---
title: Standard Manhole and Sump Sizes in Malaysia
description: "# Standard Manhole and Sump Sizes in Malaysia — What Designers Should Know This article summarizes the key standards, common dimensions, and practical recommendations setup based on Malaysian practice. --- # Circular Manholes — The Only Fully Standardized Category Circular…"
url: "https://civilwhiz.com/docs/standard-manhole-and-sump-sizes-in-malaysia/"
updated: "2025-10-31"
category: Networks
---

# Standard Manhole and Sump Sizes in Malaysia

# Standard Manhole and Sump Sizes in Malaysia — What Designers Should Know

This article summarizes the key standards, common dimensions, and practical recommendations setup based on Malaysian practice.

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# Circular Manholes — The Only Fully Standardized Category

Circular precast manholes are governed by **MS 881** (Precast Concrete Pipes and Fittings).

They are widely adopted by major manufacturers such as OKA, Hume, and Southern Precast.

Typical internal diameters include:

- **1000 mm**
- **1200 mm**
- **1350 mm**
- **1500 mm**
- **1800 mm**
- **2100 mm**

These dimensions are consistent nationwide and suitable for both sewer and stormwater applications.

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# Rectangular or Box-Type Manholes — Common but Not Codified

Rectangular manholes remain *non-standardized* at the national level. Designers typically refer to **JKR Standard Specifications**, older **MS 1228**, or consultant-specific drawings.

Common internal dimensions seen in practice include:

- **600 × 760 mm** (for depths ≤ 2 m)
- **900 × 900 mm** (for depths > 2 m)
- **1000 × 1000 mm**

These serve as *de facto* standards for inspection chambers and junction boxes, even though no official table exists in any Malaysian Standard.

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# Sumps and Catchpits — Semi-Standardized by Practice

Rectangular sump pits are guided by **MSMA (2nd Edition)** and **JKR Drainage Works Specifications**, supported by common manufacturer catalogs.

Typical internal dimensions include:

- **450 × 450 × 600 mm**
- **600 × 600 × 900 mm**
- **900 × 900 × 1200 mm**
- **1200 × 1200 × 1200 mm**

Depths typically range from **1.0 m to 1.5 m**, with sump pits **150–300 mm below outlet level**.
 Circular sumps are often created by repurposing **precast manhole rings** of **1050 mm or 1200 mm ID**, especially where hydraulic layout favors a circular structure.

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# Manufacturer Catalog Units — Small Precast Modules

Smaller sump modules appear in manufacturer catalogs from MS Pipe, CKC Concrete, and LTH Precast.
 Common units include **430×430×500 mm**, **450×450×600 mm**, and **600×600×900 mm**, often configurable in depth and cover type.

These are popular for housing or commercial projects with limited space.

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# Recommended Starting Sizes for Civil 3D / MiTS Catalog Setup

| Component | Suggested Sizes | Notes |
| --- | --- | --- |
| **Circular Manhole (ID)** | 1000, 1200, 1350, 1500, 1800 mm | Fully standardized — use MS 881 / SPAN TS© 02-1 values |
| **Rectangular Manhole** | 600×760, 900×900, 1000×1000 mm | Legacy JKR dimensions |
| **Rectangular Sump / Catchpit** | 450×450×600, 600×600×900, 900×900×1200 mm | Common practical sizes per MSMA |
| **Circular Sump** | 1050, 1200 mm ID | Derived from precast manhole rings |

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# Conclusion

- Only **circular precast manholes** are *officially standardized* in Malaysia.
- **Rectangular manholes** and **sumps** rely on common industry practice rather than MS.
- **Manufacturers** like OKA, CKC, MS Pipe, and LTH Precast offer flexible dimensions within these typical ranges.

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  [![](https://civilwhiz.com/wp-content/uploads/2025/02/someoneme.jpg)](https://civilwhiz.com/author/civilwhiz/)[Ngu Soon Hui](https://civilwhiz.com/author/civilwhiz/)

My passion is in [sharing knowledge](/about/) — Civil 3D or otherwise– with the world.

I’m also the [benevolent dictator for life](https://mes100.com/about-ngu-soon-hui/) at MES Innovation Sdn Bhd.