There are several questions to ask to make sure you have the right parts on hand.

1. Type
   1. Shower
   2. Kitchen
   3. Bathroom (Lavatory)
2. Brand
   1. Kohler
   2. Price Pfister
   3. Moen
   4. Delta
   5. Other
      1. Generic
      2. Foreign
   6. Function
      1. On/off
         1. Pull out/push in
         2. Rotation
      2. Number of handles
      3. Sprayers