EcoLet™ How to Start your System

If you have just purchased an Ecolet™ system, then this guide on how to start up your system is for you.

Once your Ecolet™ system is fully installed and the ventilation system is running, you need to add a starter bed before the system can be used. Use only WCTNZ®-approved bulking agents: WCT | Eco Mix 40 and WCT | Eco Mix 20 (Quick Bag). Keep the fan running to draw off odour and supply oxygen. 

Ecolet™ 240 Range – Models Automatic 25a & 65a

Step-by-step guide

First, acquire your bulking agent (carbon material). These are supplied and approved by WCTNZ®. We recommend WCT | Eco Mix 40 as the starter-bed material (bulking agent) because it is engineered for high moisture uptake, airflow, and reliable compost initiation in Ecolet™ systems. Only use WCTNZ®-approved bulking agents to ensure performance and support eligibility.

Step-by-step guide

1. Fill the composting chamber to the necessary level. Open the chamber-screen by pressing the toilet seat down, then add WCT | Eco Mix 40 so it reaches 10cm below the top mixer arm.
2. Add microbes. Use WCTNZ® | Microbiota MicrobeBURST™ as per the pack instructions. 
   Moisten the starter bed. Add about 1L of water across the surface to wet out the mix and encourage microbial activity. 
3. Mix the pile. Close the lid so the mixer completes a cycle. Repeat 2–3 times to distribute the blend (automatic models cycle when the seat is used/closed). 
4. Set ventilation and heat. Default to fan only (green light). Adjust heater as needed according to usage and season:
    • Green = fan only
    • One amber = 30%
    • Two ambers = 60%
    • Three ambers = 100%

Note;

• Some starter-bed material falling into the tray is normal. Do not empty the tray early just because material has dropped through during startup.
• Always keep the fan on to maintain airflow and odour control.

Ecolet™ Separera Mini (UD-S and UD-C)

Step-by-step guide

1. Remove the top of the pedestal housing. Ensure the compost chamber is properly placed inside the pedestal. Line with a compostable bag if desired.
2. Add starter bed to the bottom of the empty chamber: place an even 50mm spread of WCT | Eco Mix 40 or WCT | Eco Mix 20 (Quick Bag).
3. Return the top of the housing—Ecolet™ Separera Mini is ready to be used.
4. Repeat these steps each time a new empty chamber is started.

Note;

• Separera models typically do not require microbe dosing, although microbes are beneficial for long-term composting; use WCTNZ® | Microbiota MicrobeBURST™ if desired, follow instructions on the pack.
• Always run the fan for airflow and odour control. 
• Do not put any bulking agent down the urinal, as this can block the urine pipe. Use a compatible eco-urinal cleaner periodically to keep the line odour-free.

Important!

Using approved WCTNZ® Bulking Agent WCT | Eco Mix 40 or WCT | Eco Mix 20 for best proformace.

WCTNZ® | Waterless Composting Toilets NZ Limited | Copyright 2026 ©