Modular Gravity Tool Holder: A 3D Printed Wall System for Brooms, Mops, and Long-Handle Tools

For a reusable 3D-printed cleaning-tool hook, PETG is the best default for an ordinary indoor broom, mop, squeegee, or brush holder. It is the easiest of these three materials to turn into a stiff wall-mounted body, and it tolerates incidental moisture better than a PLA-only approach. Use exact-grade polypropylene only when repeated wet cleaning or a named cleaner makes chemical resistance the deciding requirement and you can control PP warping, layer bonding, and creep. Use TPU as a separate removable grip, roller, pad, or bumper—not as the main load-bearing hook. If the holder belongs to a healthcare, food-production, laboratory, infection-control, or audited sanitation process, use facility-approved hardware or a documented application-specific material and process instead of treating a hobby FDM print as certified equipment.

There is no universal “longest-lasting” filament here. Service life depends on the real handle diameter, sustained bending load, wall fasteners, room temperature, cleaner chemistry, soil retention, cleaning frequency, and whether the holder can drain and dry. GoodPrints has not run a first-hand service-life or disinfection study on this file. The useful answer is a bounded material choice plus a finished-part test.

PETG, polypropylene, or TPU for cleaning-tool hooks?

Prusa's current PETG guidance, polypropylene guidance, and flexible-material guidance describe different printing and mechanical behaviors. Those pages help choose a starting material, but they do not certify this holder for a particular cleaner, disinfectant, skin-contact duration, or contamination-control program.

Start with the cleaning workflow, not the filament name

Ordinary household or workshop storage

For a dry wall that holds a broom, push broom, dust mop, squeegee, or scrub brush after routine use, print the structural body in PETG. Keep the wet working end below the holder, give the handle air space, and avoid a shelf or socket that collects drips. A captured TPU contact piece can improve grip on smooth handles, but make it removable so it can be washed, dried, inspected, and replaced separately.

Repeated wet cleaning or named chemicals

When the holder is wiped or soaked on a schedule, write down the exact detergent, disinfectant, degreaser, concentration, contact time, rinse step, and temperature. The EPA says disinfectants work according to their label directions; the label's use sites, surface types, precautions, and contact time matter. Do not infer compatibility from the word “chemical-resistant.” Test the actual printed grade and color, because pigments, fillers, layer lines, residual stress, and print defects all belong to the finished part.

Healthcare and controlled sanitation

The CDC's current environmental-cleaning guidance calls for facility-approved products, manufacturer instructions, material compatibility, and procedures for preparation, use, storage, and disposal. A home-printed hook may be reasonable only if the facility's responsible owner accepts it within that system. It must not silently bridge dirty and clean zones, substitute for approved storage, or create a surface the documented process cannot clean and dry. For a narrow camera-cleaning workstation, use the separate camera sensor-cleaning tool-stand guide. For respiratory protective equipment, use the dedicated respirator drying-stand boundaries.

Design the holder so it can actually be cleaned

• Expose the contact surfaces. Use open channels, generous radii, and visible edges instead of blind pockets around rollers, screws, or handle stops.
• Drain downward. Do not put a cup directly under a wet mop or brush handle. Add a clear drip route and keep the wall, anchors, and floor condition in view.
• Separate grip from structure. A rigid PETG or PP body plus replaceable TPU contact pieces is easier to inspect than one soft monolithic assembly.
• Avoid texture where soil collects. Decorative ribs, rough support scars, exposed infill, and inaccessible fastener recesses work against cleanability.
• Keep handles apart. Space tools so a used brush or mop does not touch a clean handle or prevent the neighboring item from drying.
• Make removal obvious. The holder should come off the wall or release its inserts without contaminating the clean side or requiring destructive disassembly.
• Plan retirement. Replace the part after cracking, whitening, permanent opening, tackiness, swelling, trapped soil, odor, surface damage, loose fasteners, or loss of grip.

A finished-part test that answers “which lasts longest?”

1. Measure every handle. Record minimum and maximum diameter, taper, surface texture, stored mass, center of gravity, and the direction a user pulls the tool out.
2. Verify the wall system. Choose screws, anchors, rail spacing, and substrate capacity for the full loaded assembly. The print cannot rescue weak drywall anchors or a damaged wall.
3. Run a static dwell test. Load the heaviest tool in the warmest expected room for at least 72 hours. Mark the opening width and roller position before and after; reject permanent opening or slip.
4. Cycle the complete holder. Insert and remove the real wet and dry tools at least 100 times, including off-axis pulls. Inspect the pivot, grip insert, screw seats, layer lines, and handle finish.
5. Test the exact cleaner. Print coupons with the same material, color, layer height, and orientation. Apply the actual cleaning cycle repeatedly, including dwell, rinse, and drying. Compare mass, dimensions, surface, stiffness, tack, color transfer, and cracking against an unexposed control.
6. Clean the assembled geometry. Confirm that soil can be removed from the deepest groove and behind every roller without taking unsafe shortcuts. Let it dry in its installed position and check for trapped liquid.
7. Set an inspection interval. Start short, then extend only after repeated clean, load, and removal cycles show stable fit. A part that merely looks intact is not proof of indefinite life.

Use the wall-thickness and perimeter guide to tune a load-bearing PETG body, and the broader functional-filament guide for a first material screen. If a documented cleaner, unusual load, controlled workflow, or exact fit makes this a production part, prepare the requirements with the custom material-selection checklist before requesting a quote or asking JC Print Farm to review the job.

Final recommendation

Choose PETG for the main reusable cleaning-tool holder in ordinary indoor use, exact-grade PP only after the real cleaner and printed geometry pass qualification, and TPU only as a removable grip component. Keep wet tool heads below the mount, design for drainage and inspection, test the complete loaded assembly, and move to facility-approved hardware or a documented application-specific process wherever contamination control is consequential or audited.