A good trap should have effective seal of

• The trap: Is a bent pipe in sanitary latrine, about 7.5 cms in diameter and connected with the pan Trap is a ‘Water seal’: it holds water; prevents access by flies and suppresses the nuisance from smell Depth of water seal in RCA sanitary latrine: 2 cms (¾ inch) Water seal in sanitary latrine is an example of ‘Sanitation barrier.’