Washdown separators
Efficient removal of silt
Efficient removal of silt
Eco-responsible
Eco-responsible
Built to last
Built to last
Easy to maintain
Easy to maintain
What is a washdown separator?
A washdown separator is specifically designed to remove silt and debris from water run-off. They are typically installed at car wash facilities and equipment pressure washing facilities.
As the washdown separator fills with contaminated water, sediment such as silt and other debris such as dirt and dust, settle at the bottom of the tank below the invert of the pipe. When the water level reaches the outlet pipe, it safely leaves the separator and continues to the drainage system - leaving all forms of sediment at the bottom of the tank.
If required, a silt trap can also be installed upstream of the washdown separator to limit any potential blockages, damage or flooding in the tank.
The Environment Agency requires that discharge from washdown applications must discharge to a foul drainage system.
Example applications
- car washes
- pressure washing facilities
- transportation depots
- car dealerships
- truck dealerships
- farm equipment dealerships
How do washdown separators work?
Step 1
Contaminated water enters the unit where the heavier solids and silt settle to the bottom of the tank.
Step 2
The lighter liquids and hydrocarbons will rise to the surface and be retained within the tank.
Step 3
Treated water will exit the separator via the outlet.

Washdown separators maintenance
We have a network of local service partners to maximise the life of your Rewatec washdown separator and to provide years of reliable operation.
Our washdown separator warranty
For over 50 years, we have proudly developed sustainable and long-lasting products that make a real difference for our customers, our professional partners, and, above all, our planet.
Our experience in the industry allows us to give you a complete 25 year warranty for Rewatec washdown separators.
Washdown separator guides and manuals
Technical information
Our range of Rewatec washdown separators are available in 2,000 to 10,000 L capacities, with one, two or three chambers.
Training programmes
At Premier Tech we provide a full range of training programmes to fully meet the requirements of our professional partners. If you require product functionality guidance or a more detailed training course for installations, we can provide a solution to meet your needs.
Available products
We offer single stage washdown separators as standard however two and three chamber separators are available if required.

- GRP cylindrical tanks
- Below ground installation
- 2,000 litres to 10,000 litres capacities

- Installed for smaller applications
- Can be added 'upstream’ to a washdown or forecourt separator
- Varying grades of grated covers are available

Free quote
We are here to help. Request a quote today and our team of experts will be in touch.