to the house, and the deck is level with the existing patio slab (~ 1.5 in. down from the door sill plate). I have a complement of eight interconnected drains; one downspout drain, one overflow in the pool, three in the deck between the house and pool, and three more in the beds between the deck and the house. With a big rain the pool wouldn't drain, the water would back flow into the flower beds and ultimately run off through the yard. Thankfully the landscaping is graded away from the house so no water intrusion issues. I searched for blockages and ultimately found the culprit - the popup valve at the street was completely overgrown. Took a while to even find it.You know, I've never actually tested it. I know water going down the patio drains makes it out to the street. I'll run a hose tomorrow through that overfill drain and see if water makes it out.
Unless you are getting the water removed, then the drains are unlikely to help.We finally got the channel drains installed last week.
Sorry see now but you would still benefit from a sump pump anywhere on that level where you can afford little space and not be an obstruction.That's not my basement (I don't have one). That's actually the living room. What you're seeing outside the window is the pool deck and spa.