Black Valves

[ppotter14950]

Hi there

Still going thru shakedown of new unit and tried to open gray and black
tanks valves.

I was able to twist gray water handle and with some force able to open
it, but on the black, i was only able to twist about 90 degrees and it
would go no further. Does this mean i am done and need to replace, or
is there some way to lubricate or service to try and bring back to life.

If i am don, do i replace with another Dupree Products valve, or go to
camping world and buy a regular knife type valve and adapt it.

Also another newbee question, where is the hot water heater located? I
glanced over some post earlier but was not paying attention about water
heater stuff so i apoligize about that, but i have opened every door
and have not found it yet.

Thanks again

Paul & Deborah Potter
1987 PT38
Hesperia CA