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Function: It is installed at the bottom (foot) of the pump's suction line and performs two main tasks:
Check Valve: Allows water to flow upward towards the pump but prevents it from flowing backward (backflow) when the pump shuts off.
Prime Maintenance: By preventing backflow, it ensures the suction pipe remains full of water, thus keeping the pump primed and ready for the next start, preventing dry runs and potential damage.
Material: Made from Plastic (usually PVC or Polypropylene, often colored red for visibility/branding), making it lightweight, durable, and highly resistant to corrosion from water.
Price: