Sink, Medium, Polypropylene Plastic Black for Pharma & Lab

Quick Answer: The Sink, Medium, Polypropylene Plastic Black is a mid-sized laboratory sink bowl in black polypropylene (PP), sized for bench-end rinsing, handwashing and small-glassware wash-up in pharmaceutical, school and research laboratories rather than for bulk wash-up.

Where a Medium Sink Fits in the Lab

Laboratory layouts usually need sinks of more than one size. A large bowl belongs in the wash-up room, where carboys and trays are cleaned, and a cup sink sits inside a fume hood to take small drips. The medium black polypropylene sink fills the gap between them: it is the bowl set into the end of a teaching bench, a peninsula in a QC lab or an instrument room, where people rinse a few beakers, empty titration rinse water or wash their hands before leaving.

Polypropylene is chosen for these bowls because it does not corrode, it tolerates the dilute acids, bases and salt solutions that reach a bench sink, and it can be welded, so fabricators can join a PP bowl into a PP worktop or drain line without metal fasteners. Its weak points are heat, strong oxidisers such as concentrated nitric or chromic acid, and certain chlorinated or aromatic solvents, none of which should be tipped down it neat.

Black is the usual colour for lab sinks because indicator dyes, iodine and silver nitrate marks do not show on it. The bowl dimensions, depth and outlet size of this medium model are not given in the listing and should be checked against the bench cut-out before any worktop is cut.

Specifications

Applications

• Rinsing beakers, pipettes and burettes at the end of a teaching bench.
• A handwashing point in a microbiology or pharmacy practical room.
• Emptying diluted rinse water after titrations and qualitative tests.
• Replacing a chipped ceramic or corroded steel sink of similar size.

Care & Handling

• Flush dilute acids and alkalis away with plenty of running water, so nothing concentrated sits in the trap.
• Clean with a non-abrasive cream or detergent; scouring pads leave scratches that hold stains.
• Keep hot plates and burners from standing on or against the rim.
• Collect solvents, heavy-metal residues and other hazardous waste in labelled containers for proper disposal.

Why Choose LabEquip

Lab furniture fabricators and colleges fitting out teaching benches order medium PP sinks in sets, one per bench or pair of benches. LabEquip offers this bowl alongside the large polypropylene sink meant for wash-up rooms, both in General Lab Products; share the bench width and cut-out through our contact page so the size can be matched.

Frequently Asked Questions

When should I choose a medium sink rather than the large one?

Choose the medium bowl for bench-end rinsing, handwashing and small glassware, where worktop space matters. The large sink suits wash-up rooms that clean buckets, trays and carboys, which need a deeper, wider bowl.

Can hot water or hot solutions go into a polypropylene sink?

Hot tap water is generally fine. Boiling liquids and very hot solutions should be cooled first or run in with cold water, because polypropylene softens as it nears its heat limit and can distort.

Which chemicals can damage a PP sink?

Concentrated oxidising acids such as nitric or chromic acid, and some chlorinated and aromatic solvents, can attack or swell polypropylene. Dilute acids, alkalis and salt solutions are generally handled well.

Why is a laboratory sink black?

Black hides the permanent marks left by iodine, indicators and silver salts, which would stain a white bowl. It also makes pale precipitates and clear glassware easier to see during rinsing.

Can this sink be welded into a polypropylene worktop?

Polypropylene is a weldable plastic, and fabricators routinely weld PP sinks into PP benches and fume-hood bases with hot air or extrusion welding. Whether this bowl has a rim suited to welding or to drop-in mounting is worth settling with the supplier first.

What waste fitting does the sink need?

Use a plastic trap and waste pipe, preferably polypropylene, so the whole drain run resists the same chemicals as the bowl. A metal trap under a PP sink corrodes long before the sink does.

Last Updated: September 2026