water pressure relief valve??
 

Does a water pressure relief valve need its own water dump? or can I tap into my dry exhaust hose dump. or bilge pump hose?? Ext?

I ran mine out so that it sprays on my upper drive housing, for some additional cooling.
The bilge pump tee won't work. You'll pump your hull full of water back through the pump housing. Not sure about the dry exhaust hose. I think you'll have a lot of internal line pressure at high rpm, which could restrict the outlet flow on the water pressure dump line.
I would just do a dedicated line. It's easy.
Steve

Thats kind of what I was thinking!!!

I welded a bung into my silent choice divertor valves to dump my water.
I agree with Steve, no on the bilge pump. You'd need a check valve to do so to make sure it doesn't back flow, but that may effect the bilge pumps abilty to work as and WHEN needed. :)