New Lavac Explodes!

[glenda2]

We have just had two new Lavac heads installed. They are wonderful except when the need comes to flush more than liquid. After solid waste has been flushed, I raise the lid and it has blasted the entire bowl and lid and seat with waste. Yuck!

I've tried different approaches to pumping. Have added water prior to a flush (there doesn't seem to be enough water in the bowl). 'Have at times pumped almost twice the times stated in the directions as it doesn't sound as if sufficient water is coming in (on the first 8-10 pumps). Have pumped slowly, quickly, or at high speed with no differences.

Our holding tank is above the height of the head in the forward part of the boat, below in the aft head. Both have the same problem.

And of course it is an intermittent problem!