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Chemical Feed Pumps

Peristaltic Pumps #

  • Automatic degassing
  • Self-priming against pressure
  • Can prime up to 25 feet
  • No check valves in head
  • Can mount in any position
  • Interchangeable outputs with tube change
  • Peristaltic pumps, manufactured by Stenner, are typically used on smaller seasonal pools with lower loads.
  • It has been observed by CH and pool equipment suppliers in the industry that the Stenner dual-headed pumps (model 170DM5) are not as durable as their single-headed pumps (85M5).  For pools with higher chemical demands, multiple single-headed pumps should be used.
  • Dual-headed pumps use the same motors as the single-headed pumps with different variations in the gearing.  Dual-headed pump motors and the internal gearing does not stand up well to the additional strain placed on it by the additional load.

Diaphragm Pumps #

  • Requires optional degassing valve
  • Must manually prime
  • Primes 3 to 5 feet
  • Check valves prone to failure
  • Must change head direction
  • Must change drive and/or head
  • Diaphragm pumps, manufactured by LMI, are typically used on larger pools that run year-round and have higher loads.
    • LMI pumps have a higher PSI rating (150 PSI) when compared to Stenner pumps (100 PSI).  LMI pumps have a maximum 600 GPD rating while the largest Stenner pump is only capable of 170 GPD.
    • Chemical feed pumps should not be located directly over duplex outlets because of potential corrosion concerns if there is a leak.

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