Probably an easy question for most

[William Jensen]

On my coach there is a silver, flat metal bar that is screwed onto
the side wall of the grey water tank compartment. The compartment
that has your valve opening controls. At the end of the bar, there
is a 90 degree angle, the about another 2" length and a half moon
cut-out at the end. You use this to Pry up the stuck valve. If
you don't have one, then as George said, use a big screwdriver.
Air up your coach, and open the valve switch. Gentle prying will
open the valve.

Once open, you need to lubricate it up. And it doesn't help just to
spray lubricant on the shaft. And don't do that!!! That is not
where it sticks. If you go to the wanderlodge owners online site, I
have a excellent pictorial on how to remove and replace, or just
lubricate the valves. It is under the article section, sub-category
repair and maintenance. You may need new valve paddles, and those
can be purchased from Jeff Miller at the Dupree site that John
listed.

good luck

William Jensen
1993 PT40 WBWL
Deerfield Beach, FL