Sink, Square, Polypropylene Plastic Black for Pharma & Lab

Quick Answer: The Sink, Square, Polypropylene Plastic Black is a square-plan laboratory sink bowl made of black polypropylene (PP), fitted at benches, service islands and preparation areas in pharmaceutical and teaching laboratories where a compact bowl that lines up with modular cabinets is wanted.

Why Choose a Square Bowl

A square polypropylene sink has equal sides, so it can be set into a bench either way round and lines up neatly with modular cabinets, which are built on a square grid. Straight walls and square corners give more usable floor than a round or oval bowl of the same width, which helps when a flat tray or a rack of tubes has to be rinsed, and the worktop cut-out needs only four straight cuts rather than a curved template.

The bowl is black polypropylene, the same plastic used for fume-hood liners, acid-waste pipes and drain traps. PP copes with the ordinary run of bench chemicals, such as dilute mineral acids, caustic solutions and salts, and it never rusts. It is, however, a thermoplastic: very hot liquids distort it, and a few strong oxidisers and solvents attack it.

Size is not stated in the listing, and square lab sinks are made in several sizes, so measure the cabinet and bench before ordering. If the bench plan calls for a different bowl, the medium black PP sink is the related model in the same range.

Where Square Sinks Are Fitted

• Bench sinks in modular teaching labs built on a square cabinet grid.
• Rinsing flat trays, staining racks and tube racks.
• Sample preparation areas in pharmaceutical QC labs.
• Island service units where the bowl is reached from more than one side.

Specifications

Care & Handling

• Seal the rim to the worktop with a sealant suited to plastics so water cannot track into the cabinet.
• Wipe out the square corners during cleaning; residue collects there first.
• Run water while pouring any dilute acid or alkali, and never leave concentrated reagents standing in the bowl.
• Keep burners and heat guns off the rim.

Why Choose LabEquip

Lab furniture makers and project buyers equipping modular benches choose square PP sinks because the bowl drops into standard cabinet widths without custom work. LabEquip lists this sink in General Lab Products, and the matching bottle trap and hose pipe for PP sinks completes the drain; send your cabinet size via the contact page.

Frequently Asked Questions

What is the advantage of a square sink over a round one?

A square bowl gives more usable flat floor for its width, takes trays and racks more easily and lines up with square modular cabinets. It also needs only straight cuts in the worktop.

Is a black PP sink resistant to acids?

Polypropylene resists most dilute acids and alkalis well. Strong oxidising acids in concentrated form, such as nitric or chromic acid, can attack it, so they should be diluted or collected as waste rather than poured neat.

Can the sink be installed from above or below the bench?

Both methods are used for plastic lab sinks: dropped in from above with the rim resting on the worktop, or fitted from below in a welded or bonded PP bench. The rim style decides which suits, so compare it with your worktop material.

Will a square polypropylene sink stain?

Black PP hides most dye and indicator marks. Stubborn deposits can usually be lifted with a suitable dilute cleaning solution followed by thorough rinsing, but abrasive powders should not be used because they roughen the surface.

What size is the square sink?

The size is not stated in this listing, and square lab sinks are made in several sizes. Please confirm the inner dimensions and depth at enquiry, together with the outlet diameter for the trap.

Can hot water from a mixer tap run into it?

Yes, ordinary hot water from a mixer is fine for polypropylene. What should be avoided is boiling water or hot concentrated solutions poured straight into the bowl.

Last Updated: September 2026