[DmaxDually]

C/W has them but I got mine cheaper off Amazon. The great thing about the flush king valve is 1.it's clear so you can see the water comming out of you tanks so know it's clean and 2. it has a gate valve on it so you won't get any surprises when you take the cap off to dump if any one of your valves have a slight leak. The previous owner left one of the grey tank valve open when I bought my rig. The first time I dumped I got a surprise. That's when I went and got the king flush valve so even if I ever forget a valve open or one leaks that won't happen again because of the extra gate valve.