Iwaki Aquarium Pumps
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Iwaki

WMD or MD?
  • Most Iwaki pumps are available with either an American motor (WMD models), or a Japanese motor (MD models).
  • The WMD (American) models feature an American made motor and polypropylene adapter bracket while the MD (Japanese) models feature a Japanese motor and aluminum adapter bracket.
  • The WMD & MD models are identical in terms of performance and life-expectancy.
Product Features
  • Thermal cut-off switch shuts off the motor if it becomes too hot. This is a great safety feature.
  • Precision-machined spindle helps insure proper impeller alignment and quiet operation.
  • Unique internal cooling circuit helps to cool the pump and prevent heat transfer into the water.
  • Offers low heat exchange and quiet operation.
  • Comes with 1-year warranty against parts and workmanship.
  • These are very reliable pumps that often last 3-4 years with proper maintenance.
  • RLT models are pressure pumps for applications requiring more pressure, or head, such as pushing water through a canister filter or pumping water higher.
  • RLXT models are high flow pumps for circulating water through a filter system.

Iwaki MD Pumps (Japanese Motor)

Model Watts Connections
MD 20 RLT 58 Hose 5/8” NPT ¾”
MD 20 RLXT 60 Hose 1” NPT 1”
MD 30 RLT 96 Hose ¾” NPT ¾”
MD 30 RLXT 132 Hose 1” NPT 1”
MD 40 RLT 156 Hose ¾” NPT ¾”
MD 40 RLXT 144 Hose 1” NPT 1”
MD 55 RLT 192 Hose 1” NPT 1”
MD 70 RLT 336 Hose 1” NPT 1”
MD 100 RLT 408 Hose 1” NPT 1” 

Iwaki WMD Pumps (American Motor)

Model Watts Connections
WMD 20 RLT 58 Hose 5/8” NPT ¾”
WMD 30 RLT 120 Hose ¾” NPT ¾”
WMD 40 RLT 114 Hose ¾” NPT ¾”
WMD 40 RLXT 114 Hose 1” NPT 1”

Iwaki MD Pumps (Japanese Motor)

Model Max Flow Max Head
MD 20 RLT 492 gph 14.1 ft
MD 20 RLXT 822 gph 8.2 ft
MD 30 RLT 600 gph 17.7 ft
MD 30 RLXT 1140 gph 13.5 ft
MD 40 RLT 822 gph 21.3 ft
MD 40 RLXT 1344 gph 15.4 ft
MD 55 RLT 1104 gph 26.9 ft
MD 70 RLT 1536 gph 31.8 ft
MD 100 RLT 2136 gph 39 ft 

Iwaki WMD Pumps (American Motor)

Model Max Flow Max Head
WMD 20 RLT 492 gph 14.1 ft
WMD 30 RLT 600 gph 17.7 ft
WMD 40 RLT 822 gph 21.3 ft
WMD 40 RLXT 1344 gph 15.4 ft