RAIN 21 Pot 3 Row 15L Compact Header Kit. Overhead view of 21 grey pots in 3 rows, blue pipe connections, reservoir.

RAIN 21 Pot 3 Row 15L Remote Header Kit: 21 gray square pots in 3 rows, connected by tubes to a central header tank.

RAIN 21 Pot 3 Row Compact Header Kit: 21 gray pots in 3 rows, connected as a drip irrigation system.

RAIN 21 Pot 3 Row 30L Remote Header Kit system diagram: 21 square pots in 3 rows, connected by pipes.

Alien Hydroponics RAIN System - 21 Pot 3 Row Kit

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Alien Hydroponics RAIN System - 21 Pot 3 Row Kit

Achieving uniform nutrient distribution in a high-capacity grow is no easy feat. The Alien Hydroponics RAIN System - 21 Pot 3 Row Kit solves this by mimicking natural rainfall, delivering oxygen-rich nutrients directly to each plant's root zone. This unique top-feed approach ensures that every plant in your setup receives a consistent, oxygenated feed, effectively eliminating stagnant water and nutrient imbalances.

Whether you are managing a large-scale facility or a professional private grow, this system is built for performance and scalability. For those requiring even more coverage, the RAIN system can be expanded to a 36 Pot 4 Row Kit. If you prefer a deep water culture approach instead of top-feeding, consider the Alien Hydroponics RDWC 28 Pot 4 Row system. Designed for versatility, the RAIN kit works with various growing mediums while preventing root rot and salt buildup. Its glue-free, snap-on design means you can spend less time on assembly and more time on your harvest. For slightly larger setups within the same footprint, explore the 24 Pot 3 Row Kit.

Please note: The RAIN system requires a nutrient reservoir to function. While not included, we recommend a high-quality reservoir with at least 145 gallons of capacity for optimal performance.

What's Included

1x DRAIN Pump Pipe Adapter
1x Pressure Water Pump 30
1x Cycle Timer
1x AERO/RAIN Header Pot Complete 36L
21x AERO/RAIN Pot 15L
1x Silver Lid
21x RAIN Lid Cover
21x RAIN Lid
42x RAIN Lid Clip
1x Header Pot Blank
42x Pot Stand for 15L Pot
21x RAIN Fabric Pot 15L
21x Drain Cover - Copper
2x Elbow 50mm Barbed
1x Tee 50mm Barbed
3x Elbow 50mm Dual Flow
19x Tee 50mm Dual Flow
22x Washer 50 X 64mm
22x Nut 50mm Dual Flow
12x Clamp Size 2
8x Clamp Size 3
3x Valve 16mm Green
3x Plug - 16mm
42x Tee 16mm - 4mm
21x Pot Clip 16mm
1x Tee 25mm Barbed - 3/4" Male
2x Tee 25mm Barbed
2x Elbow 25mm Barbed - 3/4" Male
2x Elbow 19mm Barbed
2x Elbow 40mm Barbed
1x Siphon Tee 19mm Fitting
1x Siphon Tee 40mm Complete
14x Pipe 16mm Silver Bulk by Meter
4x Pipe 19mm Black Bulk by Meter
3x Pipe 25mm Blue Bulk by Meter
4x Pipe 40mm Silver Spiral Bulk by Meter
9x Pipe 4mm Green Bulk by Meter
12x Pipe 50mm Silver 100cm Piece
1x Wrench 50mm
1x Pipe Cutter 50mm
1x RAIN Instructions
1x JET-STREAM DRAIN Water Pump 1100GPH
1x JET-STREAM DRAIN Water Pump Power Adapter

Features

🔄

Dual-Flow™ Fittings

Patent-pending side slots prevent root clogging while maintaining high flow rates.

🛡️

Copper Protection

Copper-plated drain covers naturally deter roots from entering the drainage network.

❄️

Heat Resistance

Silver polymer pipes reflect heat to keep nutrient solution temperatures stable.

⬆️

Raised Drainage

Sloped bases and raised grids ensure rapid water clearance and prevent waterlogging.

🧠

Rain Brain

Automated controller ensures consistent nutrient delivery on a precise schedule.

🛠️

Easy Setup

Threaded fittings and snap-on pipes allow for a tool-free, glue-free assembly.

💪

Durable Build

Non-reactive, high-quality materials designed for longevity in professional environments.

📐

Customizable

Adjustable pot spacing and remote header options to maximize your growing space.

Specifications

Specification	Value
Number of Pots / Rows	21 Pots / 3 Rows
Min Size (Compact Header)	111 3/8" x 43 1/4" (15L) / 132 1/2" x 52 3/4" (30L)
Max Size (Compact Header)	178 3/4" x 100" (15L) / 218 7/8" x 115" (30L)
Min Size (Remote Header)	115 3/8" x 43 1/4" (15L) / 136 3/8" x 52 3/4" (30L)
Max Size (Remote Header)	218 1/8" x 100" (15L) / 258 1/4" x 115" (30L)
Water Pumps Included	Pressure Pump 30 & JET-STREAM DRAIN (1100 GPH)
Recommended Reservoir	Minimum 145 Gallons / 550 Liters

Support & Manuals

📄Alien RAIN User Manual

Warranty

The ALIEN RAIN Top-Feed System is covered with a one-year manufacturer warranty for your peace of mind.

FAQs

Does this kit include a nutrient reservoir?+

No, the reservoir is sold separately. For this 21-pot system, we recommend a minimum capacity of 145 gallons (550 liters) to ensure adequate nutrient supply.

What growing mediums are compatible with the RAIN system?+

The RAIN system is highly versatile and works exceptionally well with soil, coco coir, or clay pebbles. Its design ensures uniform saturation and prevents nutrient lockout across all media types.

What is the recommended watering frequency?+

Alien Hydroponics suggests a watering frequency of approximately one minute every hour. This mimics natural rainfall patterns and maintains high oxygen levels in the root zone.

Is the system difficult to assemble?+

No. The system features a glue-free, snap-on design with threaded fittings and easy-to-use pipe cutters, making assembly straightforward for both beginners and professionals.

Can I expand this system later?+

Yes, the modular design of Alien Hydroponics systems allow you to scale up to 36 pots or reconfigure your layout as your grow space needs evolve.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

Most orders are processed within 24-48 hours after being placed.

Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

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Alien Hydroponics RAIN System - 21 Pot 3 Row Kit

Alien Hydroponics RAIN System - 21 Pot 3 Row Kit

What's Included

Features

Dual-Flow™ Fittings

Copper Protection

Heat Resistance

Raised Drainage

Rain Brain

Easy Setup

Durable Build

Customizable

Specifications

Support & Manuals

Warranty

FAQs

Shipping & Returns

Customer Reviews

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