Updated: July 19, 2026

PVC Pipe Sizes & Dimensions Chart: Complete Reference for Malaysia

Quick Summary

This article is a complete reference chart for PVC pipe sizes and dimensions available in Malaysia. Pipes are sized by nominal diameter (from ¾ inch up to 18 inches) and graded by pressure class (B, C, D, and E) under the MS 628 standard. This guide covers the size range, class-by-class pressure ratings, standard lengths, and how to read pipe dimensions correctly when ordering.

Bookmark this page as a quick reference for your next plumbing or drainage project.

Getting PVC pipe dimensions right is the starting point of any plumbing or drainage job. Order the wrong diameter and your fittings won’t match; order the wrong class and your pipe won’t handle the pressure. This guide consolidates the sizing data you need into practical reference charts based on what’s actually available from Malaysian suppliers.

How PVC Pipe Is Sized

In Malaysia, PVC pipe is described by two key measurements working together:

Nominal diameter: The size quoted (e.g. 4″ or 110mm). This roughly corresponds to the bore and is what determines fitting compatibility.
Pressure class: The class (B, C, D, or E) determines the wall thickness. For the same diameter, a higher class means a thicker wall and higher pressure rating.

This is why two pipes of the same diameter can have different wall thicknesses and weights – they’re different classes. Always specify both diameter and class when ordering.

Pressure Class Reference

Under the MS 628 standard (based on BS 3505), the pressure classes are:

Class	Pressure Rating	Wall Thickness	Typical Application
Class B	PN 6 (6 bar)	Thinnest	Low-pressure water, drainage
Class C	PN 9 (9 bar)	Medium	General water supply, irrigation
Class D	PN 12 (12 bar)	Thick	Higher-pressure water mains
Class E	PN 15 (15 bar)	Thickest	High-pressure applications

Class D and E are the most common for pressurised water systems, while Class B and C are widely used for gravity drainage and lower-pressure applications.

Common Size Range (Inch to mm)

PVC pipe in Malaysia is often referred to in inches, though the metric equivalent (mm) is the actual outer diameter. Here’s a conversion reference for common sizes:

Nominal Size (Inch)	Approx. OD (mm)	Common Use
¾″	~26 mm	Tap connections, small plumbing
1″	~33 mm	Residential water supply
1½″	~48 mm	Waste pipes, small drainage
2″	~60 mm	Household waste, vents
3″	~89 mm	Soil stacks, drainage
4″	~114 mm	Main drainage, sewerage
6″	~168 mm	Large drainage, stormwater
8″	~219 mm	Infrastructure sewerage
12″	~315 mm	Large infrastructure

Note: These are approximate outer diameters for reference. Exact dimensions vary slightly by manufacturer and standard – always confirm precise measurements with your supplier for critical fitting connections.

Standard Lengths & Jointing

PVC pipes in Malaysia are typically supplied in 6-metre standard lengths. Most come with an integral socket (spigot) formed on one end, which allows for two main jointing methods:

Solvent weld (glue joint): The pipe end is coated with solvent cement and pushed into the socket, chemically fusing the two into a permanent, leak-free bond. Most common for pressure pipes.
Rubber ring joint: A rubber seal inside the socket allows the pipe to be pushed in for a flexible, watertight connection. Common for larger drainage and sewerage pipes.

For a full walkthrough of both methods, see our guide on how to glue and join PVC pipe.

How to Order Without Mistakes

When requesting a quote, always state three things together: Diameter (inch or mm) + Class (B/C/D/E) + Quantity/length.

Example: “4″ Class D PVC pipe, 6m lengths, 20 pieces.”

This ensures you get the exact wall thickness and pressure rating your project needs, with no ambiguity. Don’t forget to order matching fittings – see our PVC pipe fittings guide to plan your fitting list.

Conclusion

Accurate sizing is the foundation of any successful plumbing or drainage project. Using this chart, you can identify the right diameter, choose the correct pressure class, and specify your order precisely – avoiding mismatched fittings and under-rated pipe.

At NY Hardware, we stock PVC pipes from ¾ inch to 18 inches across all standard classes, certified to Malaysian standards. We also carry a complete range of fittings to match.