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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 Neptune PZ-31-VFC Chemical Metering Pumps
Neptune PZ-31 Manual Pump
Our Price: $635.00
Sale Price: $529.50
Savings: $105.50
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(1)
Neptune PZ-31-VFC Manual Pump -12 gpd at 145 psi.
Our Price: $595.00
Sale Price: $529.50
Savings: $65.50
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(2)
Chemical Metering Pump - Multiple options up to 250 psi
Our Price: $649.00
Sale Price: $586.00
Savings: $63.00
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Neptune PZ-31 Pumps - 8 to choose from. Up to 11.4 gpd. Neptune PZ-31-VFC Manual Pump -12 gpd at 145 psi. 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: $991.00
Sale Price: $832.00
Savings: $159.00
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Neptune Pump PWM-31 (4 to 20 mADC Control)
Our Price: $1,090.00
Sale Price: $925.00
Savings: $165.00
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Neptune PWT-31 (Timer/Batch Control)
Our Price: $1,127.00
Sale Price: $960.00
Savings: $167.00
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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.