HiFlo Valves
Why won't my Valve seal?
1. There may be something sitting between the diaphragm and diaphragm seating area. Pull the valve apart and clean out (replace diaphragm if damaged) as per assembly instructions.
2. Check to ensure you are using the correct size valve for your situation (See Which Foot Valve tab)
What temperature can I use a Hansen Check Valve at?
Hansen have tested all its products for use with cold water up to a maximum temperature of 60°C (140°F). We do not recommend the use of these products with temperatures higher than 60°C (140°F) as plastic expands due to temperature increases. Hansen cannot guarantee the products will perform when used with temperatures over 60°C (140°F). Hansen products that have failed in temperatures higher than 60°C (140°F) will not be covered by warranty.
Do I have to remove my valve from the line to service?
No. Your valve can be left in line for servicing. Click on the Installation & Assembly tab for further instructions.
I have noticed the Hansen Check Valve has a screw top, does this mean it can be serviced inline?

Yes the Hansen Check Valve can be serviced inline and any parts replaced if required. Click on the Installation & Assembly tab for further instructions.
I have a existing water line with a 40mm valve on it and I want to replace the valve with a Hansen valve. Do I use the same size valve as my existing one?
You will need to click onto the Which Check Valve tab and use these charts to determine the valve size required. In some situations you may be able to use a smaller Hansen valve than your existing non Hansen valve.
Can the Hansen Check Valves be used with salt water passing through them?
The spring in the valves is made of 302 grade stainless steel, and may eventually corrode in the salt water. The spring is available as a replacement part if required. All other parts of the valve are fully resistant to salt water.
Can I use my Hansen fittings with my swimming pool/spa pool set up?
No, as the high concentration of chlorine used in the water for pools will attack the material. The fitting material is only suitable for use with domestic water. Hansen products that are used in this application will not be covered by warranty.
I find my check valves too often not sealing, I’ve been told I should have a filter upstream of the valve, is this the same with the Hansen Check Valve?
All check valves should be screened upstream. The advantage of the Hansen Check Valve is that they can be serviced in line if your water is dirty.
How do I know what size valve to use?
Work out the flow rate of your pump (your pump supplier / installer can help you here) then click on Which Check Valve tab and use charts.