ok heres my question: i am trying to make a DIY wet dry filter using a sterlite 3 drawer plastic file cabniet top drawer will be filter floss, middle drawer will be bio balls, bottom drawer will be lava rock. I am so ignorant about the plumbing parts like what they are called exactly what size i need and where to buy them. I have attached a pic of a wet dry filter showing the part i need to get so i can make my filter i know its a bulkhead but the terms they use for them are confusing to me like threaded or slip to slip. ok my overflow box i bought i have attached a pic of also it has a 1 inch u-tube and a 1 inch drain to the sump so i know i will need a 1 inch bulk head for my filter im building right? and what exactly is the pvc fitting called i will need that goes on the top of the filter that the hose from the overflow box connects to the top of the filter?  what is the right size i need and please be specific about what its called and stuff because i dont know the terms used for these pieces - thank you for any help - rod
  
 
				
			 
 
 
	 
	 
 
		 
		  
 
		 
	 
 
		 
	