Improved Piping Products, Inc.® (IPP) is a leading manufacturer for your HDPE connection needs, with a full line of straight-line HDPE pipe fittings and the IPP Deltaflex® backup ring from 1/2" to 63".  IPP’s products are the most reliable and durable on the market, backed up by IPP’s ongoing, in-house quality assurance testing. IPP also carries the largest selection of in-stock HDPE fittings in the industry, ensuring 24-hour delivery on all in-stock items. With over 30 years in business, IPP is committed to providing the highest quality and most economical piping products for the thermoplastic industry.  Learn more »