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9 Tips for Installing Self-Cleaning Filters

9 Tips for Installing Self-Cleaning Filters

Kevin Evans
Regional Sales Manager, Rocky Mountain States // 26 Jan. 2021

It’s finally time! Your new filtration system just arrived, and you can’t wait to have it installed. Before you get ready to start the installation, though, let us help make the process easier, and more importantly – make sure it’s done right the first time around.

We’ve seen a lot of installation mistakes, and compiled this list of 9 installation tips that can save you a lot of headaches later on.

9 Filter Installation Tips

These tips, in no particular order, can be used as your checklist during the setup phase, and make the whole process painless:

Tip 1 – Inlet & Outlet Valves

It’s important to install both an inlet and outlet valve in order to isolate the filter. The outlet valve will keep the backpressure on the filter while it’s filling the pipe with water. Adding the valves to the system will make maintenance on the filter easier.

Tip 2 – Upstream Pump Before Filter

You are most likely going to need a pump to maintain a regular flow and ensure the filter is working properly. Be sure to install the filter after any pump system you may have. The filter is designed to operate with the pump pushing water towards it.

Sigma-Pro and pumps installation
Sigma Pro and pumps installation

Tip 3 – Flush Flow Rate

To be able to flush all the contaminants that accumulate on the filter, it will need a specific flow rate. Consult our chart to verify the flushing flow rate of the filter you are installing:

Tip 4 – Downstream Minimum Pressure

Filters need to maintain the pressure on the downstream side of the filter. They are designed to filter with suction force from the downstream side. If the pressure is too low the filter won’t be able to operate correctly. If it’s too high, it can damage the filter. The EBS, SAF, and Filtomat series filters need a minimum of 2 bar (30 PSI) during flushing, and the Mini Sigma and Sigma Pro series require 1.5 bar (22 PSI) during flushingIt is also important that the differential pressure will be no more than 1 bar (15 PSI), otherwise, the filter will have a difficult time initiating a flush cycle, which leads us to tip 5:

Tip 5 – Flow Rate & Pressure Check

Review the flushing flow rate and pressure needed for the filter system. Make sure that the pump and its connection to the filter are both installed according to the specified parameters. For example, connecting a 4” pump to a 2” filter can hinder your flow rate. You can create a higher pressure or flow by using these two options:

  • Install a downstream on/off valve. This valve will seal when instructed by the filter controller when flushing is needed. When the valve seals, all the pressure and flow are directed to operation of the flush cycle
  • Install a pressure sustaining valve downstream of the filter. The valve is to be set to the specified pressure of the series of filter you have (see table below). When the flush cycle is initiated, the valve will hold back the pressure it is set to. This can also be helpful when filling the system with water at commissioning or after a maintenance procedure


Tip 6 – Size Matters

The flushing line/Exhaust of your filter needs the following parameters to do its job:

  • It must be open to the atmosphere. Make sure that the exhaust line is not submerged or on an incline. Any backpressure on the exhaust line will affect the cleaning cycle of the filter
  • Do not reduce the line size of the exhaust. The exhaust line needs to be a ridge pipe and not a lay-flat hose. Again, any backpressure will cause the filter not to flush properly
  • Upsize exhaust line from 50mm (1.5” to 2”) ridge pipe if the line is shorter than 6m (20 ft)
  • Upsize exhaust line to 80mm (3”) ridge pipe if the line is longer than 6m (20 ft)
  • Manifold flush lines with multiple filters are to be upsized to a 100mm (4”) ridge pipe

Tip 7 – Keep It Roomy

Ensure that you have enough room to perform maintenance around the filter. You will need to take the filter apart, and it is important to have enough clearance around the filter when you work on it.

Tip 8 – Manual Pressure Gauges

Install manual pressure gauges both upstream and downstream of the filter. This will help with troubleshooting the filter if needed. Knowing the pressure in the system will make it easier to determine how it is operating. if you have an Amiad ADI-P controller installed, you can see both pressures via the app and the gauges won’t be necessary.

ADI-P controller
ADI-P controller

Tip 9 – Check and Relief Valves

Consider adding check and relief valves to our installation:

  • Install check valve to prevent backpressure to the filter
  • Install air relief valves upstream or downstream of the Filtomat pistonless and Sigma Pro series. The Mini Sigma series will have a ¾” port for installing an air relief valve and Filtomat piston series will have an air relief valve already installed
  • The EBS and SAF filters have no room on them for relief valve installation. However, it’s recommended that you install a relief valve at the highest possible point on the line, as air will aspire to move upwards

And there you have it. 9 easy tips that will save you a lot of time and frustration during and after your filter installation. And here’s a bonus tip: if you’re unsure about any part of the installation process – it is better to contact us and ask us how to proceed, we will always be happy to support you.