So I have read that schedule 80 can't be mixed with schedule 40 PVC
. I also read that the inner diameter is the same??? My question is the bulkheads my aquarium came with are schedule 80 bulkheads. Does this mean I have to do my entire PVC
plumbing in schedule 80 as well? The inner diameter has threads on the bulkhead and it seems to fit when I thread a schedule 40 fitting IN it (I guess I'm using the inner diameter so it works?) I'm unsure... It seems like it fits tight and right but I don't want to cement this down the line and have it leak. Can anyone verify if this is possibly correct? Thanks.