LPG could be filled from:
Back side of Mairaj Hotel, G9 Markaz, Islamabad
LPG guy at Taramari Chowk, Tarlai
Agha Gas Service, Alahabad, Rawalpindi
LPG Vendor, Opposite Kohinoor Mills
LPG Vendor Near Passport Office, Haji Complex
Sajeel Gas, Main Adyalla Road, Rawalpindi
or try to find any LPG retailer near your area, nowadays most of the retailers have CNG nozzle.
Cost of water pipers and setting was Rs. 800 and car is Margalla 1998 stock engine with performance plugs