---
title: FAQ for Drain/Water/Sewer
description: "## **Question 1: How to let pipe/node numbers run after a prefix?** In MiTS, we can customise the marking of the pipes and nodes to our own preferences in the utility modules: Drain, Water and Sewer. Refer to the following…"
url: "https://mes100.com/docs/faq-for-drain-water-sewer/"
updated: "2026-10-12"
category: FAQ / Drain
---

# FAQ for Drain/Water/Sewer

## **Question 1: How to let pipe/node numbers run after a prefix?**

In MiTS, we can customise the marking of the pipes and nodes to our own preferences in the utility modules: Drain, Water and Sewer. Refer to the following blog post to learn the step-by-step on **[How to Customise Mark for Nodes and Edges in Utility Modules](https://mes100.com/docs/customizing-mark-for-nodes-and-edges-in-utility-modules/)**

![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/11/Screenshot-2023-11-10-151351.png?w=1080&ssl=1)

Default mark

![](https://i0.wp.com/mes100.com/wp-content/uploads/2023/11/Screenshot-2023-11-10-151514.png?w=1080&ssl=1)

Custom mark

## **Question 2: Why I Can’t Import Drain/Sewer/Water Pipe Successfully?**

When importing the drain/sewer/pipe, you might realize that it takes too long to import them into MiTS. Sometimes, it might take around 30 minutes to import the drain/sewer/pipe into MiTS, or longer. So, why does this happen?

Usually, this long time to import your drain/sewer/pipe is due to the type of line used to design them in the drawing. Sometimes, the drain/sewer/pipe layer designed in the drawing consists of numerous individual lines and some double lines. **The drain/sewer/pipe needs to be made up of polyline/single line and not double lines** – we don’t import the full 2D profile of the pipes, just the single line. Each polyline will be recognized as one drain/sewer/pipe.

Below is an example of a comparison between importing drain into MiTS from drawing with polyline drain and drawing with individual line and double line drain.

![](https://i0.wp.com/mes100.com/wp-content/uploads/2024/01/image-4.png?w=1080&ssl=1)

*Polyline Drain*

![](https://i0.wp.com/mes100.com/wp-content/uploads/2024/01/image-5.png?w=1080&ssl=1)

*Individual/Double Line Drain*

Project File:

**[Polyline Drain](https://largefilehosting.s3.ap-northeast-1.amazonaws.com/ProjectSharing/Client%20Project%20-%20Saiful/Drain%20OK.zip)**

**[Individual?Double Line Drain](https://largefilehosting.s3.ap-northeast-1.amazonaws.com/ProjectSharing/Client%20Project%20-%20Saiful/Drain%20Problem.zip)**

Drawing:

**[Polyline Drain](https://largefilehosting.s3.ap-northeast-1.amazonaws.com/ProjectSharing/Client%20Project%20-%20Saiful/polyline%20drain.dwg)**

**[Individual/Double Line Drain](https://largefilehosting.s3.ap-northeast-1.amazonaws.com/ProjectSharing/Client%20Project%20-%20Saiful/problematic%20dwg.dwg)**

(*Friendly note: The individual*/double line drain drawing’s video has been sped *up to 36 times while the polyline drain’s drawing is using a normal speed*)

*Polyline Drain*

*Individual/Double Line Drain*

### *Related*

 [![](https://i0.wp.com/mes100.com/wp-content/uploads/2024/10/me-small.jpg?resize=100%2C100&ssl=1)](https://mes100.com/author/admin/)[Ngu Soon Hui](https://mes100.com/author/admin/)

I’m the [Benevolent Dictator for Life](https://en.wikipedia.org/wiki/Benevolent_dictator_for_life) for MiTS Software cum Editor of this website. Read more [here](/about-ngu-soon-hui/).

You can also contact me at soonhui@mes100.com