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Dandy Sack - Round - 24" Diameter - Storm Grate Sediment Filter

Dandy Sack - Round - 24" Diameter - Storm Grate Sediment Filter

SKU DS-RD-24
$122.60 - $122.60
$122.60
$122.60 - $122.60
$122.60
Free Shipping

Dandy · Beneath The Grate · 24″ Round

Dandy Sack storm grate sediment filter for a 24″ diameter round grate. Cut to match round inlets rather than forcing a rectangular sack onto a circular frame. The open-top sack hangs beneath the grate on internal cradle straps, with a two-foot containment area that captures suspended solids before they reach the inlet. No rebar required.

Grate Size
24″ RoundFits the grate it hangs from
Shape
RoundBrand: Dandy
Containment
2 ftEmpty at one third full
  • Hangs beneath the grate
  • No rebar required
  • Internal straps cradle the grate
  • Two-foot containment area
  • Free shipping on all orders

Free Shipping - Please submit a Quote Request for quantities larger than listed below.

Quantity Price Per Unit

(Free Shipping)
1 $122.60
2+ $116.47
5+ $110.34
10+ $104.21

01 Hangs beneath the storm grate

The Dandy Sack Storm Grate Sediment Filter

Storm grate filtration quality is what the Dandy Sack is all about. This incredibly strong open-top bag is specially designed to hang underneath a storm grate, where it expertly filters the thickest sediment-laden storm water.

Suspended solids are allowed to settle out of the slowed flow and are captured by the Dandy Sack storm grate sediment filter before they reach the inlet. Internal straps cradle the grate, so there is no rebar to set and nothing to fabricate on site.

Dandy Sack storm grate sediment filter hanging beneath a storm grate
The open-top sack hangs below the grate, which rests in its internal straps.

2foot containment area

Deep enough to hold a useful volume of sediment, shallow enough that one person can empty it.

02 Why it gets specified

No Rebar Required

Installation is genuinely simple. Internal straps cradle the grate for added support and security when installing and removing, so the grate goes into the sack and the whole assembly drops back into the inlet. Nothing is drilled, set or fabricated.

Download Specification Sheet

03 What you get

Get Maximum Benefits With Dandy

  • Affordable price
  • Super easy installation — no rebar required
  • Internal straps cradle the grate for added support and security when installing and removing
  • Two-foot containment area is manageable
  • Easily seen because it is fabricated from a bright orange monofilament geotextile
  • Five standard sizes, rectangular and round, to fit a wide variety of inlets
  • Available with optional oil absorbents
  • Also available with patented curb-filtering technology as the Dandy Curb Sack
Why the containment depth matters. A deeper sack holds more sediment but becomes awkward and heavy to lift out. Two feet is the point where the unit still holds a worthwhile volume between services while remaining manageable for one person on the lifting straps.

04 Sizing

Available Sizes

Measure the grate the sack will hang from, then choose the matching size. Five sizes are stocked — four rectangular and one round.

24″ × 24″DS-24-24 36″ × 24″DS-36-24 48″ × 24″DS-48-24 48″ × 36″DS-48-36 24″ RoundRound grates
Measure the grate, not the opening. The size given is the grate the sack is fitted around — length and width on a rectangular grate, diameter on a round one. If you are working from a drawing rather than the grate itself, check the figure against the frame before ordering.

05 Installation

Installation Guidelines

Four steps. The one to get right is the strap position: the grate must sit between the upper and lower straps.

  1. Remove the grate. Lift the grate out of the catch basin.
  2. Fit oil absorbents if using them. Place the absorbent pillow in the pouch on the bottom of the unit.
  3. Seat the grate in the straps. Stand the grate on end, move the top lifting straps out of the way, and place the grate into the Dandy Sack so it sits below the top straps and above the lower straps.
  4. Lower the assembly in. Holding the lifting straps, insert the grate into the inlet.
Strap position is the whole install

The grate has to end up below the top straps and above the lower ones. That is what lets the internal straps cradle its weight and keeps the sack hanging square beneath the grate. Seat it wrong and the sack will not hang properly, and lifting it out later becomes a problem.

06 Fabric performance

Geotextile Properties

The sack is fabricated from a highly visible orange monofilament geotextile. Tested values below.

PropertyTest MethodUnitResults
Tensile StrengthASTM D4632lbs450 x 300 lbs
ElongationASTM D4632%38% × 21%
Trapezoidal TearASTM D4533lbs165 x 150 lbs
CBR PunctureASTM D6241lbs1,000 lbs
Weight (mass per unit area)ASTM D5261oz/yd²6.5 oz/yd²
ThicknessASTM D5199mils30 mils
Apparent Opening Size (AOS)ASTM D4751US Std Sieve30 US Std Sieve
PermittivityASTM D4491sec-14.9 sec-1
Water Flow RateASTM D4491gal/min/ft²365 gal/min/ft²
% Open Area (POA)COE-22125-86%29%
UV Resistance (% retained @ 2,500 hrs)ASTM D4355%70%
Color——Orange
Property values are subject to change without notice. Check the current specification sheet if the figures are going into a submittal.

07 Maintenance

The One-Third Rule

Because the sack hangs out of sight beneath the grate, servicing it depends on actually looking inside — and there is a specific threshold to look for.

  • After each storm event, remove all accumulated sediment and debris from the vicinity of the unit.
  • After storms and at regular intervals, look into the sack. If the containment area is more than one third full of sediment, the unit must be emptied.
  • To empty it, lift the unit using the lifting straps and remove the grate. If using oil absorbents, replace the pillow when it is near saturation.

One third is not an arbitrary figure. Past that point the remaining containment volume is too small to handle the next event, and the unit starts passing sediment straight through.

Storm grate filtration with the Dandy Sack.

08 Ordering

No Minimum Order

The Dandy Sack has no minimum order quantity. Order any quantity, in any combination of the five sizes.

Shipping is free, at every quantity.

Request A Written Quote

09 Which Dandy do I need?

Beneath, Around Or Against

The Dandy Sack hangs beneath a storm grate with an open top. A Dandy Bag or Curb Bag encloses the grate instead, and the Dandy Curb sits against a grateless opening.

Dandy Bags Curb Bags Dandy Curb

10 Documentation

Specifications And Brochure

Dandy Sack specification sheetPDF Dandy product brochurePDF

11 Buying from us

Why Buy Inlet Protection From Landscape Discount

Genuine Dandy product

The real article, not a look-alike. We never substitute another brand or product type without the explicit consent of the customer.

Five standard sizes

Rectangular grates from 24″ through 48″, plus a 24″ round, so the sack suits the grate rather than being forced to fit.

The full inlet protection range

Sacks, bags, curb filters and dewatering products, so the recommendation fits the inlet you actually have.

We answer the phone

When you call you quickly reach a helpful, live person happy to answer your product and order questions. (M-F 5:00 am - 3:00 pm Pacific Time)

12 Common questions

Dandy Sack FAQs

How is the Dandy Sack different from a Dandy Bag?
The Dandy Sack is an open-top bag that hangs beneath the grate with a two-foot containment area. A Dandy Bag encloses the grate itself. If your inlet has no grate at all, the Dandy Curb sits against the opening instead.
How do I work out which size I need?
Measure the grate the sack will be fitted around — length and width on a rectangular grate, diameter on a round one. Five sizes are stocked: 24″ x 24″, 36″ x 24″, 48″ x 24″, 48″ x 36″ and 24″ round.
Is there a round option for round grates?
Yes. The 24″ round sack is cut to match round inlets, rather than forcing a rectangular sack onto a circular frame. It installs and services exactly like the rectangular sizes.
Do I need rebar or any fixings?
No. Internal straps cradle the grate and carry the unit, so nothing is drilled, set or fabricated on site. That is the main reason it installs as fast as it does.
Where exactly does the grate sit in the sack?
Below the top straps and above the lower straps. Stand the grate on end, move the top lifting straps aside, and seat the grate between the two sets of straps before lowering the assembly into the inlet.
What is the fabric made of?
A high-strength orange monofilament geotextile weighing 6.5 oz/yd² at 30 mils thick, with 450 x 300 lb tensile strength and 1,000 lb CBR puncture resistance. Water flow rate is 365 gal/min/ft². Full properties are in the specification sheet above.
When does it need emptying?
Look into the sack after storm events and at regular intervals. If the containment area is more than one third full of sediment, the unit must be emptied. Past that point there is not enough capacity left for the next event.
How do I empty it?
Lift the unit using the lifting straps and remove the grate. Clear the accumulated sediment, then reseat the grate between the straps and lower it back in.
How deep is the containment area?
Two feet. That holds a worthwhile volume of sediment between services while staying manageable to lift out, which is the trade-off a deeper sack loses.
Is there a minimum order?
No, there is no minimum order. Order any quantity, in any mix of the five sizes.
Can it capture oil as well as sediment?
With the optional oil absorbent pillow fitted in the pouch on the bottom of the unit, yes. Replace the pillow when it approaches saturation.
Why is it orange?
Visibility. The bright orange monofilament geotextile makes the unit easy to spot on site, which matters more than usual here because the sack itself hangs out of sight below the grate.
What does shipping cost?
Nothing. Shipping is free on every order, at any quantity.