The Grazing Library
A practical guide to understanding HDPE connection methods and choosing compatible fittings for farm and livestock water systems.
HDPE fittings connect sections of high-density polyethylene pipe, change direction, create branches, and connect water systems to valves and other equipment.
There are several methods for connecting HDPE pipe. Choosing the correct fitting depends on the pipe's dimensions, material, pressure rating, installation requirements, and connection method.
USA Grazing Systems offers several fitting options, including Plasson and Philmac products, and continues to expand its HDPE fitting lineup.
Compression fittings create a mechanical connection to compatible HDPE pipe without requiring heat-fusion equipment.
These fittings are commonly used in agricultural water systems for installations, repairs, and connections to water tanks and valves.
USA Grazing Systems offers Plasson and Philmac compression fittings. Always select the correct fitting series for your pipe dimensions and specifications.
Electrofusion fittings contain embedded heating elements that use electrical energy from specialized fusion equipment to join compatible HDPE components. When installed correctly, electrofusion creates a fused connection.
Proper pipe preparation, scraping, alignment, and approved fusion procedures are essential.
USA Grazing Systems offers Plasson electrofusion fittings.
Push-to-fit fittings provide a mechanical connection by inserting compatible pipe into a specially designed fitting.
Depending on the design, they can simplify installation without conventional compression assembly or heat-fusion equipment.
USA Grazing Systems offers Plasson push-to-fit options. Follow the manufacturer's installation instructions and verify pipe compatibility.
Butt fusion joins compatible HDPE components by heating their prepared ends and pressing them together under controlled conditions.
The process requires specialized equipment, proper alignment, and approved fusion procedures. It is commonly used in larger water distribution and agricultural piping systems.
USA Grazing Systems is expanding its lineup to include butt-fusion fittings.
Socket fusion joins compatible HDPE pipe and fittings by heating the outside surface of the pipe and the inside surface of the fitting socket.
The heated components are joined using the appropriate tools and installation procedures. Use properly matched pipe, fittings, heating equipment, and manufacturer-approved procedures.
USA Grazing Systems is expanding its lineup to include socket-fusion fittings.
| Connection method | Special equipment required? | Connection type | Common applications |
|---|---|---|---|
| Compression | No heat-fusion equipment | Mechanical | Agricultural water lines, repairs, valves, and tank connections |
| Electrofusion | Electrofusion control unit and preparation tools | Fused | Permanent water distribution connections and installations requiring electrofusion |
| Push-to-fit | Typically no specialized fusion equipment | Mechanical | Compatible water lines and convenient installations |
| Butt fusion | Butt-fusion machine and associated equipment | Fused | Compatible HDPE pipelines and water distribution systems |
| Socket fusion | Socket-fusion heating tools | Fused | Compatible pipe-and-fitting systems designed for socket fusion |
Connection method alone does not determine suitability. Always verify pipe and fitting compatibility, pressure ratings, and manufacturer installation requirements.
IPS-OD pipe uses standardized iron-pipe-size outside diameters.
USA Grazing Systems' standard 200 PSI SDR 11 HDPE water pipe uses IPS-OD sizing.
Select fittings specifically approved for the pipe's outside diameter, material, and operating conditions.
IPS-ID is associated with inside-diameter-controlled HDPE pipe, including SIDR pipe.
Because the controlling dimensions differ from IPS-OD, confirm the pipe standard and dimensions before choosing a fitting.
Use fittings specifically approved for the pipe type, pressure rating, and installation conditions.
CTS sizing follows copper-tube-size outside diameters and differs from IPS sizing.
Do not assume that a fitting for IPS pipe will fit CTS pipe, even when nominal sizes appear similar.
Check manufacturer specifications for the exact pipe dimensions, material, pressure rating, and fitting series.