Can I go from using existing Closet Flg. 4
My cement floor in the bathroom has settled over many decades (Cabin) and am pretty sure it's done settleing. I leveled the floor up and now have a 4" gap between existing closet flange (4" ID Sch.40) and new finished floor height. My question is can I keep existing Closet Flg. And add on an extension PC.to bring it up to new floor level plus new closet Flg. The drop in extension pieces have been to short at H.Depot/Lowes, they'll cover the 4" gap but I need it to recess farther down into existing C.Flg. I'm trying to avoid cutting and piecing out existing Flg. although seems like the rout to go and then add in a 4" x 7" glued nipple into sewer inlet PC. Topped off w/ new C. Flg. So if there is better/different way I'm all ears. Thank you in advance for the advice.