Established in 1993, Guanfa Valve Manufacture Co., Ltd. is specialized China drain pipe manufacturer and distributor of valves, hoses, tubes and pipes. Our oem drainage pipe are suitable for acid, alkali, water, steam, seawater, coal gas and natural gas. They are widely used in petroleum, chemical, paper making, fertilizer, brewing and metallurgy. The use of specialized software of Pro/E and CAD has shorted the P&D and trial manufacture cycle, and greatly improved the service life and dependability of products. Our high-quality products have been exported to the North Amercia, UK, USA, Germany, Italy, India, France, Australia, Japan.

A solid pipe appropriate in applications that involve moving water from one point "FLEX-DRAIN" SOLID DRAIN PIPE 25 4" OD A solid pipe appropriate in applications that involve moving water from one point to another (Away from downspouts) Does not allow water to seep in or out anywhere except pipe ends Expands from 6 to 25 Compatible with other 4" drain pipes and fittings Sleeved
The trench drain system is a timesaving, moneysaving system because it eliminates the need for on-site forming. A positive slope built into the channel sections ensures proper drainage. Pipe connections are easily made with the use of built-in pipe cutouts, drain end caps and catch basins.

Blue Diamond Corr-A-Flex is a corrugated HDPE (high density polyethylene) pipe.Corr-A-Flex is available in diameters from 3through 24.Overall lengths are determined by the integral bell spigot design. Laying lengths are 20 feet. Pipe 3through 6is available in 100and 250coils.For highway drainage projects, 3-6maxi-coilsare available in lengths up to 3000.Pipe is also available perforated and slotted in sizes 3-8.
Corr-A-Flex meets ASTM F 405 material specifications in diameters ranging from 4to 6, and ASTM F 667 for the larger diameters. Perforations and physical properties meet AASHTO M 252 for 10and smaller and M-294 for 12and larger, Type C (corrugated) and CP (corrugated and perforated.) Standard pipe comes with an integral bell and a spigot joint. External couplers are available. Standard bell and spigot pipe meets soil tight specifications per AASHTO M-294.

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