Our water-saving sinks are easy to install. They encourage handwashing and pay for themselves!

Sink Twice

This sink is for toilets tanks 14" - 16.8" wide measured with the tank lid off, but the expansion kit (sold separately) allows this sink to fit toilets tanks up to 21.5" wide!

Sink Again

Our medium-sized water-saving sink is generally fitted with 1.6 GPF toilet tanks and some 1.28 GPF tanks that are 17" -19.5" wide in the back, but 14" - 17.5" in the front (measured with the tank lid off).

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For large rectangular toilet tanks:

Sink Bigger

This sink is 19.5" x 9.25" and is generally a good fit for rectangular toilets tanks made before 1995. For toilet tanks larger than 19.5", Sink Twice with the expander kit is the best solution.

Custom sinks for top button systems

Customize my Sink Twice for a top button!

We can drill a hole in Sink Twice so it will function with your top button dual flush (must coordinate custom size and location of button hole with Seller). Coordinate with seller by text at 303-345-3508

Fluidmaster 400AH or 400H PerforMAX valves are recommended. Additional SinkTwice products are featured below.

Sink Twice Installation Video

Rechargeable Camping Shower

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This expansion kit allows 17" sink to fit onto toilets as large as 21" and with various shapes.

Expansion Kit for 17" Sink Twice

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