- Cleaning with high pressure cleaner
Easy to assemble, install and maintain
The PURAIN Rainwater filter has a standardized DN pipe collar or spigot end ports for easy installation in the tank. (Note the height offset).
This filter requires extremely low maintenance in comparison to other self-cleaning rainwater filters due to the self-cleaning by means of hydraulic jump design as well as the sturdy construction of the wedge wire sieve.
The PR100 sieve should be checked about twice a year, to ensure that it is not heavily clogged. Should dirt or leaves be found in the tray they need not be removed as they will be flushed away with next heavy downpour. If water is accumulating in the try area, the sieve can be cleaned manually within a few seconds with a high pressure cleaner. This is done simply through entry via the tank lid. In doing so, even the debris accumulated between the trapezoidal bars is also removed safely. Alternatively, should the need arise, the sieve can also be removed.
The PR100 non-return valve is to be checked twice a year to remove any dirt or debris if present.
Backflushing nozzle
We recommend the use of a PR-100-RSDS backflushing nozzle for filters installed in hard to reach tanks.
The backflushing nozzle is installed into the PURAIN Rainwater filter, behind the sieve, and connected to a water pipe via a garden hose plug-in coupling. In this way, manual cleaning automated.
Tank Installation instructions
- The filter must be installed with a slope of 2 – 5 %.
- At least 100 cm of pipe should be inserted on the inflow side of the filter – this will help align the sieve with the centre of the tank to facilitate clear viewing and cleaning..
- For proper skimming with WSP-100, the filter must be installed without lateral tilt (filter sides must be level).
- A separate tank overflow is not to be installed.
- Accessibility to the filter is important for cleaning and maintenance of the sieve and the non-return valve.
- An intake settler (calming pot) on the floor of the tank, below the filter, prevents the sediment layer from being disturbed.
- A trap must be installed on the overflow side of the filter to prevent smell entering the tank from the sewer.
Safety instructions
- Never enter the tank without supervision or without safety measures. Never lean into the tank from the top! Always leave the tank inspection cover closed. Keep children away from the top of the tank!
