Post Falls, Idaho · PE Pipe Manufacturer
Built in the Pacific Northwest.
Shipped across the region.
Interstate Plastic manufactures polyethylene pipe products from our Post Falls, Idaho facility. We serve water utilities, contractors, and distributors throughout the Pacific Northwest and Intermountain West with domestically produced, NSF-certified PE pipe.
Our Story
Interstate Plastic was founded to fill a gap in the regional market: high-quality polyethylene pipe manufactured close to the customer. For too long, contractors and distributors in the Pacific Northwest were ordering PE pipe from plants in the Midwest or Southeast and waiting weeks for freight. We set out to change that.
From our Post Falls, Idaho facility, we extrude PE4710 and LLDPE products to ASTM standards, tested and certified for the applications our customers actually need — potable water service, turf irrigation, HDPE pressure mains, and drip irrigation. Our production runs are kept lean so lead times stay short and orders ship fast.
We are a small, focused operation. We know our products and our customers, and we pick up the phone.
What We Make
All products are manufactured at our Post Falls, Idaho facility.
Potable Water Pipe
PE4710 service line pipe in CTS and IPS sizing, NSF 14 and NSF 61 certified. Available in blue, black, and purple for reclaimed water service.
Turf & Irrigation Pipe
PE4710 and PE3608 coiled pipe for residential and commercial sprinkler systems. Sized for standard irrigation fittings, rated to 100 PSI.
HDPE Pressure Pipe
PE4710 IPS pressure pipe in SDR 7 through SDR 17. Used for municipal water distribution, irrigation mains, and industrial pressure applications. Heat fusion ready.
Drip Irrigation Tubing
LLDPE drip tubing and transmission line for precision irrigation. UV-stabilized and available in 50–500 foot coils.
Who We Work With
Interstate Plastic sells through authorized stocking distributors. Our products end up on jobs run by water utilities, irrigation contractors, landscape crews, and municipal infrastructure teams across the Pacific Northwest and Intermountain West.
Certifications & Compliance
Documentation available on request for project submittals.
NSF 14
Plastic piping system components certified to NSF/ANSI 14 for pressure applications.
NSF 61
Drinking water system components certified safe for contact with potable water.
ASTM D3035
PE pressure pipe manufactured to ASTM D3035 dimensional and performance standards.
BABA Compliant
100% domestically manufactured. Meets Buy America Build America requirements for federally funded infrastructure projects.