Dometic Sealand Toilet will not shut off -- Overflow

Here is another brand: Flair-It fitting.

The reason I like the Flair-It (and possibly the Watts since it is rated for behind wall installations) is that it squeezes the tube, and does not depend on a single O-ring for installation. The problem with some of the "*-bite" fittings is that only an O-ring separates the water from the floor of your rig, so if it gets nicked on install or if chlorine in the water erodes it, it will start leaking.