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Home > Diaphragm Pumps

Diaphragm Metering Pumps

Diaphragm metering pumps are the most popular pumps used for metering/pumping chemicals such as boiler chemicals, cooling tower chemicals, biocides, chlorine, etc.

The most popular diaphragm pumps are designed are Manual Pumps, 4 to 20 mAmp pumps, and Batch/Timed Pumps.
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Neptune PZ-31-VFC Neptune PZ-31 Chemical Metering Pumps
Neptune PZ-31-VFC Manual Pump -12 gpd at 145 psi.
Our Price: $465.00
Sale Price: $409.50
Savings: $55.50

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Neptune PZ-31 Manual Pump
Our Price: $535.00
Sale Price: $475.50
Savings: $59.50

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Chemical Metering Pump - Multiple options up to 250 psi
Our Price: $599.00
Sale Price: $533.00
Savings: $66.00
Neptune PZ-31-VFC Manual Pump -12 gpd at 145 psi. Neptune PZ-31 Pumps - 8 to choose from. Up to 11.4 gpd. Advantage Control Chemical Metering Pump - Up to 250 psi
Neptune Model PWP-31 Neptune Model PWM-31 Neptune Model PWT-31
Neptune PWP-31 (Pulse Control)
Our Price: $891.00
Sale Price: $757.00
Savings: $134.00
Neptune Pump PWM-31 (4 to 20 mADC Control)
Our Price: $990.00
Sale Price: $841.00
Savings: $149.00
Neptune PWT-31 (Timer/Batch Control)
Our Price: $1,027.00
Sale Price: $873.00
Savings: $154.00
Neptune PWP-31 Pumps - 5 to choose from. Up to 11.4 gpd. Neptune PWM-31 Pumps - 5 to choose from. Up to 11.4 gpd. Neptune PWT-31 Pumps - 5 to choose from. Up to 11.4 gpd.