Last year in a Victorian terrace in Bristol, I walked into a bathroom where the homeowner was staring at a clogged, rusted shower drain cover that hadn’t been replaced since the house was built in 1892. Water was pooling around her feet every time she showered, and hair was backing up into the waste pipe like a furry dam. She’d tried every DIY cleaner on the market, but the real issue wasn’t just grime—it was a mismatched, corroded grate that no longer sealed properly with the modern linear drain beneath it. That day, we didn’t just swap out a cover; we upgraded her entire drainage system to meet current UK Building Regulations, eliminated standing water, and restored both function and style. It’s stories like this that remind me why choosing the right shower drain cover matters—not just for aesthetics, but for hygiene, safety, and long-term plumbing health. Whether you’re renovating a period property or installing a sleek wet room, this comprehensive guide consolidates everything you need to know about shower drain covers in the UK for 2025—from types and materials to precise installation steps, replacement tips, sizing standards, and where to buy reliable products from trusted suppliers like B&Q, Screwfix, and Toolstation. For comprehensive shower drain installation procedures, see our complete installation guide.
Quick Steps: Choosing & Installing a Shower Drain Cover
1. Identify your drain type (point, linear, or slot).
2. Measure the internal aperture—not the outer flange.
3. Match material to environment (stainless steel for wet rooms, brass for traditional baths).
4. Ensure compliance with Part G (sanitation) and Part H (drainage) of UK Building Regulations.
5. Use silicone sealant, not mastic, for waterproofing.
6. Test flow rate after installation—should clear within 30 seconds.
7. Fit a hair strainer if household has long hair or pets.
Understanding Shower Drain Cover Types: Point, Linear & Slot
Not all shower drains are created equal—and neither are their covers. The type of drain you have (or plan to install) dictates everything from performance to aesthetic integration. In my 12+ years as a NICEIC Part P-certified plumber across London, Manchester, and Edinburgh, I’ve seen countless mismatches between drain bodies and covers, leading to leaks, slow drainage, and costly call-backs. Let’s break down the three main types of shower drain covers used in UK homes today.
Point Drains: The Classic Centre Drain
Point drains—also called central or traditional drains—are the most common type found in older UK bathrooms and standard shower trays. They’re typically circular, located in the centre of the shower base, and connect directly to a vertical waste pipe. These drains usually have a diameter of 50mm or 65mm, though some premium models go up to 80mm for higher flow rates.
The cover for a point drain is often a removable grate with perforations or slots designed to catch large debris while allowing water through. I once replaced a point drain in a 1987 bungalow where the original plastic grate had warped over time, creating a gap that allowed water to seep into the subfloor. The fix? A stainless steel FloWise 10235 (ÂŁ58 at Toolstation), which not only sealed perfectly but also resisted corrosion from constant moisture exposure.
Point drains work best in enclosed shower cubicles with modest flow rates. However, they can struggle in large wet rooms or high-usage households unless paired with an oversized trap and adequate fall (minimum 1:60 slope as per Part H). Always verify the internal diameter of your existing drain body before buying a replacement cover—many homeowners mistakenly measure the outer flange, leading to ill-fitting grates.
Linear Drains: Sleek, Modern & High-Performance
Linear drains—sometimes called trench or strip drains—have surged in popularity across UK renovations and new builds since 2020. Instead of a single central outlet, these run along one wall (usually the back or side) and allow water to flow evenly across a wider surface area. This design reduces pooling, improves accessibility (ideal for wheelchair users), and gives a minimalist, contemporary look.
Linear drain covers come in two main styles: solid metal grates (often with narrow slots) or tile-in frames that let you continue your wall or floor tiles seamlessly over the drain. I installed a Schluter®-Kerdi linear system in a Chelsea penthouse last year—the client wanted a completely flush finish. We used a 1200mm stainless steel grate with a brushed finish (£142 from specialist supplier Wetroomstore.co.uk), and it’s performed flawlessly under daily use.
Key considerations for linear drains:
– Minimum fall of 1:80 along the length (per BS EN 12056-3)
– Must be paired with a compatible linear drain body (don’t try to retrofit a point drain!)
– Covers must be removable for cleaning—avoid fixed tile-in designs unless you’re committed to professional maintenance
For comprehensive guidance on integrating linear drains into wet rooms, see our wet room drainage solutions guide.
Slot Drains: The Invisible Drain Trend
Slot drains are the latest evolution in discreet drainage. As the name suggests, they appear as a thin, almost invisible slit in the floor—typically just 8–15mm wide—and are hidden beneath tile or stone. Popular in luxury renovations and hotel-style bathrooms, slot drains offer maximum design flexibility but require precise installation.
The “cover” in this case is often just a narrow stainless steel frame that sits flush with the flooring. Because there’s no traditional grate, debris control relies entirely on a downstream hair trap or strainer. I recommend pairing slot drains with an inline filter—I use the McAlpine SF17L (£24 at Screwfix) in most installations. Without it, hair and soap scum can accumulate unseen, leading to blockages that are expensive to access.
⚠️ Warning: Slot drains are not DIY-friendly. Improper slope or misalignment can cause water to bypass the drain entirely. Always consult a qualified installer and ensure the system meets Part H requirements for flow capacity (minimum 0.6 litres per second).
Shower Drain Cover Materials: Stainless Steel, Brass, Plastic & Glass Tile-In
The material of your shower drain cover isn’t just about looks—it directly impacts durability, maintenance, and compatibility with your bathroom environment. In the UK’s damp climate, choosing the wrong material can lead to rust, warping, or premature failure. Here’s my professional breakdown based on real-world performance.
Stainless Steel: The Gold Standard for Wet Areas
Grade 304 or 316 stainless steel is my top recommendation for nearly all shower applications. It resists corrosion, handles temperature swings, and maintains its finish for decades. The FloWise 10235 I mentioned earlier is 304 stainless—polished to a mirror finish, yet tough enough for family use.
For coastal properties or high-humidity environments, opt for 316 marine-grade stainless (£75–£120 depending on size). I fitted a 316 linear grate in a Brighton seafront apartment, and after two years of salt-laden air, it looks brand new.
Avoid cheap “stainless-look” coatings—they peel within months. Always check the product description for actual grade specification.
Brass: Elegant but High-Maintenance
Solid brass covers offer a warm, traditional aesthetic perfect for period restorations. However, untreated brass tarnishes quickly in humid bathrooms. Most quality brass grates come with a lacquer coating (e.g., the Heritage Brass HB-650, ÂŁ89 at B&Q), but this wears off over time, requiring regular polishing.
I only specify brass in low-traffic heritage properties where the client understands the upkeep. In modern homes, it’s often more trouble than it’s worth.
Plastic (ABS/PVC): Budget Option with Limits
Plastic grates are common in budget shower trays (£12–£25 at Toolstation). While they’re lightweight and rust-proof, they degrade under UV light (from windows) and can warp with heat, creating gaps that leak water into subfloors.
I replaced a warped PVC grate in a rental flat last month—the tenant had no idea water was seeping into the ceiling below. Cost to repair the damage? Over £800. Lesson: spend a little more upfront.
Glass Tile-In Covers: For Seamless Luxury
These allow you to set glass tiles directly into the drain frame, creating a continuous surface. Beautiful—but fragile. I installed a glass tile-in cover in a Mayfair townhouse, and within six months, a guest dropped a shampoo bottle, cracking the tile. Replacement required removing surrounding tiles—a £300 job.
Only use in low-impact areas and always specify tempered glass.
Step-by-Step: Installing a Shower Drain Cover (UK Standards)
Installing a shower drain cover seems simple—but get it wrong, and you’ll face leaks, mould, or regulatory non-compliance. Follow this field-tested method I use on every job.
⚠️ Safety First: Turn off water supply and wear gloves—old traps may contain harmful bacteria or sharp edges.
Tools & Materials Needed
- Silicone sealant (neutral cure, bathroom-grade)
- Adjustable spanner
- Spirit level
- Measuring tape
- Wire brush (for cleaning old flanges)
- New O-ring or rubber gasket (if required)
Installation Steps
1. Remove the old cover: Unscrew or lift out the existing grate. Clean the flange thoroughly with a wire brush—any residue will prevent a watertight seal.
2. Check alignment and fall: Use a spirit level to ensure the drain body is properly sloped (1:60 minimum). If not, you may need to adjust the tray or subfloor—this is critical for compliance with Part H.
3. Apply sealant: Run a continuous bead of silicone around the top edge of the drain body—not the cover itself. Use neutral cure silicone to avoid damaging metal finishes.
4. Position the new cover: Lower the grate evenly onto the flange. Press down firmly to embed it in the silicone. Wipe excess immediately.
5. Secure if required: Some covers use screws—tighten evenly to avoid warping. Never overtighten.
6. Cure and test: Allow 24 hours for silicone to cure. Then run water for 2 minutes—it should disappear within 30 seconds. If not, check for blockages or insufficient fall.
For detailed diagrams and trap replacement procedures, visit our shower trap replacement guide.
Replacing Old Shower Drain Grates: Common Pitfalls & Fixes
Replacing a shower drain cover isn’t just about swapping parts—it’s often the first step in solving deeper drainage issues. Over the years, I’ve encountered three recurring problems during replacements.
Problem 1: Mismatched Sizes
Homeowners often buy a cover that looks right but doesn’t fit. Always measure the internal diameter of the drain body—not the outer rim. Standard UK sizes are 50mm, 65mm, and 80mm for point drains; linear drains are measured by length (600mm, 900mm, 1200mm).
Problem 2: Corroded Threads or Broken Flanges
In older properties, the drain body itself may be damaged. If the flange is cracked or threads are stripped, you’ll need a universal repair kit like the McAlpine MRA1 (£32 at Screwfix) or replace the entire drain assembly.
Problem 3: Incorrect Sealant Use
Mastic or bathroom caulk will shrink and crack. Always use neutral-cure silicone—it remains flexible and waterproof for years.
UK Standard Shower Drain Cover Sizes & Compatibility
Confused by sizing? Here’s the definitive UK reference:
- Point Drains: 50mm (standard shower trays), 65mm (larger trays/wet rooms), 80mm (high-flow commercial)
- Linear Drains: 600mm, 900mm, 1200mm (custom lengths available but require specialist fabrication)
- Slot Drains: 8mm, 10mm, 12mm, 15mm width; lengths vary
Never assume compatibility—always cross-check manufacturer specs. The FloWise 10235 fits 65mm bodies; the B&Q Home Series 50mm cover won’t work in an 80mm drain.
Matching Covers to Drain Types: Avoid Costly Mistakes
A point drain cover will never fit a linear drain—and vice versa. Worse, forcing it can crack tiles or compromise the waterproof membrane. Always verify:
- Drain type (point/linear/slot)
- Connection size (e.g., 1.5″ BSP)
- Depth clearance (especially in shallow floors)
When in doubt, take a photo and consult the manufacturer or a qualified plumber.
Modern vs Traditional Styles: Aesthetic Integration
Your drain cover should complement your bathroom design—not clash with it.
- Modern: Brushed stainless, matte black PVD coating, minimalist slots
- Traditional: Polished brass, ornate cast iron, vintage patterns
I paired a heritage brass grate with clawfoot tub in a Bath renovation—perfect harmony. In a Shoreditch loft, we used a black linear slot drain for industrial chic.
Hair Trap Covers & Strainers: Prevent Blockages
Even the best cover won’t stop fine hair. That’s why I always recommend a secondary strainer:
- Pop-up strainers: Fit inside the waste pipe (e.g., McAlpine SF17L)
- Magnetic hair catchers: Sit under the grate (less effective but easy to clean)
Clean weekly—it takes 30 seconds and prevents 90% of blockages.
Best UK Suppliers for Shower Drain Covers (2025 Prices)
Stick to reputable stockists:
- B&Q: Heritage Brass HB-650 (ÂŁ89), basic ABS grates (ÂŁ15)
- Screwfix: McAlpine SF17L strainer (£24), stainless linear grates (£95–£140)
- Toolstation: FloWise 10235 (ÂŁ58), budget PVC options (ÂŁ12)
Avoid unknown eBay sellers—many sell non-compliant imports.
Cleaning & Maintenance Tips for Long-Lasting Performance
Maintenance is simple:
- Weekly: Remove cover, rinse debris, wipe with vinegar solution
- Monthly: Soak metal covers in baking soda paste to remove limescale
- Annually: Check sealant integrity—reapply if cracked
Never use bleach or abrasive pads—they damage finishes and seals.
FAQ: Shower Drain Cover Questions Answered
Q: What size shower drain cover do I need?
A: Measure the internal diameter of your drain body—common sizes are 50mm, 65mm, and 80mm.
Q: Can I replace just the cover, or do I need a new drain?
A: If the drain body is intact, yes—just ensure compatibility. If corroded or cracked, replace the whole unit.
Q: Are linear drains better than point drains?
A: For wet rooms and accessibility, yes. For small cubicles, point drains are sufficient.
Q: Do I need Building Regulations approval for a new drain cover?
A: Not for replacement-in-kind. But if altering drainage layout or installing a wet room, Part H approval may be required.
Q: How often should I clean my shower drain cover?
A: Weekly removal and rinsing prevents 90% of blockages.
Q: Can I install a tile-in drain cover myself?
A: Only if you’re experienced with tiling and waterproofing. Mistakes can cause leaks.
Q: Why is water pooling around my drain?
A: Likely causes: incorrect fall, blocked strainer, or ill-fitting cover.
Q: Are plastic drain covers safe?
A: They’re code-compliant but less durable than metal. Replace if warped.
Q: Where can I buy compliant shower drain covers in the UK?
A: B&Q, Scre