WP(C) 1653/2011 BEFORE HON’BLE MR JUSTICE B D AGARWAL Heard Mr. GN Sahewalla, learned senior counsel for the petitioner and Mr. B Ghos h, learned government advocate for the respondents. . The petitioner is the manufacturer of Asbestos Cement Pressure P ipes ( ACP pipes) . The petitioner’s grievance is that though there are specific guidelines issued by the Central Government for utilising various kinds of pipe s in water supply schemes, however, the PHE, Govt. of Assam occasionally violate s the said specifications. In other words, it is the case of the petitioner that on many occasions, the department is not purchasing the ACP pipes. In the affid avit, submitted by the Secretary, PHE depttt, it has been stated that the depart ment is following the guidelines laid down by the CPHEEO Manual as well as the r elevant standard laid down by the Bureau of Indian Standard (BIS) while designin g and executing the water supply schemes of the state. In his affidavit, Secretary, (PHE) deptt. has further st ated that after due consideration of all the aspects including suitability, dur ability, pressure rating and cost effectiveness of the pipe material’s for the u se of piped Water Supply Schemes (PWSS), the pipes materials are be used as ment ioned below: 1. UPVC pipes upto the nominal diameter of 90mm as next available higher di ameter is 110 mm. 2. ACP pipes for the nominal diameter 100mm to 600 mm as per CPHEEO manual. 3. Metallic pipes for the nominal diameter 100 mm and above as per CPHEEO m anual. But in view of cost consideration, ACP pipes may be adopted within the a llowable range as mentioned in the CPHEEO manual. As per Government policy, all above pipes should be ISI marked. In view of the aforesaid statements made in the affidavit of the Government, the writ petition stands disposed of with a direction to the govern ment to purchase the pipes of the aforesaid materials as per field requirement i n particular schemes. At the cost of repetition it is made clear that the pipes should be certified by ISI or it should conform to BIS standard