Rolled pipes beat no pipes
Even the basic Rusty Pipe (x1.1 money per the creators) is pure profit over an empty slot, and pipes survive rebirths.
Fill Water Tanks Tier List
Honest status first: no S/A/B community tier list exists for Fill Water Tanks — no tracker or wiki has published one, and the developer publishes no stat tables. So this page ranks what can be ranked: the documented boosts and prices, ordered by the value-per-dollar arithmetic any player can verify in game.
The framework
Five factors that decide income
Fill Water Tanks pays water × multipliers per cycle, so every upgrade competes on exactly these axes.
| Factor | What it measures | Documented anchor |
|---|---|---|
| Cash per fill-and-sell cycle | How much one full tank pays after selling | Water in tank × Water Gain multiplier × your best pipe's money boost |
| Cycle time | Seconds to fill plus the sell drain | Fill speed scales with employees (+10% each, wiki ladder) and button workers |
| Water per cycle | Tank capacity and button boosts | Buttons from Copper +25% to Underworld +700%; tank level sets raw capacity |
| Cost per percentage point | Upgrade efficiency — price divided by the boost it buys | Documented starter prices: Water Gain $1, tank L2 $5, employee #1 $15, Roll Speed $15, Roll Luck $35 |
| Permanence | Whether the boost survives rebirth | Tank level, buttons, and pipes survive rebirth; cash upgrades and workers reset |
Documented ranking
The opening sequence, by value per dollar
Nothing in the mid or late game competes with the documented starter prices on percentage-per-dollar. This is the closest thing to an S-tier the documented numbers support.
#1 Water Tank level 2
$5 — Raises tank capacity above the 10-water level-1 cap
Source: Fan guide, checked 2026-10-03
#2 Water Tank level 3
$10 — Raises capacity to 100 water per fill
Source: Fan guide, checked 2026-10-03
#3 Water Gain
$1 for the first step — Sale multiplier starting at x1 — boosts the cash each sold unit of water pays
Source: Fan guide, checked 2026-10-03
#4 Roll Speed
$15 — Pipe-roll cooldown from 3s toward 2.8s (creators document a floor near 1.4s late-game)
Source: Fan guide, checked 2026-10-03
#5 Roll Luck
$35 — Pipe odds multiplier from x1.1 toward x1.2 per step (creators show stacked luck far beyond that)
Source: Fan guide, checked 2026-10-03
#6 Second pipe slot
$10M — A second passive pipe on your plot
Source: Fan guide, checked 2026-10-03
After the opening sequence, the value crown shifts to permanence: pipes, buttons, and tank levels survive rebirths while cash upgrades do not. A purchase that resets is a rental; a purchase that carries over is an asset. That single rule reorders the mid-game more than any raw percentage does.
Tie-breakers
Choosing between pipes and buttons
When two upgrades cost similar amounts, these documented rules pick the winner.
Luck only pays while you roll
Roll Luck raises the odds of the top bands (Rainbow x10, Dark Matter x15, Prismatic x20); Roll Speed caps how often you can roll. Creators show both stacked late-game.
Crafting trades volume for tier
The documented Underworld recipe consumes 89 rolled pipes (1 Godly + 1 Prismatic + 8 Dark Matter + 34 Rainbow + 45 Diamond) — budget for the grind, not a lucky afternoon.
Buttons are the quiet multiplier
Water-per-cycle boosts (Copper +25% up to Underworld +700%) multiply every future upgrade, which is why creators buy them before chasing pipe tiers.
Sources: Quacks and Clout Brothers walkthroughs (Aug 27, 2026), AllThings.how guide — all checked 2026-10-03.
Worked comparison
Rusty vs Copper, in the only units that matter
A sample of the framework applied to two documented pulls — ratios only, no invented prices.
The creators document the Rusty Pipe at x1.1 money and the Copper Pipe at x1.3. On two identical cycles — same tank, same Water Gain, same sell — Copper pays 1.3 ÷ 1.1 ≈ 18% more cash than Rusty, every cycle, permanently. That is what a pipe slot is worth: a compounding percentage applied to all future water. It is also why the framework ranks permanence so heavily — the rolled pipe keeps paying through rebirths, while a cash-priced upgrade of similar face value resets. Apply the same ratio logic to any two documented boosts (button +25% vs +60% water, employee +10% fill speed steps) and the "which should I buy" question becomes arithmetic instead of folklore.
FAQ
Ranking questions
Is there an official Fill Water Tanks tier list?
No. As of the October 3, 2026 check, no community wiki or major creator has published an S/A/B ranking for Fill Water Tanks pipes or buttons, and the developer has not published stat tables. This page therefore ranks what is checkable: documented boosts per documented dollar.
What is the best pipe in Fill Water Tanks?
By documented money boost: Prismatic (x20) is the top rolled pipe, with the crafted Underworld Pipe (~x40) above it — the Quacks walkthrough calls it the second-best money pipe in the game. Every rung below still beats an empty slot, and pipes survive rebirths.
What should I buy first for the best value?
The documented starter prices are the cheapest boosts per dollar in the game: Water Gain $1, Tank level 2 $5, employee #1 $15, Roll Speed $15, Roll Luck $35. In percentage terms nothing later competes with that opening sequence.
Why rank by cost per percentage point?
Because that is the only comparison the documented numbers support. Boosts are published as percentages (x1.1, +25%, +10% fill speed) and prices are visible in game — dividing one by the other is arithmetic, not opinion.
Methodology note
This page deliberately publishes no invented S/A/B rows. When a community ranking appears (the Fandom wiki and creator channels are the likely homes), it will be credited per row with its checked date. Until then, the value-per-dollar framework above uses only documented prices and boosts: AllThings.how guide (updated Aug 27, 2026), Fill Water Tanks Wiki on Fandom, and the Quacks walkthrough (Aug 27, 2026) — checked 2026-10-03.