Thanks to those that offered help. I had to make fittings to connect Intex SWG to the 1 1/2” plumbing of the rest. I posted pics and a description in my other thread but it is not appearing so I’ll do it here. I went to Lowes and bought 2 sch40 regular couplings PN 23901 and 2 sch40 bushings PN 23920. The face of the bushings had size,sch40, etc…. A friend of mine has access to a lathe and he faced the bushings flat, second picture. I used the Intex threaded ring/locking ring, the bushing fits like it was made for it. Then I glued the bushing to the coupling with the ring in between with just enough space to freely turn the locking ring. And the rest is just how I plumbed it altogether. Almost done filling the pool, no leaks yet but nothing is under pressure yet. 
No problems now getting in there as needed with all those unions. Classy.
