I have a lg lhd45elt8 dehumidifier i bought used i want to hook up the hose connection i see on the back a plastic chip that needs to be removed and the hose pipe is just inserted? then connect a drain hose?

I own this dehumidifier. To connect it to a garden hose for drainage you first need the special connector pipe/adapter that comes with the unit. It's white plastic and about a foot long, It may be stored in the top of the bucket drawer, where it ships from the factory. Your hose connects to the threaded fitting on one end. The other end is inserted into the hole in the back of the unit. You slide it straight in until it mates with a drain connection inside the unit. You can see this black pipe connection if you pull the bucket drawer all the way out and look in the very top right hand corner of the opening of the unit. Once the white tube is fully and correctly inserted you'll find two plastic tabs on the tube near the hose connection. The larger tab points straight up and blocks the tube from being inserted too far. The smaller tab points down and hooks into the slot in the bottom of the round opening to keep it from getting knocked loose. Your dehumidifier should now drain through the hose instead of into the bucket. Of course, be sure your hose is routed across a floor to a drain or sump pump located lower than the unit, since the water flows by gravity.

Yes, to all to all three questions. Make sure though, that the hose pipe is firmly connected. It's best to attach the hose to it, prior to inserting the pipe. That way,you can carefully tighten the hose to it. Don't over tighten it, as it's plastic and will crack.