Threaded Foot Valves
Threaded foot valves are brass non-return fittings with a strainer and a spring-loaded disc, screwed directly onto the end of the suction pipe of small and medium-flow pumps. While the pump runs, the disc opens with the flow; when the pump stops, the spring presses the disc onto its seat and the water column in the suction pipe stays in place.
They are supplied with threaded connections from 3/4″ to 6″; the body is mostly brass and bronze on some models. The pressure class is PN10 or PN16 depending on the model. Besides standard disc types, full-bore spring valves to reduce suction resistance and models with a domed strainer are also available.
Main Applications
- Suction of garden and field irrigation pumps
- Jet and centrifugal pumps drawing from wells and cisterns
- Tank suction of residential booster sets
- Suction hoses of agricultural motor pumps
- Small industrial water transfer lines
Technical Data
| Connection | Threaded, screwed onto the suction pipe |
|---|---|
| Size | 3/4″ … 6″ |
| Body | Brass; bronze on some models |
| Pressure class | PN10 or PN16 (depending on model) |
| Disc | Spring loaded |
| Bore | Standard or full bore (depending on model) |
| Strainer | Attached to the body; flat or domed (depending on model) |
| Sealing element | Depending on model |
| Temperature limit | Depending on model |
| Media | Water |
| Installation | At the lower end of the suction pipe, vertical |
| Thread standard | Depending on model |
Material Options
| Part | PN10 · brass body | PN16 · brass body | Bronze body |
|---|---|---|---|
| Body | Brass | Brass | Bronze |
| Disc | Depending on model | Depending on model | Depending on model |
| Spring | Depending on model | Depending on model | Depending on model |
| Disc seal | Depending on model | Depending on model | Depending on model |
| Strainer | Depending on model | Depending on model | Depending on model |
Selection note: A threaded foot valve should be chosen in the same size as the suction pipe, and the connection threads should be wrapped with a suitable sealing tape to prevent air leaks; even a small air leak on the suction side stops the pump from priming.
Advantages
Screw-On Fitting
- Screws directly onto the suction pipe.
- No flange or gasket needed.
Brass Body
- Corrosion-resistant material.
- Long life in well and tank water.
Full-Bore Option
- Wide disc passage.
- Lower suction resistance.
Domed Strainer
- Larger strainer surface.
- Strainer clogs later.
Wide Size Choice
- From 3/4″ to 6″.
- Suits small and medium pumps.
Construction and Design Features
- Threaded brass or bronze body
- Spring-loaded non-return disc
- Strainer beneath the body
- Standard or full-bore disc design
- Flat or domed strainer options
Send the pump suction size, well or tank type and flow rate through the Request a Quote form; we will prepare the right threaded foot valve from stock.
How to Choose?
- Measure the suction sizeDetermine the pump suction port and suction pipe size.
- Check the pressure classChoose a PN10 or PN16 model according to the static head in the line.
- Choose the bore typePrefer a full-bore spring valve on long suction lines.
- Consider the strainerChoose a domed strainer model for tanks with leaf and sediment risk.
- Set the installation depthThe valve should stay below the lowest water level and well above the bottom.
Complementary Products
Why ORFA?
Other Foot Valves
Our Threaded Foot Valves
ORFA supplies threaded foot valves in a range of pressure classes, sizes and connection types to suit your application. Descriptions, technical specifications, materials and dimension tables are available on each detail page.
Get a quote for your project
Our sales team will prepare the best solution for your needs.