Plastic Cement, they sell it at Lowes or Home Depot, the brand is Oatey and it says for PVC and ABS and most plastics. Normally I sell a similar glue from Germany, made by Henkel, it is called Tangit but we are out, it is about the same just thickened and in a tube so it is much easier to use. Model glue will also work, the good kind :lol: