Comparison : Item # 06104-02, Lead Free 104 Union (Female Pipe x Female Pipe)
Item # 06104-04, Lead Free 104 Union (Female Pipe x Female Pipe)
Item # 06104-06, Lead Free 104 Union (Female Pipe x Female Pipe)
Item # 06104-08, Lead Free 104 Union (Female Pipe x Female Pipe)
Item # 06104-12, Lead Free 104 Union (Female Pipe x Female Pipe)