The 1-1/2 inch gray water pipe you need is not something we carry. We do however carry the connectors, fittings, and valves. I've linked the pages to those fittings but the drain pipe lengths you will need to obtain from a local home improvement store. You will use the LaSalle Bristol ABS Solvent Cement - Black - 1/2 Pint # 3447530889 for those connections. view full answer...