if I bury these under 4 ft of soil will they collapse or take the weight

They are reasonably sturdy but you may need to ensure they are protected with something else

Can this sustain weight from soil if buried in a dyke bottom?

I used for connecting linear drain to soakaway, buried 400mm down under Type 1 sub-base and Grano beneath Astra Turf

Will this connect to soakaway/attenuation crate 800 x 500 x 540 and if not can it be adapted to fit in any way?

Probably you will have to adapt it I think it’s pretty strong / flexible wider than normal house down pipe

How flexible is this? Could I join it one end to the other and form a circle?

We needed it for drainage around a bend in a ditch. If it was a big enough circle you could join the ends

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Flex-Drain 54021 Flexible/Expandable Landscaping Drain Pipe, Solid, 4-Inch by 8-Feet, Plastic, Black

Product ID: 85734909

Details

Brand
Flex-Drain
Colour
Black
Item length
243.84
Item weight
680 g
Material
Plastic
Maximum pressure
4 Bars

📏Expandable length up to 8 feet

🖤Durable solid black plastic construction

🛠️4-inch diameter for optimal water flow

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237 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Flex your landscape’s drainage game with Flex-Drain 54021!

BUILT TO LAST - Solid plastic pipe withstands up to 4 bars of pressure for reliable drainage
SEAMLESS INTEGRATION - Perfectly connects with downspouts, rain gutters, and diverters
TRUSTED BRAND QUALITY - Manufactured by Cleveland Tubing, Inc. with consistent performance
LIGHTWEIGHT YET STRONG - Only 680g for easy handling without compromising durability
EFFORTLESS WATER MANAGEMENT - Flexible and expandable design adapts to any landscape layout

The Flex-Drain 54021 is a 4-inch diameter, 8-foot long solid plastic landscaping drain pipe designed for flexible and expandable water drainage solutions. Engineered for durability with a 1.27 cm wall thickness and pressure resistance up to 4 bars, it ensures efficient water flow from gutters and downspouts. Lightweight at 680 grams and manufactured by Cleveland Tubing, Inc., this black pipe offers professional-grade performance for modern landscaping needs.

Specifications

ASIN	B004SHETCG
Best Sellers Rank	316,289 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,166 in Gutters & Accessories 1,564 in Decking & Fencing (DIY & Tools)
Brand	Flex-Drain
Colour	Black
Country of Origin	USA
Customer Reviews	3.9 3.9 out of 5 stars (52)
Global Trade Identification Number	00732736540016
Included Components	Amerimax - 54021
Item Dimensions L x W	2.44L x 0.1W metres
Item Length	243.84 Centimetres
Item Type Name	Amerimax - 54021
Item Weight	680 g
Manufacturer	Cleveland Tubing, Inc.
Material	Plastic
Maximum Pressure	4 Bars
Nominal Wall Thickness	1.27 centimeters
Outside Diameter	10.6 Centimetres
UPC	732736540016
Unit Count	1.0 count

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