Dolphin Amp Master Diamond External Marine Pump - 4750 GPH (Type-2)
Dolphin seals are custom designed and engineered to outperform and outlast all other pump seals on the market. Dolphin recommends type 3 abrasive proof seals for all reef and coral containing marine aquariums since these marine environments are all considered abrasive. The type 3 seals are designed to handle this environment with the reliability of a magnetic drive pump without all the drawbacks, such as heat transfer, noise, and energy consumption. All of our type 3 and diamond type 4 sealed amp master pumps include a 3-year factory warranty. For freshwater use the new fringe tech series type 2 seal design and surfaces are designed to provide a much longer service life than any other fresh water pump.
|Type 1||Freshwater||Over double the work life expectancy
of other style freshwater seals.
|Type 2||Marine||Designed for pumping clean
non-abrasive marine water.
|Type 3||Fresh, marine,
and any abrasive water
|Designed for pumping water containing
abrasive sand and minerals.
|Type 4||Fresh, marine,
and any abrasive water
|Recommended for extreme abrasive environments
and where the pump will cycle on and off.
| Lifetime factory
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.
Most orders under $29 ship for only $2.99 using a mix of economy shipping methods including UPS Ground, USPS First Class, and/or SurePost. Your order will be delivered in 1-7 business days after it ships out.
We ship 99% of the products we carry for free within the contiguous United States using a mix of economy methods including USPS First Class Mail, SurePost and UPS Ground. Your order will arrive in 1-7 business days. Just spend $29 or more!
Over 90% of shoppers receive their orders within 2 business using UPS Ground. Upgrade from free economy shipping to UPS Ground for only $2.99—or spend $250 and we’ll upgrade you automatically!
Expedited shipping services are available for most products if you are in a hurry. Get guaranteed delivery in 2 business days, 1 business day, or next day by 10:30 am. Costs vary by location.
Same-day shipping is available Monday-Friday for most products—place your order by 10:30 am PST. Pre-ordered and back-ordered items do not qualify, nor do drop-shipped, live, or frozen shipments.
We ship live plants, live foods, and frozen foods within the contiguous United States. Each of these categories is subject to its own $19.99 flat-rate shipping fee to cover the special packaging and/or expedited shipping costs required to ensure safe delivery. Orders with 12+ live plants ship free!
Return any new and unused item within 60 days for a full refund. Having difficulty with a product? Contact us to speak with an aquarium expert. If you need a replacement, fill out this form.
A small segment of the 180+ brands we carry require that customers contact them directly if/when problems arise. You can view the full list of those brands and get their contact info here.
We are unable to accept returns of Digital Aquatics, Neptune Systems, Vertex Aquaristik, Aqua Illumination (AI), EcoTech Marine, GHL, or Seneye products once the manufacturer's packaging seals have been broken.
Marine Depot is an authorized reseller for every product we carry. That means when you buy aquarium supplies from us, your products are not only backed by our own 60-day return policy, they also carry full factory warranties, where applicable. Some items have a 1-year warranty, others have limited lifetime warranties. Warranty coverage varies from manufacturer to manufacturer, so please read the product description of the item(s) you are considering thoroughly for details or contact us if you have warranty questions.
Rack up reward points to earn discounts on future purchases! You can earn reward points by creating an account, writing reviews, referring friends, subscribing to our newsletter, buying products, and more!
You can also get bonus reward points by purchasing select items during special sales and promotions.