Updated 2026-10-03 - latest player-resource update
Learn the Fill Water Tanks fill-and-sell loop, buy upgrades in documented price order, and measure your cycle pace — every table dated and sourced.
FillWaterTanks is an unofficial fan-made resource. Roblox and the game creators remain the official place for support and updates.
[💧]Fill Water Tanks is an incremental simulator on Roblox by the Numbers Going Up group (place 113,461,233,137,974), live since 2026-07-29 and sitting at 5.0M+ visits and 272,234 favorites at the 2026-10-03 check. The official description is the whole pitch: fill the water tank, sell your water to get rich, upgrade your stats for more water and money, and rebirth for huge boosts. Servers hold six players, each plot runs its own tank-button-pipe economy, and the numbers scale from a $1 Water Gain multiplier to trillion-dollar rebirth costs and a prestige system that unlocks at 15 rebirths. This site is the unofficial player manual for that loop: the cycle calculator measures your run, the fill-and-sell guide walks the first session, and every table on every page names its source and checked date.
Game last updated October 2; the Roblox page carried an "ADMIN ABUSE + UPDATE" event banner; no code has ever been verified.
Water in tank × Water Gain multiplier × pipe boost = cash per sell — then employees and buttons cut the cycle time.
Buy Water Gain ($1), tank level 2 ($5), and employee #1 ($15). They compound before the $50,000 first rebirth.
The official description names all four stages. Here is what each one actually does, per the fan guide and creator walkthroughs.
Stand on the red "Fill Tank!" button at your plot. Water flows into your tank until it hits the tank's capacity — level 1 caps at 10 water, and the on-screen prompt reads "Stand on the button to fill your tank!" (Fan guide + creators, checked 2026-10-03).
Step off the button. The tank drains automatically and every unit of water pays out as cash — the prompt flips to "Step off the button to sell your Water!" Overflowing water is wasted, so sell at max rather than idling on the button (creators).
Spend cash in the upgrade shops: tank capacity, the Water Gain sale multiplier, pipe rolls (luck + speed), buttons, and employees. The official description promises "MORE Water & Money" per upgrade.
At $50,000 cash you can rebirth: money, workers, and upgrades reset, but your water tank level, buttons, and pipes carry over, and you keep a permanent boost (the first rebirth pays a documented 50% boost plus 10 rebirth tokens to spend in the rebirth tree).
From the AllThings.how how-to guide (updated August 27, 2026), re-checked 2026-10-03. Higher tiers are on the guides and wiki pages.
| Upgrade | Documented effect | Documented price | Source |
|---|---|---|---|
| Water Tank level 2 | Raises tank capacity above the 10-water level-1 cap | $5 | Fan guide |
| Water Tank level 3 | Raises capacity to 100 water per fill | $10 | Fan guide |
| Water Gain | Sale multiplier starting at x1 — boosts the cash each sold unit of water pays | $1 for the first step | Fan guide |
| Roll Speed | Pipe-roll cooldown from 3s toward 2.8s (creators document a floor near 1.4s late-game) | $15 | Fan guide |
| Roll Luck | Pipe odds multiplier from x1.1 toward x1.2 per step (creators show stacked luck far beyond that) | $35 | Fan guide |
| Second pipe slot | A second passive pipe on your plot | $10M | Fan guide |
Each answer lives on its own page, with its own sources and checked date.
Turn one timed fill-and-sell cycle into cycles per minute, per hour, and water per hour.
CodesEvery check for a working code, dated — and why none has ever verified.
GuidesThe fill-and-sell walkthrough plus progression and farming routes.
WikiTanks, water, cash, pipes, employees, buttons, and rebirth — defined and sourced.
RankingsA value-per-dollar framework for pipes and buttons built on documented boosts.
CommunityGame page, group, the Fandom wiki — and the Trello/Discord status, checked.
From first session to prestige, the guide chain follows the documented upgrade order.
Questions this page owns, plus links to the focused pages for everything else.
Fill Water Tanks is an incremental simulator by the Numbers Going Up group (place 113461233137974), live since July 29, 2026 with 5M+ visits. You stand on a fill button to pump water into your tank, step off to sell it for cash, upgrade stats for more water and money, and rebirth for permanent boosts.
Stand on the red "Fill Tank!" button until the tank hits capacity (10 water at level 1, 100 at level 3), then step off — the tank drains automatically and pays cash per unit of water. Overflow is wasted, so sell at max. Each cycle is a few seconds once employees and buttons speed up the fill.
The documented starter prices make the order cheap to remember: Water Gain (x1 multiplier) for $1, Water Tank level 2 for $5, your first employee for $15, Roll Speed for $15, Roll Luck for $35. Each is a visible boost per dollar before the first rebirth at $50,000.
No working code has ever been verified. As of the October 3, 2026 check the official description, the developer group, the major code trackers, and even the biggest codes video all come up empty — the codes page documents each check.
No. This is an unofficial fan resource. The official Roblox game page and the Numbers Going Up group remain the places for support, purchases, and announcements.
Money, workers, and cash upgrades reset, but your water tank level, buttons, and pipes carry over, and you keep a permanent boost — the first rebirth (at $50,000) pays a documented 50% boost plus 10 rebirth tokens to spend in the rebirth tree.
Calculator · Fill-and-sell guide · Codes status · Wiki · Sources
Unofficial fan resource. Documentation check: 2026-10-03. Numbers Going Up has not published official stat tables, so game numbers here are community-documented and attributed on each page.
