Why can't you run the pipes the other way to the skimmer and just go around the deck passed the slide.
What name should we use to do a search to find them?
This times 100. Please be careful, Casey and team...Wood to support the sides and concrete, another person there for safety. I so want to say do NOT go under there but know you enough to know you will be careful as can be.
You guys can do me a favor and start giving me the best advice on digging out under a 4ft deck.
I'm going in at the corner of the pool step out.avoid digging near the supports. Also, if you have a bottle jack and a long enough piece of timber, run the timber along the ground and bottle jack the deck just to be sure. Don't know the size and where you are digging, just some random thoughts.
I'm using 2"sch 40 since I found it. I was lucky to get there on delivery day and bought all 14 10 ft sections.If I follow this plan correctly, you are trying to get the 3" rigid PVC under the slab and connected to your existing skimmer box.
Go rent a bullet mole / pipe mole. You may have to pothole the slab next to the skimmer box to make the attachment.
Use a driven / impact mole, not a hydro one, I would be concerned about the water and the gravel that should be around your fiberglass pool as backfill.
Are you intercepting and joining to the flex PVC there, or are you going all the way to the skimmer?I'm going in at the corner of the pool step out.