Originally Posted by Stormrider151
I'm not sure it's a 3/8 ID. I'm just guessing at that. I'm just trying to avoid taking fittings apart to take the measurement. I'm really good at fixing stuff after I break it and if I start pulling stuff apart, well.... I'll break it.
I was just going by the 5/8 OD. Pick up one fitting(or both a 3/8 and 1/2 and return the extra) and a removal tool - which is a little plastic collar. You can pop the valve onto your line and verify it fits right w/ no leaks. If not it will just pop off with the removal tool. These fittings are kind of pricey for big projects, but I have found them to be unbeatable for a small job or repair, especially in a tight spot or someplace you don't want to glue or solder.
These have "teeth" that will bite into the plactic pipe, and I really don't think you have to worry about it coming loose - even bouncing down the road.