---
title: Emptying grey and black water tanks in a TrailLite
description: This article and video explain how to empty your grey and black water tank in a TrailLite motorhome
---

[Skip to content](https://knowledge.traillite.co.nz/en/knowledge/lesson-fourteen#main-content)

English

Show submenu for translations

![TrailLite Group\_Primary\_Gold\_RGB-1.png\]](https://knowledge.traillite.co.nz/hs-fs/hubfs/TrailLite%20Group_Primary_Gold_RGB-1.png?height=40&name=TrailLite%20Group_Primary_Gold_RGB-1.png)

- [The TrailLite Blog](https://blog.traillite.co.nz/)

Open main navigation

Close main navigation

- [The TrailLite Blog](https://blog.traillite.co.nz/)
- English
  
  Show submenu for translations
- [Go to www.traillite.co.nz](https://www.traillite.co.nz/)

[Go to www.traillite.co.nz](https://www.traillite.co.nz/)

 Hello. What can we help you with today?

- There are no suggestions because the search field is empty.

1. [Help Centre](https://knowledge.traillite.co.nz/en/knowledge?hsLang=en)
2. [TrailLite Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/traillite-information-and-guides?hsLang=en)

# Emptying grey and black water tanks in a TrailLite

## This article and video explain how to empty your grey and black water tank in a TrailLite motorhome

**Instructions - grey water tank:**

- Remove the lid on the grey water outlet and attach the grey water hose (ensure it is all the way clicked in).
- The greywater hose is in the side exterior locker. This is a dedicated waste management locker - [click here to learn more.](https://knowledge.traillite.co.nz/knowledge/lesson-thirteen-traillite-lockers?hsLang=en)
- Then open the valve by pulling out the handle.
- Once drained, close the valve by pushing the handle back in, detach the hose and attach the lid.

<iframe class="hs-responsive-embed-iframe" height="315" src="https://www.youtube.com/embed/UFFaSxmHeh4" style="position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: none;" width="560" allowfullscreen data-service="youtube"></iframe>

 

**Instructions - black water tank:**

- Remove the lid on your black water outlet and attach the black water hose (ensure it is all the way clicked in).
- Then open the valve by pulling out the handle.
- Once drained, you are able to drain the grey water tank through the black water tank. Leave the hose attached and then open the valve between the grey and the black water tank by turning on the MACERATOR button on the CZone.
- **Please Note: It is important that the black water tank is empty before you do this to avoid flooding of the tanks.**
- The greywater will then be drained through the black water tank and will rinse it at the same time.
- Once drained, close the valve by pushing the handle back in.
- Detach the hose and attach the lid.
- Then close the valve between the tanks by turning off the MACERATOR button on the CZone.
- **Please Note: The MACERATOR function does not macerate (waste is macerated while being flushed into the black water tank) it operates the valve between both tanks and the pump.**
- You can also drain each tank separately.

**Troubleshooting:**

[What to do if your grey water tank isn't reading levels correctly](https://knowledge.traillite.co.nz/knowledge/what-do-i-do-if-my-water-tank-monitoring-isnt-reading-correctly?hsLang=en)

 

- [General Help and Information](https://knowledge.traillite.co.nz/en/knowledge/general-help-and-information?hsLang=en)
- [TrailLite Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/traillite-information-and-guides?hsLang=en)
- [Benimar Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/benimar-information-and-guides?hsLang=en)
- [Fusion Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/fusion-information-and-guides?hsLang=en)
- [Mobilvetta Information and Guides](https://knowledge.traillite.co.nz/en/knowledge/mobilvetta-information-and-guides?hsLang=en#main-content)

    - [KP model](https://knowledge.traillite.co.nz/en/knowledge/mobilvetta-information-and-guides?hsLang=en#kp-model)
    - [Both models](https://knowledge.traillite.co.nz/en/knowledge/mobilvetta-information-and-guides?hsLang=en#both-models)

[![Chill listening crop-3](https://knowledge.traillite.co.nz/hs-fs/hubfs/TrailLite%20Group_Primary_Gold_RGB-2.png?width=200&height=49&name=TrailLite%20Group_Primary_Gold_RGB-2.png "Chill listening crop-3")](http://traillite.co.nz)

Contact our friendly service teams for more information or assistance.  
Pukekohe: 09 237 0187 | 15 Alpito Place, Pukekohe.  
Christchurch: 03 222 2067 | 10 Innovation Road, Islington.

**Email** - Service [Service@TrailLite.co.nz](mailto:Service@trailLite.co.nz) or Parts [parts@TrailLite.co.nz](mailto:parts@TrailLite.co.n)

 

Copyright © 2026, TrailLite Group