OASE Waterfall Pump 8000 – 8000 GPH High-Flow Submersible Pond & Waterfall Pump for Large Water Features
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The Oase Waterfall Pump 8000 (SKU 45426) is a high-flow asynchronous submersible pump delivering 8,000 GPH with a maximum head height of 32 feet — engineered specifically for large pond waterfalls, long stream runs, and pond-free waterfall systems. At 600 watts and 4.8 amps, it provides exceptional energy efficiency for its flow class. The asynchronous motor design features a replaceable corrosion-resistant rotor (exclusive to the 6600 and 8000 models within the Waterfall Pump series) that resists scale and degradation in hard water conditions. The integrated grounding plate eliminates any chance of stray current entering pond water. Tool-less volute removal provides fast, no-tool access to all moving parts for cleaning and maintenance. An exclusive feature of the 6600 and 8000 models: inline installation capability allows the pump to be installed submerged or dry in an external vault. Includes 1.5”–2” step adapters. 20 ft power cord. 3-Year Warranty (2 years + 1 year with free online registration). Not for swimming pools or salt water. GFCI required.
Why Choose the Oase Waterfall Pump 8000?
- 8,000 GPH with 32-foot max head — true large-waterfall performance: Maintains strong, visually impressive water curtains on large backyard waterfalls and long stream runs, with enough head pressure to maintain flow even at significant elevation rises.
- Asynchronous motor with replaceable corrosion-resistant rotor: Unlike the smaller Oase Waterfall Pumps (1650–5150, which use synchronous magnetic motors), the 6600 and 8000 use an asynchronous design with field-replaceable rotors. When the rotor eventually shows wear from hard water mineral deposits, replace it — not the entire pump.
- Excels in hard water conditions: The Oase Waterfall Pump series is specifically engineered to maintain performance in mineral-rich water where competing pumps experience accelerated scale buildup and bearing degradation.
- Integrated grounding plate — unparalleled electrical safety: Eliminates any chance of stray electrical current entering pond water — critical for koi ponds and water features where people or pets come in contact with the water.
- Submersible or inline (exclusive to 6600 and 8000): The only models in the Waterfall Pump series that can be installed dry in an external pump vault or skimmer box, reducing heat transfer to the pond and enabling easier access for seasonal maintenance.
- Tool-less volute removal: Remove the pump housing to access the impeller and rotor without a single tool — a maintenance speed advantage over competing designs that require disassembly tools.
- Smaller cord plug for discreet placement: The compact plug size allows installation inside tight skimmer boxes and pump vaults without requiring oversized access openings.
Technical Specifications
| Specification | Detail |
|---|---|
| SKU / Item | 45426 |
| Max Flow Rate | 8,000 GPH |
| Max Head Height | 32 ft |
| Wattage | 600W |
| Amps | 4.8A |
| Voltage | 120V / 60Hz |
| Horsepower | 1 hp |
| Cord Length | 20 ft (compact plug for discreet placement) |
| Outlet | 2” MIPT |
| Inlet | 2” |
| Included Adapters | 1.5”–2” step adapters (2 included) |
| Motor Type | Asynchronous — with replaceable corrosion-resistant rotor |
| Installation | Submersible or inline (inline exclusive to 6600 and 8000 models) |
| Dimensions | 11.9”L × 6.8”W × 8.6”H |
| Weight | ~14.5 lbs |
| Safety | cULus Listed • Integrated grounding plate |
| Not Approved For | Swimming pools • Salt water • GFCI-protected 120V outlet required |
| Warranty | 3-Year Limited (2 years + 1 year with free online registration) |
Oase Waterfall Pump Family — Choose by Flow Rate
Note: Models 1650–5150 use a synchronous magnetic-drive motor with self-cooling back-spitting and are submersible only. Models 6600 and 8000 use an asynchronous motor with replaceable rotor and support inline installation.
| Model | SKU | Max Flow | Max Head | Watts | Motor | Install |
|---|---|---|---|---|---|---|
| Waterfall Pump 1650 | 45421 | 1,650 GPH | — | — | Synchronous | Submersible |
| Waterfall Pump 2300 | 45422 | 2,300 GPH | — | — | Synchronous | Submersible |
| Waterfall Pump 3700 | 45423 | 3,700 GPH | — | — | Synchronous | Submersible |
| Waterfall Pump 5150 | 45424 | 5,150 GPH | — | — | Synchronous | Submersible |
| Waterfall Pump 6600 | 45425 | 6,600 GPH | — | — | Asynchronous | Sub. or inline |
| Waterfall Pump 8000 (this) | 45426 | 8,000 GPH | 32 ft | 600W | Asynchronous | Sub. or inline |
Frequently Asked Questions
What is the maximum flow rate and head height for the Oase Waterfall Pump 8000?
The Oase Waterfall Pump 8000 (45426) delivers 8,000 GPH at open flow (0 ft head) and has a maximum head height of 32 feet. For reference, at 10 feet of head the pump delivers approximately 6,700 GPH, and performance continues to decrease as head height increases — standard behavior for asynchronous pump designs.
For waterfall installations: a general rule is to size the pump to deliver your desired GPH at the actual head height of your installation (measured from pump water surface to the top of the waterfall). Contact us at (765) 508-4352 for help calculating your system head and selecting the right pump size.
Can this pump handle pond debris and solids?
The Oase Waterfall Pump 8000 can pass coarse debris particles through the impeller chamber — particles up to approximately ¼ inch can move through the pump to a downstream filter. However, this is a waterfall pump, not a filter pump: it is designed to move water (and incidental debris) to a filtration system, not to filter the water itself.
For optimal performance and pump life, pair with a mechanical pre-filter, skimmer basket, or pump vault intake screen to capture larger debris before it reaches the impeller. The Oase Waterfall Pump 8000 is ideal for installation inside a skimmer box or pump vault where pre-screening is built in.
Is the Oase Waterfall Pump 8000 energy efficient for 24/7 use?
Yes. The Oase Waterfall Pump 8000 consumes 600 watts at full load. At continuous 24/7 operation, annual energy consumption is approximately 5,256 kWh, or roughly $630/year at national average electricity rates.
The asynchronous motor design is highly efficient for its flow class. The 6600 and 8000 models also feature a replaceable corrosion-resistant rotor that maintains motor efficiency over the long term by allowing worn rotor components to be replaced rather than degrading pump performance over time.
What safety features does this pump offer for fish ponds?
The Oase Waterfall Pump 8000 includes an integrated grounding plate that eliminates any chance of stray electrical current entering pond water. This provides state-of-the-art protection for fish, people, and pets who may come in contact with the water — a critical safety feature for koi ponds.
The pump must be connected to a GFCI-protected 120V outdoor outlet for additional protection. It is not approved for use in swimming pools or salt water.
What are the inlet and outlet sizes, and can this pump be installed inline?
The Oase Waterfall Pump 8000 features a 2” MIPT threaded outlet and a 2” inlet. Two step adapters (1.5” and 2”) are included in the kit for connection to common kink-free tubing and flexible PVC sizes.
The 8000 is one of only two Oase Waterfall Pump models (along with the 6600/45425) that can be installed inline (dry) or submerged. The smaller Waterfall Pump models (1650–5150) are submersible only. Inline installation places the pump in an external vault outside the pond — useful when reducing heat transfer to the pond is a priority, or when placement in a dry skimmer box is preferred.
How does maintenance work on the Oase Waterfall Pump 8000?
The Oase Waterfall Pump 8000 features tool-less volute removal — the pump housing that contains the impeller can be removed without any tools, giving you direct access to all moving parts for cleaning, inspection, and component replacement.
The asynchronous motor design also includes a replaceable corrosion-resistant rotor (exclusive to the 6600 and 8000 models). Over years of operation in hard water, rotor components may accumulate mineral deposits that reduce efficiency. Rather than replacing the entire pump, the rotor can be swapped out — significantly extending the pump’s service life and reducing long-term maintenance costs.
Why Buy Oase Products from Pond Pro Direct?
- Authentic Oase products with 3-year warranty support and parts availability
- Pump sizing expertise — call for waterfall GPH calculations, head pressure estimates, and Oase pump selection guidance
- Price Match on identical products from authorized Oase retailers
Oase Waterfall Pump 8000 (SKU 45426) — 8,000 GPH | 32 ft max head | 600W | 4.8A | 120V | 1 hp | 20 ft cord | 2” MIPT | 1.5"–2" adapters | asynchronous | replaceable rotor | grounding plate | tool-less maintenance | submersible or inline | 11.9"×6.8"×8.6"H | 14.5 lbs | cULus | 3-year warranty (2+1 registration). Not for pools/salt water. GFCI required.
Questions about waterfall pump sizing, head pressure calculations, or skimmer box compatibility? Call or text (765) 508-4352 — Monday through Friday, 9 AM to 5 PM EST.
Price Match
At Pond Pro Direct, we want you to shop with confidence, knowing you’re always getting a good deal.
We will match or beat the lowest online price on its products.
If you find a lower price for any products on our store, we will beat it by $50 for products listed over $2000. In order to be eligible, you must provide proof, whether a screenshot, invoice, email, etc. of the lower offer.
Please note that this does not apply to every product in the store, so reach out via email or chat for confirmation before purchasing.
For the policy to apply, simply send us a screenshot, link, or any other proof of the lower price.
For more information, please check out Price Match Policy Page
Shipping & Delivery
Order Processing
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Processing times may vary by brand, item type, fulfillment method, and whether an item is made to order or ships via freight.
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If your order is in stock and payment is processed, it will typically ship within 6–13 business days. Once your order ships, tracking information (when available) will be sent to the email address provided at checkout.
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Shipping Times
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- Typical handling time: 1–5 business days
- Typical transit time after shipment: 5–8 business days
- Estimated delivery window: 6–13 business days
Delivery timelines may vary based on brand, item type, production status, freight requirements, and carrier availability.
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Available shipping options vary by product and location.
Our standard Curbside Delivery option is provided at no additional cost where applicable and delivers the item to the curbside or driveway of the delivery address.
Additional options, such as Threshold Delivery or White Glove Delivery, may be available for select products and locations.
For full details regarding freight delivery, inspection requirements, liftgate service, returns, and customer responsibilities, please review our full Shipping Policy page.
Returns & Refunds
Cancellations & Refunds
Orders may be canceled free of charge before shipment, unless the item is classified as Custom or Made-to-Order (see below).
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If you need to cancel an order before it ships, please contact us as soon as possible. Orders canceled prior to shipment are eligible for a full refund.
You can reach our team by phone at (765) 508-4352, via live chat on our website, or by email at support@pondprodirect.com.
Cancellations (After Order Ships)
Once an order has shipped or entered fulfillment, it may no longer be eligible for cancellation. If you no longer wish to keep the item, you must wait until delivery and then request a return.
A Return Merchandise Authorization (RMA) is required before returning any item.
Custom or Made-to-Order Items
Custom or made-to-order products are produced specifically for your order and cannot be canceled or refunded once production has begun, except in cases of defect or error.
Product pages will clearly indicate when an item is custom or made-to-order. If you are unsure whether an item falls into this category, please contact us before placing your order.
Returns & Refunds
Returns are subject to the following conditions:
- Customers have 30 days from delivery to request a return, unless otherwise stated on the product page or by manufacturer policy
- Items must be unused, uninstalled, and in original packaging
- An RMA is required prior to returning any item
Because we ship products directly from manufacturers, return eligibility may vary by brand. If a manufacturer does not permit returns on a specific product, we may be unable to accept the return. Please contact us if you would like confirmation of return eligibility for a specific item.
Fees & Shipping Costs
- Return shipping costs are the responsibility of the customer unless the item is defective or shipped in error
- Freight / LTL shipments may incur higher return shipping costs due to carrier fees
- Approved returns of non-defective items may be subject to a restocking fee of up to 25%
- Original outbound shipping charges are non-refundable
If you are exchanging an item rather than returning it outright, we may be able to assist with some costs depending on the product and manufacturer.
For full details, including freight deliveries, damage reporting requirements, and manufacturer-specific terms, please review our complete Return and Refund Policy
