Atlantic SP1600 FastFalls 16" Waterfall Spillway – Pondless Waterfall Weir for DIY Backyard & Landscape Features
✓ 30-Day Return Period
✓ Price Match - We will Beat Lower Prices!
✓ Secure Encrypted Checkout
✓ Questions? - Call (765) 508-4352
Description
The Atlantic SP1600 FastFalls is a professional-grade 16” waterfall spillway built for pondless waterfalls, decorative streams, and landscape water features. Constructed from HMWPE (High Molecular Weight Polyethylene) — Atlantic’s premium impact-resistant polymer — with an internal baffle system stabilized by support cones, it handles up to 3,000 GPH and carries the weight of large decorative boulders without deforming. The innovative rear liner attachment and one-piece liner flange simplify installation and eliminate the leakage risk that comes with traditional liner-to-spillway connections.
Every SP1600 includes a complete installation kit with liner flange, splash reduction foam, top grate, stainless screws, silicone, and a 1.5” MIPT fitting. Backed by Atlantic’s Lifetime Warranty.
Key Features & Benefits
What’s Included
- Atlantic SP1600 16” FastFalls spillway body
- 1.5” FIPT spinweld bulkhead fitting (pre-installed)
- One-piece liner attachment flange
- Splash reduction foam
- Removable top grate
- Stainless screws (for liner flange attachment)
- Silicone sealant
- 1.5” slip × 1.5” MIPT fitting (accepts 1.5” flex PVC hose)
Technical Specifications
| Specification | Value |
|---|---|
| SKU | SP1600 |
| Waterfall Width | 16” |
| Dimensions (W × D × H) | 16½” × 9½” × 7¼” |
| Max Pump Flow | 3,000 GPH |
| Bulkhead | 1.5” FIPT — pre-installed spinweld fitting |
| Hose Connection | Accepts 1.5” flex PVC (via included 1.5” MIPT fitting) |
| Material | HMWPE (High Molecular Weight Polyethylene) |
| Construction | One-piece; internal baffles + support cones; crush-proof |
| Liner Compatibility | 45-mil EPDM and PVC pond liner |
| Spillway Lip | Reinforced raised lip — retains rock, gravel, mulch, soil; plantable |
| Brand | Atlantic Water Gardens (Atlantic-OASE) |
| Warranty | Lifetime |
Atlantic FastFalls Family
| Model | SKU | Width | Max GPH | Bulkhead | Dimensions (W×D×H) |
|---|---|---|---|---|---|
| FastFalls 16” ← This | SP1600 | 16” | 3,000 | 1.5” FIPT | 16½”×9½”×7¼” |
| FastFalls 19” | SP1900 | 19” | 4,000 | 2” FIPT | 20½”×17”×10¼” |
| FastFalls 26” | SP2600 | 26” | ~6,000 | 2” FIPT | Confirm |
| FastFalls 32” | SP3200 | 32” | ~8,000 | 2” FIPT | Confirm |
All FastFalls models are constructed from HMWPE with the same baffle/support cone system, rear liner attachment, and Lifetime Warranty. Select size based on your desired waterfall width and pump GPH at your required head height. ~ = approximate; confirm larger models before ordering.
Frequently Asked Questions
How does the Atlantic SP1600 FastFalls simplify pondless waterfall installation?
The SP1600 is designed as a one-piece, ready-to-plumb waterfall starting point. Three design features make installation fast:
- Pre-installed 1.5” FIPT spinweld bulkhead — no fitting to source; connect 1.5” flex PVC directly
- Rear liner attachment with one-piece liner flange — secure the liner to the included flange using the included stainless screws and silicone; eliminates liner-to-spillway leakage from settling or shifting
- Removable top grate — place rock and gravel on top for complete natural camouflage while maintaining easy access for cleaning
Set on a firm, level foundation, connect your pump hose to the bulkhead, attach the liner, and cover with rock. The entire installation typically takes less than an hour for an experienced builder.
What is the recommended GPH flow rate for the 16-inch FastFalls?
The SP1600 is rated for pumps up to 3,000 GPH. Atlantic’s internal baffles and splash reduction foam are optimized to produce a smooth, even sheet of water within this flow range. For a thinner, more delicate water sheet, use a lower-output pump within your head height rating. For a fuller, bolder curtain, size toward the 3,000 GPH maximum. Exceeding 3,000 GPH risks turbulent overflow over the sides of the enclosure.
For flows above 3,000 GPH or wider waterfall features, see the SP1900 (19”, 4,000 GPH max).
Can the SP1600 FastFalls be used with both EPDM and PVC liners?
Yes. The SP1600’s one-piece liner flange and rear liner attachment system are compatible with both 45-mil EPDM and PVC pond liners. To seal:
- Trim the liner to fit the rear liner attachment area
- Apply the included silicone sealant at the interface
- Secure the liner with the included stainless screws through the one-piece liner flange
The rear attachment design keeps the liner-to-spillway seal on the back of the unit (inside the landscape), away from the visible waterfall face, so rock placement is unaffected by the liner hardware.
How do the internal baffles improve waterfall aesthetics?
Incoming pump water enters the SP1600 through the 1.5” rear bulkhead under pressure, which naturally creates turbulence. Without baffling, this would produce an irregular, bubbling waterfall with “dead spots” where water doesn’t reach the spillway edges.
Atlantic’s internal baffles — stabilized by support cones — break up the incoming flow and diffuse it evenly across the full 16” width before it reaches the spillway lip. The included splash reduction foam further calms the water surface. The result is a smooth, even sheet of water across the entire weir width, with no dead spots or turbulent patches. This is the visual quality difference between a professional-grade spillway and budget alternatives.
Is the Atlantic SP1600 durable enough for heavy rock camouflage?
Yes — and this is one of the FastFalls’ primary design advantages. The SP1600 is constructed from HMWPE (High Molecular Weight Polyethylene), a premium polymer with significantly higher impact resistance and structural rigidity than standard HDPE. Internal support cones reinforce the baffle structure from below, distributing point loads across the full shell.
Place large decorative boulders directly on top of the unit for complete camouflage. Atlantic is so confident in the structural integrity that they back every FastFalls with a Lifetime Warranty — covering the spillway body for the life of your water feature.
Why Buy from Pond Pro Direct?
- Authentic Atlantic Water Gardens products with full Lifetime Warranty coverage
- Expert pump and basin sizing guidance — call or text (765) 508-4352, Mon–Fri 9am–5pm EST
- Free shipping on all orders
- Price match guarantee on identical products
- 30-day return period on eligible items
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
