AquaLoop - Endless Electric Water Blaster

What's in the loop

Zero screws. Zero glue. Really. As far as I could find, this is the only electric water blaster on MakerWorld with no assembly hardware at all (beyond the kit itself, of course). Every part slides onto a rail and locks the one before it; the last piece clicks everything shut. Even the switch and trigger are pinned with two offcuts of filament.

~410 g in your hand. Always. Here's the thing about tanks: the water rides in your kid's wrist. A tank blaster with 1 L on board is well over a kilo in hand. AquaLoop is ~230 g of prints + ~180 g of kit and battery: about 410 g ready to fire, whether your supply is a 250 ml bottle or the entire pool. The water stays on the ground, in your backpack, anywhere but your arm.

Full-size power inside. Built around the Kit 01, the big one: 7.4 V, up to 10 m of range, and the self-priming pump that makes the whole endless trick possible (specs are Bambu's, not mine). I put the larger kit in and still ended up lighter in hand than anything else I weighed.

The bottle cap turns any PET bottle into a mag. Screw the printed cap onto any standard soda bottle (PCO-1881 neck), feed the tube through, drop the bottle in a backpack. Congratulations, you're now a walking water fortress with 1.5 L on your back and 410 g in your hand.

Reload = dip, pull, count to five. The pump primes itself: tube in the water, hold the trigger, ~5 seconds, back in business. While everyone else is queuing at the tap, you're already firing again.

Swap tips with a quarter turn. Quarter-turn bayonet nozzles: tight jet for range, shower head for mercy on smaller siblings. Click on, click off. The mount is a simple open interface, so remix your own tips. I'd genuinely love to see them.

And the small stuff that isn't small:

It stands upright on its own foot between battles. No sand in the trigger, no blaster lying in the mud.

The trigger has that click . You'll see.

Field-tested on Ferragosto by my toughest QA team: my nephews. Getting it back was the hard part.

Fair warnings (the honest corner)

It's not silent. The pump means business, and sounds like it. Outdoors it's part of the fun; just don't expect stealth mode.

The jet is pulsed. That's how the piston pump works. It's normal, and it's oddly satisfying.

If it runs but stops drawing water, your battery is low. Not a clogged tube, not a bad build: the motor still spins happily long after it has lost the torque to prime. That is your low-battery warning light, and it means it's time for a fresh pack.

Never run the pump dry for more than a few seconds, and drain the blaster after playing (fire it empty for a moment, tube out of the water).

Electronics are not waterproof: don't dunk the blaster itself. It shoots the water, it doesn't swim in it.

Follow the safety notes that come with the kit and the battery: charge the battery outside the blaster, adult supervision for the wiring step.

Off-label uses

Battle's over? Drop the tube in a bucket and rinse sandy feet, muddy boots, dusty sandals, or the dog. A surprisingly decent camp shower for your hands after fixing a chain. I won't tell.

Printing

~230 g total. Profiles come in PLA (faster print) and PETG. PLA is perfectly fine for pool duty; PETG shrugs off sun and rough summers better. Pick your fighter.

Supports: barely. ~4 g across 4-5 parts , and they pop right off.

Every part prints in its designed orientation, already laid out in the profiles. No brims needed on textured PEI.

[Print time: ~XX h across X plates]

Assembly

If you can slide a drawer, you can build this. Everything slides in and clicks, and the full illustrated PDF guide is attached (15 pages, step by step, with check views so you always know you got it right). The only fiddly moment is seating the switch and routing two wires; ten minutes, tweezers help, the guide holds your hand through it.

Bill of materials (all from the Bambu store, links in the BOM section):

Electric Water Spray Kit 01 (the water pump module and its spare switch are not used in this build)

Silicone tube 3×5 mm, 2 m (don't cut it, the long tube is the point)

200 mm XH2.54-F to PH2.0-M conversion wire (battery extension)

Two ~10 cm offcuts of filament (you definitely have these)

Print it, grab a bottle, and go ruin someone's tan. Summer won't last forever. Your ammo will. ☀️🔫💦