Shower drain out of plumb

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Hi Everyone,

I'm renovating a shower, building a shower pan using Oatey Pre Slope and Oatey PVC pan liner with 2" of dry pack on top. I just realized that the shower drain is out of plumb by about 1/4" per foot, which is what the drain pipe pitch is and I see other posts asking the same question. Should I just screw the drain flange to the subfloor as the ABS pipe has some flex or should I re-do the P trap trying to tilt the riser to compensate for 1/4" pitch? I guess putting some strain on the pipe is not good, but on the other hand I'm not sure whether I can make it perfectly plumb by holding the riser when the glue sets in. I'm just a DIYer renovating my own shower.


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