Shower Drain Valve

[Elaine De]

Hi! I am new to my 1999 Casita Spirit. Enjoying this learning process but I am stuck. I can't locate the shower drain valve underneath. Can someone help?

[Elaine De]

I have discovered this particular Casita had an upgrade and does not have a shower drain valve. We took apart the pvc underneath, cleaned it, and shower is now draining.
However, if I run the kitchen sink water for awhile, it stops draining. If I pull the gray tank drain valve outside, the kitchen sink quickly drains. Any ideas?

[mary and bob]

There is a vent modification to help with the grey tank draining. The sink plumbing should be vented through the roof, check the caps on the vents, there may be a problem there. Go to little house customs web site for the tank vent mod and other great accessories.

[kayaker51]

You have an air lock. Make sure vent to free of stuff.