So I've seen where people make umbrella holders to put into the deck while it's being poured. Seems like a common solution to that is DIY pvc pipe with a screw in cover. I was wondering if anyone knows someplace you can just buy umbrella holders to put in the deck? Ideally I'd like the ones that have the brass caps but I'd be interested in any places ya'll are aware of.
On a semi unrelated sidenote, those big cantilever umbrellas seem like they always have a 4 bolt pattern that ties them to their bases. Has anyone set bolts sleeves or something similar to be able to bolt one of those onto the deck later? Thanks!