Purchased from Marine Depot and having an issue with the outlet assembly on the unit. I need a new assembly that fits. I received an outlet assembly but it appears to be too small and looks to be the replacement for the s-3002/s-1502 unit as the union is too small to fit the s-4002. I contacted customer service via the website but have not gotten any response. I would just like to exchange the s-3002 outlet assembly for one that fits the s-4002 denitrator. Please advise as to how i can acquire this part. Thank you and feel free to PM me with any direct instructions. I don't care if there is a restocking fee or anything i just need the correct part. The S-3002 outlet assembly is still in the packaging. Thank you for any assistance.