USAID is currently financing the construction of water networks for a number of villages and municipalities on the West Bank. Deficiencies were observed by USAID in recent water network design related to hydraulic efficiency and the use of costly materials. Specific examples include: use of costly pipe materials has contributed to under sizing water mains and laterals, many undersized lines are classified as "service lines" and designated as branch lines rather than as elements of a "looped" network grid, concern about intermittent water flow has contributed to a practice of designing reservoirs to "directly feed" rather than more efficient "floating" reservoirs, inappropriate pipe materials contribute to high losses in the networks, the hilly terrain in many areas often result in high system operating pressures resulting in huge losses, design drawings lack minimal basic data with which to evaluate the adequacy of the design. To assist with reducing these problems and improving the design process of local engineers USAID and UNDP sponsored a two day seminar to introduce modem design practices and computerized hydraulic network design concepts. Included were alternative pipe uses and cost concepts.