Many online retailers offer high-density polyethylene pipes. CarlonSales.com is one of the two largest manufacturers of high-density polyethylene in the United States as of 2015. Big box stores like Home Depot.com, local plumbing supply stores, and online sellers like Amazon.com offer a more generalized selection.
HDPE insulates electrical wires and resists chemicals, moisture, impacts and puncturing. It comes in round, rectangular or square flexible extruded shapes with hollow centers. It resists melting or expanding in temperatures up to 180 degrees Fahrenheit. Before ordering, determine the required outside diameter, inside diameter and length.
Carlon offers a complete line of pipe, duct and conduit products used to house and protect fiber-optic and metal cable or transfer fluids. It ships orders via telephone or online consultation. The company can quote more detailed specifications, and its technical experts can help customers determine what they need for their particular application.
Local specialty stores that sell plumbing and electrical supplies carry inventory purchases from OEMs like Carlon. They usually have experts on staff and can special order anything they don't already have in their inventories.
Home Depot and Lowe's have smaller inventories and more generalized customer service. Amazon.com and other online retailers offer specifications and prices for comparison shoppers and often offer customer reviews for the products they sell.