uPVC Pipes for Irrigation: How to Choose the Right Pressure Pipe

An irrigation system is only as reliable as its pipes. A leaking or rusting line wastes water and pumping energy, and a pipe that is too small or too weak for the pressure fails early. uPVC pressure pipe is a common choice for farm water lines because it does not rust, is light to handle and is easy to lay underground.

What Vinyl uPVC pressure pipes offer

Vinyl uPVC pressure pipes are made for municipal water supply, irrigation and industrial lines. They handle high internal pressure, resist corrosion and are safe for drinking water, which suits farms that use the same source for livestock or household use.

How to choose an irrigation pipe

1. Start with pressure. Find the highest pressure the pump can put into the line, then choose a class rated above it. Leave a margin for pressure surges when the pump starts, stops or a valve closes quickly.
2. Size the diameter for the flow. A pipe that is too small forces the water through faster, which raises friction loss and pumping energy. Base the size on the flow rate and the length of the run.
3. Plan the layout. Irrigation systems normally run a main line from the pump, sub-mains across the field, and laterals to the outlets. The main line carries the most water, so it needs the largest diameter.
4. Bury the pipe. Vinyl pressure pipes are designed for underground installation. Lay them deep enough to stay clear of ploughing and vehicle loads, on an even bed free of sharp stones.
5. Protect exposed sections. Where a short stretch has to run above ground, shield it from direct sun or ask the manufacturer about suitability.
6. Flush and test. Flush the line to remove dirt before connecting outlets, then pressure-test it before backfilling.

uPVC or HDPE for irrigation?

uPVC pressure pipe is rigid and comes in 6 m lengths, which suits straight buried mains. HDPE is flexible and joined by heat fusion, which suits long buried runs over uneven ground. Many farms use both. Our guide to uPVC vs HDPE pipes compares them in detail.

Pumping from a borewell

If the water comes from a borewell, the pump sits on a column pipe inside the casing and feeds the surface line. Vinyl makes uPVC column pipes for that job, and the same corrosion-free advantages carry through the whole system.

Frequently asked questions

Can uPVC pipe be used for drip and sprinkler lines?

uPVC pressure pipe is normally used for the main and sub-main lines that carry water across the field. Drip and sprinkler laterals are usually a separate, smaller-bore pipe chosen for the emitters; confirm the combination with your irrigation designer.

Does uPVC rust or scale?

uPVC does not rust, and its smooth bore helps water flow, which reduces the build-up that can restrict metal pipes.

How do I choose between pressure classes?

Pick the class whose rating is above your maximum working pressure including surges. Higher classes cost more, so avoid over-specifying, but never run a pipe near its limit.

Planning a project? See pipes for agriculture and irrigation or contact Vinyl Pipes with your pump pressure, flow and line length.