Vanguard Industries
Vanguard manufacturers engineered polyethelene (PEX) piping/tubing and water management systems for the plumbing and HVAC&R industries. http://www.vanguardpipe.com/
Tahoe Design Software
Develops piping design, pump selection software and custom product promotion CDs. Free software downloads are available at their website.
American Concrete Pressure Pipe Association
Organization for manufacturers of certified concrete pressure pipe products including concrete pipes, cylinders, joint restraints, and irrigation for the water and wastewater industry
Orion Fittings, Inc
Orion's high purity and ultra high purity systems are manufactured from pure, unpigmented, virgin polymers using no anti-oxidants, pigments or other foreign substances often associated with other plastic piping products.
Unaflex Inc.
Manufacturer's of rubber, flexible metal and teflon lined expansion joints and hose, sheet rubber and high temperature flue ducts.
