Protect Your Irrigation Pipelines

Corrosion of standard galvanized pipe can occur, especially when growers use less desirable water sources, such as wastewater, process water, and even corrosive water; and when producers add crop protection chemicals or soil amendment products to their irrigation water.

Valley PolySpan irrigation poly pipes protect your irrigation pipelines from any corrosive components in your water, ensuring a long life for your machine. Repiping is the most economical way to significantly extend the life of your machine.

valley polyspan pipeline for corrosive water conditions

PolySpan Benefits

  • PolySpan is made from an inert material, making it ideal for chemigation, fertigation and resisting corrosive water\
  • No leaking – wide-gasket, self-locking couplers ensure a water-tight seal
  • Long lasting – the first machine with PolySpan, installed in Utah in 1992, is still operating
  • All structural components – from pivot pipe to last pipe – are lined and poly protected
  • Not affected by abrasion from sand or sediment in irrigation water
  • Highly resistant to sunlight and humidity
  • Same weight as a galvanized span when filled with water

PolySpan Features

  • Warranty: 20/10 pipeline corrosion warranty includes unconditional replacement due to corrosion for the first 10 years or 30,000 hours, plus an additional 10-year, pro-rated warranty.
  • Robust design: Designed for agricultural, industrial and municipal water applications.
  • Greater profit and productivity: Allows you to take advantage of corrosive water, and allows chemigation and fertigation with aggressive chemicals.
  • Minimizes pressure loss: Sprinkler outlets: Full size ¾” dual-gasket, self-locking couplings for minimal pressure loss and no leaks.
  • Versatility: Available for: Valley center pivots, Valley linears, Valley Precision Corner®, Valley VFlex™ Corner, Bender30™.

Choose the Best Pipeline for Your Application

  • When water quality changes, we’ve seen aluminum, galvanized steel, weathering steel, and even stainless pipe corrode. PolySpan is completely resistant to these changes and protects the significant investment you’re making in an irrigation machine.
  • Other so-called corrosion resistant pipelines are sensitive to a number of corrosive elements commonly found in irrigation water. More importantly, some combinations of these elements will result in accelerated corrosion rates.
  • Weathering steel is only slightly more corrosion resistant in irrigation applications than plain carbon steel. It is sensitive to humid subtropical climates where the protective patina may never stabilize, so it continues to corrode. Painting reduces the corrosion resistance of weathering steel, as well. Even the smallest defect in the paint is an opportunity for corrosion failure.
  • Stainless steel is sensitive to levels of chlorides above 40 ppm and sulfates greater than 100 ppm. It is also sensitive to highly basic or acidic water (pH greater than 11 or less than 4). It is not recommended for soft water and can be incompatible with certain farm chemicals, such as soil remediation products.
  • Aluminum is sensitive to levels of chlorides and sulfates above 50 ppm, pH greater than 8.2 or less than 5.0, crop production chemicals containing high levels of sulfur or copper, fertigation products such as phosphoric acid, and soil remediation products using sulfuric acid.

Valley Value


Field-proven since 1992.


Increases the life of your center pivot pipe by protecting it from corrosion.

Both 60" and 108” outlet spacing available for a variety of crop row spacing and sprinkler packages.


Available for Valley center pivots; Valley linears; Valley Precision Corner; Valley VFlex Corner; Bender30.

Valley dealers offer fast, dependable service.  

Your Local Valley Dealer

Only your local Valley dealer can give you the best advice on which irrigation equipment and options are right for you. Find your dealer today!