There is a shop near the wholesale market near salwa road. There you can get all pipes and fitting for sprinkler and dripper systems. They can give you advise on which is the best for your garden, etc. They might be also able to come and install it for you. Here is the link to the shop on google maps. Outside the shop you'll see lots of black pipes, you can't miss it. .... Good luck !

http://maps.google.com/maps?q=25.247697,51.47837&num=1&t=h&sll=25.246976...