I am new to RVing
... I purchased a 2010 8528RLWS in Dec. and cannot tell which valve is for Black and which is Grey. Their is no specific label for each. One is recessed back a good bit and there is a label above that says Waste Water Dump Valve. It's all waste water to me so that doesn't tell me anything definite.
Can anyone help.... Is there some identifying factor that works for all RV's? Short of filling a tank and testing - How do I find out? The manual is no help. Yes, I asked the PDI tech and he was not sure.
Thanks in advance for any help