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General Links:

LASCO Fittings, Inc.
LASCO Fittings, Inc. specializes in the production and sale of injection molded fittings for Irrigation, Plumbing, Industrial, Pool/Spa and Retail markets.

NSF International
A not for profit organization committed to public health safety and protection of the environment. Search for NSF certified products and order publications.

ASTM (American Society for Testing and Materials)
One of the largest voluntary standards development systems in the world. Search and download standards.

Irrigation Association
Since 1949, Irrigation Association® members worldwide have worked toward a shared vision - water conservation through efficient irrigation. The IA promotes modern water management skills and techniques for irrigated agriculture, turf, landscape and golf.