harppaa sanskriti ke nagaron men int kaa istemaal ek vishesh baat hae, kyonki isi samay ke misr ke bhavanon men dhup men sukhi int kaa hi prayog huaa thaa. Samakaalin mesopetaamiyaa men pakki inton kaa prayog milataa to hae par itane bare paemaane par nahin jitanaa Indus Valley civilization men. Mohan jodaro ki jal nikaas pranaali adbhut thi. Lagabhag har nagar ke har chhote yaa bare makaan men praangan aur snaanaagaar hotaa thaa. Kaalibangaan ke anek gharon men apane-apane kuen the. Gharon kaa paani bahakar sarkon tak aataa jahaan inake niche moriyaan (naaliyaan) bani thin. Aksar ye moriyaan inton aur patthar ki silliyon se dhakin hoti thin. Sarkon ki in moriyon men naramokhe bhi bane hote the. Sarkon aur moriyon ke avashesh banaavali men bhi mile hae.