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Casoter Basin Overflow Cover Review: A neat, durable trim for standard sinks

Black Brass Basin Sink Overflow Cover Insert Hole Trim Cap Ring Kitchen Sink Decoration Spare Hole Insert Replacement
4.7
[Wide Compatibility]  Fits most wash basins; ideal for homes, hotels, malls, factories, and kitchens.
[Corrosion-Resistant Construction]  Plastic and brass construction with matte black finish resists corrosion and fading.
[Standard Fit Dimensions]  Outer Ø 30mm, inner Ø 20mm, height 10mm; fits 21–25mm overflow holes.
[Tool-Free Installation]  Push-and-click installation; slide in with a little soap, no tools required.
[Decorative Matte Finish]  Matte black finish enhances sink aesthetics and offers a stylish decorative effect.
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Home plumbing accessory that tidies and finishes sink overflows neatly. For anyone who dislikes an exposed overflow hole, Casoter Basin Overflow Cover gives an instant, low-effort cosmetic fix. Will it fit most basins and stand up to daily use?

⚡ At a Glance
  • Fit & Finish: Matt black brass-plated trim with plastic body, 30 mm outer diameter, neat appearance
  • Best for: Homeowners, landlords and maintenance teams needing a straightforward overflow trim
  • Not ideal for: Basins with overflow holes outside the 21–25 mm standard range

Matt black brass-plated overflow ring with push-fit click installation. Designed to fit standard overflow holes measuring 21–25 mm for a clean, corrosion-resistant finish.


A tidier sink surround – with matt black brass-plated trim

Construction combines plastic and brass finished in a matt black coating that resists corrosion and resists visible fading. Outer diameter measures approximately 30 mm with a 20 mm inner opening and about 10 mm height.

Creates a uniform, decorative border around the overflow hole so basins look finished and well maintained.

Fast, tool-free fitting – with a simple push-in click design

Push-in cap style secures by clicking into place; a little soap helps the feet slide in without breaking. No screws or sealants are required for standard installations.

Allows quick DIY replacement or upgrade in minutes, ideal for kitchens, bathrooms and rental property upkeep.

Reliable compatibility – thanks to clearly sized dimensions

Outer diameter approx. 30 mm and inner diameter approx. 20 mm, matching standard overflow hole sizes stated as 21 to 25 mm. Height near 10 mm helps the trim sit flush with most basins.

Offers a secure fit for most wash basins on the market, with user feedback noting consistent, reliable performance.

✨ The 4 Key Reasons for Casoter Basin Overflow Cover
  1. Matt black finish – Resists fading and keeps sink looking uniformly polished
  2. Brass and plastic build – Provides solid, lightweight trim that resists corrosion over time
  3. Standard size fit – Fits overflow holes measuring 21–25 mm without extra adapters
  4. Tool-free installation – Push-fit click design installs quickly with minimal effort
📋 Technical Details at a Glance
  • Category: Home plumbing accessory
  • Brand: Casoter
  • Material: Plastic and brass
  • Finish: Matt black
  • Outer diameter: Approx. 30 mm
❓ Frequently Asked Questions

Q: Will this fit my basin’s overflow hole?

A: Check the basin overflow hole measures within 21–25 mm; the outer diameter is about 30 mm and the inner opening about 20 mm, which matches standard sizes given.

Q: How do I install the overflow cover?

A: Simply push the cap into the overflow hole until it clicks; using a little soap helps slide the feet in without damaging them.

Q: What is the cover made from and will it tarnish?

A: Made from plastic and brass with a strong matt black finish, described as corrosion resistant and not prone to fading.

🏆 Our Verdict

Suitable for homeowners, landlords and maintenance teams who want a quick, tidy finish for standard basin overflow holes. The combination of brass-plated trim, corrosion-resistant finish and push-fit design delivers a reliable cosmetic upgrade. Durable materials and easy installation mean a practical long-term solution for upkeep and repairs.