Quick verdict
A 3D printed replacement sliding door for the FCMP IM4000 style dual-chamber compost tumbler, made by a third party, that fits the chamber opening and is marked so the active chamber is told from the curing one at a glance. The original doors crack in sun after a few seasons and the tumbler is useless without one; this is a cheap way to keep it running and the marking solves the small daily question of which side takes the scraps. Expect a 3D printed finish and check the tumbler model before ordering.
Strengths
- Replaces a cracked or lost FCMP tumbler door
- Marked so the active chamber is obvious
- Keeps a working tumbler out of the landfill
- Cheap against a new tumbler
- Slides in the original track
Weaknesses
- Third-party 3D printed part with a layered finish
- Fits the FCMP dual-chamber pattern only
- Printed plastic may need a sand to slide freely
The overall YardToolLab Score is out of 100. Section scores are out of 10.
The Door Always Goes First
A dual-chamber tumbler lasts a decade and its sliding doors last three summers before the sun makes them brittle and the slide cracks. Without a door the chamber spills and the tumbler is done. This is a third-party 3D printed replacement for the FCMP pattern door, with a marking that tells the active chamber from the curing one.
This review is based on the listing specifications and on how replacement tumbler doors fit and wear generally. We have not used this part ourselves. It is made by a generic seller and is not an FCMP product.
Fitting
Pull the remains of the old door out of the track, brush the track clean of compost and slide the new door in. If the print is tight, a few strokes of sandpaper along the edges frees it. That is the whole job.
The Marking
A two-chamber tumbler works by filling one side while the other cures, and every few weeks they swap. The question of which side is active is asked every time the kitchen bucket comes out. A marked door answers it at a glance, which is a small thing that makes the tumbler easier to run properly.
What to Expect
A 3D printed part has a layered surface and is not as smooth as the moulded original. It is not load bearing and does not need to be. It is plastic in the sun, as the original was, so expect to replace it again in a few years; the price makes that reasonable.
Fit
The FCMP dual-chamber tumblers and the many lookalikes sold under other names with the same door. Measure the old door and the track and compare with the listing. A door a few millimetres out does not slide.
Why Bother
A tumbler with a cracked door is often thrown away. A replacement door for a few dollars keeps a working composter working, which is the point of composting.
Who Should Buy It
- FCMP tumbler owners with a cracked or missing door.
- Anyone who keeps mixing up the chambers.
- People who would rather repair than replace.
Common Owner Complaints
Rough finish and a tight fit. Sand the edges; it is a printed part.
Care
Wipe the track clean each time the chamber is emptied so grit does not wear the door, and store the tumbler in part shade where the sun on the doors is weaker.
Alternatives to Consider
An original FCMP replacement door if the maker stocks it. A sheet of UV-stable plastic cut to size. A new tumbler if the body is cracked too.
Verdict
For a tumbler with a broken door, a printed replacement keeps it composting for the price of a bag of soil. Measure first, sand if tight and enjoy knowing which side is which.
Full specifications
Replacement Lid Compatible with FCMP Compost Tumblers, Easy Side Identification, 3D Printed FAQs
The original doors are thin plastic that goes brittle in sun and cracks at the slide, and a door that falls out lets the compost out with it.
The FCMP dual-chamber tumbler and its lookalikes with the same sliding door. Measure the old door and compare with the listing before ordering.
A two-chamber tumbler has one side filling and one side curing, and they swap every few weeks. A marked door says which is which without opening it.
For a sliding door that is not load-bearing, yes. A light sand on the edges helps it slide if the print is tight.
