A lot of vendors here can do this for you you just have to bring it to them 1 3/4in..hole for a 1in pvc drain.... You have to make sure the holes are big enough so mthat the pump you use doesn't make them work to there full capacity...This will make for a very noisy drain...But on the same note you don't want the holes to be much bigger than the pump can handle....Which pump do you plan on using???