Evolution Aqua Varipump 20000 – 5,280 GPH Adjustable Flow Pond & Waterfall Pump
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Description
The Evolution Aqua Varipump 20000 (VP20) is a professional-grade, electronically adjustable pond pump delivering up to 5,280 GPH with an 18-foot maximum head. Powered by a quiet six-pole, three-phase motor with sinusoidal wave technology, the VP20 runs at near-silent levels at any flow setting — a key advantage for koi keepers and discerning backyard pond enthusiasts alike. A wired digital controller adjusts output from 0% to 100% in 1% increments and displays live wattage so you know exactly how much power you're using at any given moment.
The VP20 is uniquely versatile: it can be installed fully submerged in the pond or set up as an external dry-mount pump — making it the standard pump recommendation for the Evolution Aqua Nexus 320 gravity-fed filter system and similar gravity-return filtration setups. At full power it draws 190 watts; throttle it back for winter low-flow maintenance or to reduce waterfall noise, and energy use drops proportionally.
Key Features & Benefits
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | VP20 |
| Maximum Flow Rate | 5,280 US GPH (20,000 lph) |
| Maximum Head Height | 18 ft (5.5 m) |
| Power Consumption | 190W maximum (variable — adjustable 0–100%) |
| Voltage | 115V, 60 Hz |
| Discharge Connection | 2" MPT (male threaded); step-down hosetails included |
| Hosetail Step-Down Sizes | Approx. 1", 1-1/4", 1-1/2" (25 / 32 / 38 mm metric) |
| Dimensions (L × W × H) | 12.6" × 5.6" × 7.3" (319 × 142 × 181 mm) |
| Cord: Plug to Control Box | 6 ft (2 m) |
| Cord: Control Box to Pump | 30 ft (10 m) |
| Motor Type | Six-pole, three-phase asynchronous |
| Controller Technology | Sinusoidal wave — near-silent operation |
| Flow Adjustment | 0–100% in 1% increments; live wattage displayed on controller |
| Installation Options | Submersible (submerged) OR external dry-mount (flooded-suction only) |
| Vertical Installation | Yes — horizontal or vertical orientation supported |
| Dry-Run Protection | Thermal protector — auto-shuts on blockage or water loss |
| Electrical Safety | GFCI-protected outlet required |
| Water Type | Freshwater only — NOT for pools or salt water |
| Manufacturer | Evolution Aqua, Lancashire, UK |
| Warranty | 2-Year Manufacturer's Limited Warranty |
Installation Overview
- Use the widest practical hose diameter for inlet plumbing to minimize friction loss
- Remove (saw off) extra step-down sections from hosetails — use only what you need
- Always use a hose clamp to secure hose to hosetail
- Do not submerse the controller — mount it in a dry location
- Plug into a GFCI-protected 120V grounded outlet
- Use the controller to set initial flow at 50% and increase gradually to desired output
- Seasonally reduce flow in winter by dialing down the controller — no separate bypass needed
Ideal Applications
- Evolution Aqua Nexus 320 filter systems — the VP20 is the standard recommended pump for this filter in gravity-fed configurations
- Large koi pond filtration returns (1,000–5,000+ gallon ponds)
- Gravity-fed drum filter and bead filter setups
- Medium to large waterfalls and streams where flow adjustment is desired
- Pond circulation upgrades where energy efficiency is a priority
- Systems where seasonal flow reduction is needed without secondary pump installation
Recommended Pairings
- Evolution Aqua Nexus 320 — gravity-fed biological filter; VP20 is the primary pump recommendation
- Evolution Aqua EazyPod — combined mechanical/biological filter, pump-fed or gravity-fed
- Evolution Aqua Surge Filter with UV — pump-fed pressurized filter (use at VP20's optimum flow range)
- UV clarifiers for green water control on large koi ponds
- Ball valves and unions on outlet plumbing for easy seasonal maintenance access
Varipump Family Comparison
| Model | Max Flow | Max Head | Max Watts | Outlet |
|---|---|---|---|---|
| Varipump 10000 (VP10) | 2,640 GPH | 10 ft | 75W | 1.5" |
| Varipump 20000 (VP20) ← This Model | 5,280 GPH | 18 ft | 190W | 2" |
Frequently Asked Questions
What is the performance range of the Varipump 20000?
The VP20 delivers a maximum flow of 5,280 GPH with a maximum head height of 18 feet. The digital controller adjusts power from 0% to 100% in 1% increments — at full power the pump draws 190 watts. Dial it back and wattage (and flow) reduce proportionally. The controller’s live wattage display lets you see exactly how much energy you’re using at any setting.
Can this pump be installed externally (out of the pond)?
Yes. The VP20 supports both submersible and external flooded-suction installation. For external use, the pump body must be positioned below the pond’s water level at all times — this allows the pond to gravity-feed water to the pump inlet. The pump is not self-priming. This makes the VP20 an ideal pairing for the Evolution Aqua Nexus 320 gravity-fed filter and similar gravity-return systems where the pump sits in a dry external chamber below the pond water line.
How does the digital controller work?
The included wired digital controller adjusts pump output in 1% increments from 0% to 100%. At each setting, the controller displays the live wattage draw — so you’re never guessing about energy consumption. This makes it easy to fine-tune your waterfall display, reduce flow during winter months to maintain biological filter activity without full turnover, or match pump output precisely to your filter’s rated flow requirements.
What safety protections are built in?
The VP20 includes an integrated thermal protector that automatically shuts down the motor if it detects a blockage or loss of water — preventing damage from accidental dry running. However, the pump should never be intentionally run without water; the thermal protector is a failsafe, not a primary operating mode. The pump must be connected to a GFCI-protected 120V grounded outlet. Do not submerse the controller — mount it in a dry, protected location.
What are the plumbing connection sizes?
The VP20 features a 2” MPT (male threaded) discharge connection. Included step-down hosetails allow connection to flexible pond hose in approximately 1”, 1-1/4”, and 1-1/2” sizes (25/32/38mm). For maximum flow and minimum friction loss, use the largest practical hose diameter and saw off only the step-down sections you don’t need. A hose clamp should always be used to secure hose to hosetail.
What warranty does the Varipump 20000 carry?
The Evolution Aqua Varipump 20000 is backed by a 2-Year Manufacturer’s Limited Warranty from Evolution Aqua. As an authorized Evolution Aqua dealer, Pond Pro Direct supports this warranty. Contact us at support@pondprodirect.com or (765) 508-4352 with any warranty questions.
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
Orders are processed within 1–5 business days, depending on product type, brand, and fulfillment method. Products sold on Pond Pro Direct ship directly from manufacturers or authorized distribution partners and do not ship from a single centralized warehouse.
Processing times may vary by brand, item type, fulfillment method, and whether an item is made to order or ships via freight.
Order Confirmation
After placing your order, you will receive an order confirmation email confirming that we have received your order and pre-authorized your payment method.
Once your order is received, we contact the manufacturer or distribution partner to confirm availability and fulfillment timelines.
- If an item is unavailable or on backorder, we will notify you by email and void the pre-authorization.
- If the item is available, the payment will be processed and the order submitted for shipment.
Order Shipment
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.
If you do not receive shipping confirmation within 6 business days, please contact us at support@pondprodirect.com.
Shipping Destinations
At this time, we primarily ship within the United States. Some products may be available for shipment to Canada. If the website allows checkout and accepts your shipping address, the product is eligible for delivery to that location.
Changing Your Shipping Address
Address changes after an order has been processed or shipped may result in delays or additional carrier fees. Any carrier charges associated with address changes are the responsibility of the customer.
Shipping Times
All shipping times are estimates only and not guarantees.
- 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.
If an order is cancelled after it has been processed or shipped, the customer may be responsible for applicable shipping charges, freight fees, carrier return fees, and warehouse handling costs, where applicable.
Shipping Options
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).
If you have questions about your order, please contact us at support@pondprodirect.com or call (765) 508-4352 during business hours.
Cancellations (Before Order Ships)
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
