Replacing black tank slide valve
I have 2004 Safari, 25’ with a seeping black tank valve. I know that some models have all sheet metal underneath and in order to access valve you must cut a hole in sheet metal then scab over with another sheet. My model has black ridged plastic covers that cover the tanks and valves, one for each tank. They appear to be supported by 4 straps each. My first question Is can I access valves by dropping the plastic covers or do I cut a hole into the cover just like the metal ones? Looks like pretty big job and hard to get to to remove covers.
Second, to remove the leaking valve, are the plastic drain pipe glued together into the valve or will they slip out?
Thanks for any advise