FCMP Outdoor Heavy Duty 37 Gallon 8 Sided Steel Composter
- 37 gallons, dual chamber
- 5 to 6 turns every 2 to 3 days advised
- Powder-painted steel frame
- Recycled, UV-inhibited, BPA-free plastic bins
- Aeration holes and deep fins
- 1 year limited replacement warranty
Last refreshed Oct 2, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A dual-chamber tumbling composter that lets one side fill while the other cures. Material descriptions vary across the listing, so check the frame and bin materials before buying.
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ASIN: B009378AG2Model: IM4000Category: Composting Tumblers
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Overview
Deep fins and aeration holes inside a rotating dual-body drum loosen lumps and add air to the contents as it turns. Either side can be loaded on its own, and ergonomic fin handholds make the drum easy to rotate.
Two chambers allow continuous composting, and the handholds spare you from mixing by hand. The listing mixes steel, polypropylene and polyethylene across its text, and it gives only a rough timeline of a few weeks.
Who it's for
Gardeners who want continuous composting without hand mixing. Households with a small amount of scraps may prefer a smaller single unit.
Pros and cons
- Dual chambers for continuous composting
- Fin handholds make turning easier
- Aeration holes break up clumps
- Powder-painted steel frame resists rust
- Material descriptions conflict in the listing
- Frequent turning routine advised
- Composting timeline only roughly stated
Performance notes
Turning the drum mixes the contents while aeration holes and deep fins break up clumps and bring oxygen into the batch, which speeds breakdown. The listing advises a routine of several turns every few days. Using one chamber at a time while the second finishes means finished compost is always ready.
Specifications
| Brand | FCMP Outdoor |
|---|---|
| Model | IM4000 |
| Dimensions & fit | |
| Dimensions (L x W x H) | 30 x 28 x 36 inches |
| Item weight | 28 pounds |
| Capacity & performance | |
| Capacity | 37 gallons |
| Construction & materials | |
| Material Type | Polypropylene (PP), recycled UV-inhibited and BPA-free per description |
| Color | Black |
| Frame material | Powder-painted steel |
| Warranty & support | |
| Warranty | 1 year limited replacement |
| Other details | |
| Shape | Octagonal |
| Chamber design | Dual chamber |
| Turning routine | 5 to 6 turns every 2 to 3 days |
Closest rivals on specs
Good Ideas Plastic Outdoor 6.5 Cubic Foot Compost Wizard EnviroTumbler Composter Storage- Capacity 37 vs 49 gallons (-24%)
- Item Weight 28 vs 22 pounds (+27%)
Maygrove Outdoor Compost Bin 53 Gallon- Capacity 37 vs 53 gallons (-30%)
- Item Weight 28 vs 35.5 pounds (-21%)
East Oak Dual Chamber Outdoor Compost Tumbler- Capacity 37 vs 43 gallons (-14%)
- Item Weight 28 vs 12 pounds (+133%)
Frequently asked questions
How big is the FCMP Outdoor IM4000 and how much does it weigh?
The listed dimensions are 30 inches long, 28 inches wide and 36 inches high, and the weight is 28 pounds.
Is the FCMP Outdoor IM4000 made of steel or plastic?
Both. The frame is powder-painted steel and the chambers are plastic, although the title says steel and the material field says polypropylene.
How do I use both chambers of the FCMP IM4000?
Fill one side while the other cures, so there is always a supply of finished compost.