--- title: What Are the Parts of a Kitchen Faucet? date: 2026-05-10T00:00:00Z modified: 2026-05-15T09:46:53Z permalink: "https://www.aimfaucet.com/blog/tech/kitchen-faucet-components/" type: post status: publish excerpt: "" wpid: 3146 categories: - Tech featured_image: "https://www.aimfaucet.com/wp-content/uploads/2026/05/image08.webp" featured_image_alt: Explaining main kitchen faucet components and parts timestamp: 2026-05-15T09:46:53Z tags: - Tech --- The main parts of a kitchen faucet include the spout, handle, aerator, cartridge, and mounting hardware. Some models also have pull-out sprayers and diverter valves. Knowing what each part does helps when sourcing fixtures or handling returns. ## **What Are the Visible Kitchen Faucet Components?** These are the parts customers see and use daily. ### **Spout** The spout delivers water into the sink basin. Gooseneck and high-arc styles leave room for filling tall pots. Lower profiles fit better under cabinets with limited clearance. Commercial buyers tend to ask about reach and height. If these dimensions are off, the water stream misses the basin center. ### **Handle or Lever** The handle controls flow and temperature. [Single-lever designs](https://www.aimfaucet.com/product/chrome-kitchen-sink-faucet-with-level-handle-dg16750/) adjust both at once. Two-handle setups keep hot and cold separate. Since the handle connects directly to the cartridge, any stiffness or wobble usually traces back to that internal part. ### **Aerator** This small mesh screen screws onto the spout tip. It mixes air into the water stream, which cuts down on splashing and keeps the flow around 1.8 GPM. Mineral buildup clogs aerators over time. A vinegar soak takes care of it, but many customers assume something more serious is wrong. ## **What Are the Internal Parts That Control Water Flow?** The components of a kitchen faucet hidden inside the body do most of the work. These parts determine how long the fixture lasts. [ ![DG09310](https://www.aimfaucet.com/wp-content/uploads/2026/03/Chrome-3-Section-Swivel-Kitchen-Faucet-DG20653-3.webp) ](https://www.aimfaucet.com/product/chrome-3-section-swivel-kitchen-faucet-dg20653/) Chrome 3-Section Swivel Kitchen Faucet DG20653 DG20653 Chrome 3-Section Swivel Kitchen Faucet: IF Design winner, 3 spray modes, brass body. Ideal for wholesale, OEM & ODM supplier partnerships. [View New Product](https://www.aimfaucet.com/product/chrome-3-section-swivel-kitchen-faucet-dg20653/) ### **Cartridge or Valve Core** The cartridge blends hot and cold water inside the faucet body. It’s the central piece of modern [kitchen mixer tap](https://www.aimfaucet.com/product/black-single-lever-kitchen-mixer-tap-dg01150/) components. Ceramic disc cartridges use two hardened discs that slide against each other. Good ones handle 500,000+ cycles before wearing down. Rubber washer designs don’t last nearly as long. For more on how these work, see this guide to [faucet valve functions](https://www.aimfaucet.com/wp-content/uploads/wp-mfa-exports/post/faucet-valve-functions.md). ### **O-Rings and Seals** Small rubber rings that prevent leaks between moving parts. They sit at the spout base and around the handle stems. O-rings dry out and crack with age. When water pools at the faucet base, this is usually the cause. Plumber’s grease during assembly extends their life. ### **Seats and Springs** These sit inside the cartridge housing and keep the seal tight when the handle is off. Dripping faucets with the handle closed often point to worn seats or springs. ## **What Are the Components of a Tap Called Under the Sink?** The sink faucet components are beneath the counter handle, mounting, and water supply. - **[Supply lines](https://www.aimfaucet.com/wp-content/uploads/wp-mfa-exports/page/faucet-supply-line-size-guide.md):** Braided stainless steel hoses connecting to hot and cold valves. They flex better than rigid copper in tight spaces. - **Mounting hardware:** The nut, washers, and shank that hold the faucet to the sink deck. Brass lasts longer than stamped metal. - **Escutcheon plate:** Covers unused holes when installing a single-hole faucet on a three-hole sink. Also blocks water from seeping underneath. - **Check valve:** Stops backflow if pressure drops. Many commercial codes require these. ## **What Extra Parts Do Pull-Out and Spray Faucets Have?** Modern kitchen tap components include extra pieces when sprayers are involved. ### **Spray Head** The detachable head switches between stream and spray. Some models include pause or blade settings, too. A rubber gasket inside the head wears over time. When it goes, water leaks back through the spout instead of the sprayer. ### **Spray Hose and Weight** The hose runs up through the faucet body. Under the sink, a counterweight pulls the sprayer back into place after use. When sprayers won’t retract, the weight is usually hitting pipes or storage below. Browse [pull-out kitchen faucets](https://www.aimfaucet.com/product/pull-out-kitchen-tap-with-3-spray-modes-dg21057-1/) to see how different models handle this. ### **Diverter Valve** This valve routes water between the main spout and spray head. When diverters wear out, you get a weak spray or water from both outlets at once. ## **Why Does Material Choice Matter for Water Faucet Components?** Material quality affects how many units come back as warranty claims. Here’s what you can choose from: - **Solid brass bodies** resist corrosion and handle temperature swings. Zinc alloy and plastic fail earlier, especially in humid kitchens. This guide on [brass grades for faucets](https://www.aimfaucet.com/wp-content/uploads/wp-mfa-exports/post/brass-grades-faucets.md) explains the differences. - **Ceramic disc cartridges** keep their seal through hundreds of thousands of cycles. Rubber washers compress and wear faster. - **Multi-layer plating** holds up to cleaning chemicals better than thin finishes. ## **Which Parts Cause the Most Returns?** Knowing where failures happen helps when evaluating suppliers and setting customer expectations. - **Low pressure:** Usually a clogged aerator. Mineral deposits build up over time, especially in hard water areas. A vinegar soak clears it, but customers often assume something bigger is wrong and request a replacement. - **Dripping when closed:** Worn cartridge or degraded seats and springs. In single-handle faucets, the cartridge is almost always the culprit. - **Base leaks:** O-rings dried out or cracked. This happens faster in hot or dry climates. Replacing the O-ring and applying plumber’s grease usually solves it. - **Loose handles:** The set screw hidden under the decorative cap needs tightening. A hex wrench fixes it in seconds, but customers don’t always know where to look. - **Sprayer won’t retract:** The counterweight under the sink is hitting pipes or stored items. Repositioning it usually gets things working again. ### **How Does AIM Test Kitchen Faucet Components?** AIM follows ISO 9001 with ERP batch tracking from raw brass through final assembly. What gets checked: - **Incoming materials:** Over 20 testing devices verify brass and components. Third-party testing adds another check. - **Production:** Wall thickness, CNC tolerances, and valve torque tracked across 30+ machines. - **Finished units:** 100+ units per batch inspected for leaks, flow, and plating thickness. - **Durability:** 200-hour salt spray for corrosion. Cartridges tested past 500,000 cycles. AIM faucets are not only engineered for performance but also internationally recognized with [Red Dot Award](https://www.aimfaucet.com/wp-content/uploads/wp-mfa-exports/post/red-dot-design-award-basin-faucets.md) an [iF Design Award](https://www.aimfaucet.com/wp-content/uploads/wp-mfa-exports/post/if-design-award-kitchen-faucet.md) for outstanding design excellence. [Certifications](https://www.aimfaucet.com/wp-content/uploads/wp-mfa-exports/page/certificates.md) include CE, WRAS, ACS, and NSF, depending on the market. Everything ships with a 5-year warranty. See the full [quality process](https://www.aimfaucet.com/wp-content/uploads/wp-mfa-exports/page/quality.md) for details.