This works:

{

	"variants": {
		"type=pillar_bottom": { "model":"tknowledge:everfull_fountain/pillar_bottom" },
		"type=pillar_middle": { "model":"tknowledge:everfull_fountain/pillar_middle" },
		"type=pillar_top": { "model":"tknowledge:everfull_fountain/pillar_top" },
		"type=side": { "model":"tknowledge:everfull_fountain/side" },
		"type=side_dioptra": { "model":"tknowledge:everfull_fountain/side_dioptra" },
		"type=side_fluids": { "model":"tknowledge:everfull_fountain/side_fluids" },
		"type=wall_lr": { "model":"tknowledge:everfull_fountain/wall_lr" },
		"type=floor": { "model":"tknowledge:everfull_fountain/floor" }
	}
}



This one is broken:

{
"forge_marker": 1,
	 "defaults": {
		"textures": {
			"all": "missingtexture"
		},
    "model": "cube_all",
    "uvlock": true
  },
	"variants": {
                "type": {
                        "pillar_bottom": { "model":"tknowledge:everfull_fountain/pillar_bottom" },
                        "pillar_middle": { "model":"tknowledge:everfull_fountain/pillar_middle" },
                        "pillar_top": { "model":"tknowledge:everfull_fountain/pillar_top" },
                        "side": { "model":"tknowledge:everfull_fountain/side" },
                        "side_dioptra": { "model":"tknowledge:everfull_fountain/side_dioptra" },
                        "side_fluids": { "model":"tknowledge:everfull_fountain/side_fluids" },
                        "wall_lr": { "model":"tknowledge:everfull_fountain/wall_lr" },
                        "floor": { "model":"tknowledge:everfull_fountain/floor" }
                }
        }
}