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Dolphin Amp Master Diamond External Marine Pump - 4750 GPH (Type-2)

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$449.99  


DP45002

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Dolphin Aquarium & Pet

Dolphin Amp Master Diamond Pump

  • Clean Pre filtered Marine/Fresh Water Pump
  • Lowest Amp Draw Marine Pump.
  • Very cool running Silent indoor or un protected outdoor use.
  • Circulates up to 4750 GPH All new engineering using fringe tech seals simply the best pump on Earth for Aquariums or Ponds.
  • Extremely compact out performing heavy bulky 2" pumps.
  • Built to consume the lowest amount of energy per gallon pumped.
  • Unique Seal engineered to perform @ 100% for life, and outlast all other pump seals on the market by many years.
  • Motor pad and 1.5" new super seal unions included.
  • Recommended for fish only saltwater tanks or ponds with salt added.
  • 2 Year Warranty/Lifetime Service Guarantee
Dolphin 4750 Graph

Seal Types
Type Application Description Warranty
Type 1 Freshwater Over double the work life expectancy
of other style freshwater seals.
10-year factory
service guarantee
Type 2 Marine Designed for pumping clean
non-abrasive marine water.
10-year factory
service guarantee
Type 3 Fresh, marine,
and any abrasive water
Designed for pumping water containing
abrasive sand and minerals.
Lifetime factory
service guarantee
Type 4 Fresh, marine,
and any abrasive water
Recommended for extreme abrasive environments
and where the pump will cycle on and off.
Lifetime factory
service guarantee



Manufacturer Info

Dolphin Aquarium & Pet
Dolphin Products cover a wide rang of pumps, aquarium and pond pharmaceuticals and supporting accessories. Each of the items are engineered to provide the best possible product to support your applications.

Dolphin is continually investing a large portion of income toward research and development and will continue to do so.

18 Reviews

Nick from Grosse Pointe Farms, MI UNITED

01/05/2016

Experience Level: Intermediate

Great Pump!!!

I recently decided to replace my Dolphin 4000/3000 pump....which is 10 years old and was still running w/o any issues...I never cleaned it but did utilize sponge pre-filter to keep debris from entering the pump. I'm only replacing it due to it's age. Pump is for 150 gallon reef aquarium with 13' - 15' head....sump is located in basement and display tank on 1st floor. All PVC hard piped. Very quiet pump and energy efficient....best warranty too! Dolphin customer service is great...available to talk when you call them for advice, etc. I had to go with 6250 Seal 3 type since they don't make my old pump anymore....a bit disappointed since the energy consumption will be more than my old pump, but thinking I'll have years of trouble free usage.

3 out of 3 found this review helpful

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RUSSELL RUTTER from SUWANEE, GA UNITED STATES

05/10/2015

Experience Level: Intermediate

Awesome Quiet Pump!

After researching the panworld, and iwakis and their noise levels, i concluded i wanted a dolphin. It took a couple days to break in but it got quieter and quieter. You can also use a ball valve to dial it back without any ill effects!

2 out of 2 found this review helpful

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Dave from Cumming, IA UNITED STATES

12/25/2014

Experience Level: Intermediate

Excellent experience so far

This pump replaced reefflo hammerhead that had "seized" after only 8 months of use. I have had no issues in 6 months of use on our 330 gallon system. This pump also has much less heat transfer then the hammerhead. I never needed a heater with the hammerhead due to the transfer (and was more concerned about the temp being too high). With the Dolphin we have had to add a heater due to much less heat transfer. Great experience so far.

3 out of 5 found this review helpful

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EBRYANT from PISMO BEACH, CA UNITED STATES

05/31/2014

Experience Level: Intermediate

Excellent!

I have two Dolphin Amp Masters running my 330g mixed reef. They are fairly quiet and energy efficient and the volume is incredible.

2 out of 2 found this review helpful

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SCOTT BRASSEUR from HASTINGS, MI UNITED STATES

12/20/2013

Experience Level: Intermediate

Excellent pump

Excellent product....performs as expected.

0 out of 2 found this review helpful

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JAMES H WALKER from LAWTON, OK UNITED STATES

04/09/2013

Experience Level: Expert

Great Reef Tank Pumps

The Dolphin Amp Master Pumps are excellant main pumps for large systems. i have used them for over 6 years with only 2 seal replacements in that time. The last pump was purchased as a spare pump to allow cleaning and repairs. Great equipment.

2 out of 2 found this review helpful

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MIRA FLOWERS from ASHEVILLE, NC UNITED STATES

04/02/2013

Experience Level: Expert

Response to Astolfo Rueda

In line micron filters are filters with very fine openings to remove the finest suspended particles in sterile pool water, not biological systems, due to rapid plugging with bio slime. They require pumps able to run at higher pressures such as the Dolphin aqua sea models, not any amp master pump which are designed to silently and efficiently move water at low pressures. Any system that incorporates a micron filter can not be an energy efficient system and therefore can not be operated with the ultra efficient amp master pumps. This person's problem is not the pump, it's his knowledge of filtration. This is a great pump with a plethora of industry uses. It is a rising star in aquaponics! I think I have called this company more than I call my mother asking questions, and they never tire of hearing from me or answering some heavy technical questions.

9 out of 9 found this review helpful

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WILLIAM BURKE from LOS ANGELES, CA UNITED STATES

08/13/2012

Experience Level: Expert

Dr B

Did an unbelievable job

1 out of 2 found this review helpful

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ASTOLFO RUEDA from Bainbridge Island, WA UNITED S

07/19/2012

Experience Level: Intermediate

Why just one star

I have 2 GE 1 in. High Flow Clear WH System inline filters one with a 10 micron and the other with a 5 micron filters and NOTHING else connected to this pump Dolphin Amp Master Diamond Freshwater/Marine Abrasive Proof 100 Pump - 6250 GPH (Type-4) and it can push more than 30G an hour! It replaced a ¾hp Seahorse now that is a pump the same filters, same plumbing and it was doing 2000GPH with clean filters 1200-1000 as they got dirty. I have a flow meter with its NIST certificate and recently calibrated and recertified. It was off by 0.00238 Litters Per Hour. I do not get how people can rave about it. Yes I reduced the outtake to 1 inch and that should have brought the water flow down to 4000gl and hour but to less than 30GPH? This pump is NOT a 6250 GPH even when measuring at the outtake spitting water to the air (tested in my pool) I am completely disappointed at it. Yes it uses less power than the Seahorse but the Gallon per Watt ratio is way higher!

6 out of 29 found this review helpful

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THOMAS PEDIGO from BRADENTON, FL UNITED STATES

03/13/2012

Experience Level: Intermediate

PUMP

This is a great pump for any large aquarium.

2 out of 2 found this review helpful

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