What are good alternatives to a Waterworks bathtub?

Q: What are Waterworks freestanding tubs made of?

Waterworks lists cast iron (Voltaire, Candide, with enameled interiors), composite (the .25 line) and solid marble (the Ibla, which it describes as sculpted from a solid block of Italian marble). Published list prices on the pages reviewed run from $11,450 to $40,090.

Q: Does Waterworks sell a solid stone tub?

Yes. Waterworks lists the Ibla, a 67 x 32-1/2 x 23-1/2 in freestanding oval it describes as sculpted from a solid block of Italian marble, at 1,122 lb and from $40,090. That makes it a direct comparison for any solid stone tub.

Q: Who is a Waterworks tub best for?

Buyers designing a whole bath around one house, who want coordinating fixtures, faucets and tile from a single source, with trade pricing available to designers and a product expert on call.

Last updated November 2026.

Quick answer

Waterworks Ibla (solid marble): 67 x 32-1/2 x 23-1/2 in, 1,122 lb, from $40,090
Waterworks Voltaire (cast iron): 67 x 31 x 24 in, from $11,660
Waterworks Candide (cast iron): 66 x 27 x 27 in, from $11,450
Waterworks .25 (composite): 70 x 40 x 29 in, from $16,510
Kohler Volute (cast iron): 407 lb, $4,423.91 on kohler.com, Jan 2026
Pietra Fonte: Made to order, exact size and weight in the quote

Waterworks sells freestanding tubs in cast iron, composite and solid marble, so the best alternative depends on the material. Kohler, Aquatica and Badeloft cover cast iron and composites with published weights and prices. For stone, Waterworks itself sells a 1,122 lb marble tub, and other makers of carved stone tubs exist, including Pietra Fonte.

Get a quote with exact size and weight

What are Waterworks freestanding tubs made of?

Waterworks sells freestanding tubs in cast iron, composite and solid marble. Its Voltaire and Candide are cast iron with a white enamel interior; the Candide page says it is constructed of the finest cast iron, and the Voltaire is available with a burnished exterior or a primed exterior that must be painted before installation. The .25 tub is, in Waterworks' words, made of composite material. The Ibla is sculpted by artisans from a solid block of Italian marble, shown in Carrara.

Weights for the cast iron and composite tubs were not on the pages reviewed; the Ibla lists 1,122 lb.

Planning a stone bathtub?

Tell us about the room. We reply within one business day with options, and every quote gives the exact dimensions and weight of the piece.

What sizes and prices does Waterworks publish?

Waterworks shows list prices on each product page, with "From" pricing that varies by finish, and offers trade pricing after login. The figures below are from pages archived between August and December 2025 and should be rechecked on waterworks.com.

Voltaire cast iron, 67 x 31 x 24 in: from $11,660
Candide cast iron, 66 x 27 x 27 in: from $11,450
.25 composite, 70 x 40 x 29 in: from $16,510
Ibla solid marble, 67 x 32-1/2 x 23-1/2 in, 1,122 lb: from $40,090

Which makers sell freestanding tubs in the same materials?

The table groups other makers by material. Every figure is what that maker publishes.

Maker and model	Material	Size (in)	Published weight	Published price
Waterworks Voltaire	Cast iron, enamel interior	67 x 31 x 24	Not shown on page	From $11,660
Kohler Volute K-29329	Enameled cast iron	70-7/8 x 30-3/8	407 lb	$4,423.91 (list $5,898.55)
Kohler Artifacts K-21000-W	Enameled cast iron	66-1/8 x 32-1/2	396.2 lb	Not verified
Waterworks .25	Composite	70 x 40 x 29	Not shown on page	From $16,510
Aquatica Lillian 72 in	AquateX solid surface	72.25 x 39.5 x 31.25	298 lb	$9,959
Badeloft BW-01-L	Stone resin	66.9 x 33.5 x 22	341 lb	$3,390
Waterworks Ibla	Solid marble	67 x 32-1/2 x 23-1/2	1,122 lb	From $40,090
Pietra Fonte	Solid natural stone, one block	Exact size in quote	Exact weight in quote	Not published yet

Sources: Waterworks pages (archived Aug to Dec 2025), Kohler spec sheets and kohler.com (Jan 2026), Aquatica and Badeloft product pages (Nov 2026).

Badeloft calls its material stone resin and Aquatica calls its AquateX a solid surface of mineral and acrylic resins. Kohler's cast iron sheets give a minimum floor load: 61.2 lb/ft² for the Volute and 90 lb/ft² for the Artifacts.

Does Waterworks sell a solid stone tub?

Yes. The Ibla is Waterworks' solid marble tub, described on its page as sculpted by artisans from a solid block of Italian marble and exclusive to Waterworks, 1,122 lb, from $40,090. Anyone considering carved stone should price it alongside other makers, since stone tubs differ in stone, wall thickness and size.

Pietra Fonte makes solid stone tubs to order from a single block, specified with the buyer or designer, in marble, travertine and onyx. US sellers publish solid stone tubs at about $7,930–$37,000 as of October 2026, with rare onyx above $50,000 (see marble tub cost).

Stone resin versus solid stone: composite compared with carved stone.
Stone versus acrylic: how stone differs from lighter tubs.
Cast iron bathtubs: the closest comparison to Waterworks' Voltaire and Candide.
Stone Forest alternatives: other makers of carved stone tubs.

How does a solid stone tub compare on weight with cast iron?

A solid stone tub weighs about 1,100–2,500 lb empty. Kohler's cast iron Volute is 407 lb, and Waterworks' Ibla marble is 1,122 lb, at the light end of the stone range. A typical 67 x 31 x 22 in oval marble tub with 2.5 in walls is about 1,150 lb empty and about 1,960 lb filled with a 200 lb bather, around 170 psf on its footprint against 40 psf typical residential floor live load.

Cast iron tubs also need a floor check, but stone changes the scale. See the stone tub weight guide and have a structural engineer review the framing.

Who is a Waterworks tub best for?

Waterworks suits buyers designing a whole bathroom around one house, with coordinating faucets, tile and accessories listed on the same product pages, trade pricing for designers, and a product expert available by phone. Its range runs across cast iron, composite and marble.

Another maker may fit better when the brief is a stated budget, a published weight for every tub, or a size and stone chosen from scratch. A licensed plumber and local code should confirm installation details for any tub.

What does a Pietra Fonte quote include?

Pietra Fonte tubs are made to order from a single block of natural stone. Each piece is specified with the buyer or designer, inspected with photos and video before it ships, and delivered white-glove anywhere in the contiguous US. Every quote gives the exact dimensions and weight of the piece, so the structural conversation can start from real numbers. See the marble, travertine and onyx tub collections, or ask for a sample book. Designers and builders can use the trade page.

Sources

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