If you can't find what you are looking for also try :
    
          1. Start with one or two words then add more words to narrow results. 
	    2. Do not connect words together and be sure to check for "0" (zero) verses "O" (the capital letter O).
	    3. If you are searching catalog numbers, leave out any spaces. (MB 18 01 would be MB1801)
          
             You can also use the * as a wild card. 
             
              Example : MB* will return all pages with items starting with MB* and 
              IRON* will give you things like test kits and Iron filters. 
              *1801 will return filters for Barnstead water system 
              *1001 will return standard filters for home water systems.