Work out the flow
rate of your pump (your pump supplier / installer can help you here) then
click on Which Foot Valve tab and use charts.
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 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 Foot 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.
The dam I’m pumping from can get quite dirty at times, including slime and weed, I find my existing foot valve requires constant cleaning. Will the Hansen Foot Valve solve this problem?
Yes the Hansen Foot Valve has been designed with the ability to work in dirty water situations and because of lower head losses of this valve you can select a smaller size than you normally would expect, thus with the higher velocities across the diaphragm the valve becomes self cleaning.
When choosing my Foot Valve do I select a valve size to match the suction pipe diameter?
No not necessarily, again because of the higher efficiencies of the Hansen Foot Valve you match your flow with the head loss your pump can afford, generally you will find the Hansen Foot Valve size will be less than the pipe diameter.
The river I pump from is fairly shallow so I do pump some sand at times and find my existing Foot Valves have to be replaced often. Is the Hansen Foot Valve also a throw away valve?
No, although pumping sand is unadvisable because of the damage to your pump. You will find with the screw cap service access to the Hansen Foot Valve you only need to replace the parts that wear in these circumstances. Another suggestion would be because the Hansen Foot Valve can be installed at any angle you may be able to install the Hansen Foot Valve vertically above your suction pipe and keep it above any sand.
Can the Hansen Foot 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.
What temperature can I use a Hansen Foot 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.