Fit From Above. Finish Faster.
The revolutionary tap and waste fitting system that eliminates under-sink installation entirely. Designed by plumbers, for plumbers — engineered to save time on every job.
Drop in from above — no under-sink access required to fit waste
Patented lock engages — leak-tight mechanical seal
Connect trap — silicone-free. Job done.
Built to make your work easier
INSTALL FROM ABOVE
Drop the waste or tap in from the top. No reaching around under cabinets. No holding parts in place from below.
SAVE TIME EVERY JOB
Tradespeople report saving 10-20 minutes per install. Over a working week, that's hours back in your day.
NO SILICONE NEEDED
Patented dual mechanical sealing creates a leak-tight result without mess, wait time, or sealant.
FULL PRODUCT RANGE
Basin, kitchen, bath, shower wastes. Kitchen and bathroom taps. One system across every fitting.
WORKS IN TIGHT SPACES
Access issues are eliminated. Install comfortably even in the most restricted under-sink environments.
DESIGNED BY PLUMBERS
Every decision made with real-world install challenges in mind. Problems that tradespeople actually face.
Four steps. Done.
POSITION FROM ABOVE
Place the waste body or Top-Fix Tap into the sink hole from above the sink.
Drop & Align
Top-Fix self-aligns and drops into place within the sink aperture. Simple and accurate.
Lock into place
Secure the fitting from above using the Top-Fix locking mechanism. No under-sink tightening needed.
Connect & Done
Connect your product to the mains, trap or drain as usual. Leak-tight seam guaranteed - no silicone required.
Old way vs. Top-Fix
THE OLD STRUGGLE
Crawl under cabinet on hands and knees
Hold parts in place above and below while tightening
Apply silicone sealant — messy and slow
Risk of cross-threading
THE SOLUTION
Stand at the sink — no crawling
Drop in from above, self-aligns
Mechanical seal — no silicone
Under 5 minute install time
Basin Install
Crawl under cabinet on hands and knees
Hold parts in place while tightening
Apply silicone sealant — messy and slow
Risk of cross-threading
Basin Install
Stand at the sink — no crawling
Drop in from above, self-aligns
Mechanical seal — no silicone
Under 5 minute install time
The Tap Install
Crawl under cabinet on hands and knees
Hold parts in place while tightening
Work around existing pipework and sink
Risk of cross-threading and Working Lose
The Tap Install
Stand at the sink — no crawling
Drop in from above, self-aligns
Mechanical seal — locks in place
Under 5 minute install time
The complete Top-Fix system
POPULARBasin Wastes
Slotted and unslotted. Push close/release plug, removable for cleaning. Three premium finishes.
View range →
BESTSELLERBath Wastes
Bath and overflow both use Top-Fix. Domed covers blend into the design. Four finishes.
View range →
3 STYLESBathroom & Cloakroom Taps
Utilising Top-Fix - our patented fitting system, Top-Fix taps are easy to fit from above in less than 3 minutes!
View range →
Kitchen Strainer Wastes
Push-down strainer waste. Fits standard 90mm holes, accepts all 11½" traps. Available in four finishes.
View range →
Kitchen Taps
Top-Fix technology extended to taps. Same above- sink install method. Fast and precise.
View range →
Shower Wastes
Sleek fast-flow design. Secure from one side only. Removable debris catcher.
View range →Try Top-Fix for free.
We're giving away £15,000 worth of Top-Fix products to UK tradespeople. Sign up, get a free basin waste sent directly to you, and try it on a real job. Love it? Post a short video review and enter our monthly prize draw to win a site radio of your choice.
Find your nearest stockist
Find Top-Fix near you
Enter your postcode to find your nearest stocking merchant
Buy Top-Fix Online
2026 trade show dates
Come and try Top-Fix hands-on. Our team will walk you through it on the stand.
Installer Show
Birmingham • 30,000+ attendees
NEC BIRMINGHAMScrewfix Live
Farnborough • 30,000+ attendees
SCREWFIXProduct Video & downloads
Common questions & troubleshooting
Top-Fix wastes fit all standard UK sink and basin holes — 90mm for kitchen Strainers, 45mm for basin. The patented adapter accommodates slight variations in hole diameter and material thickness. For non-standard fittings, contact our technical team.
All Top-Fix products are supplied with a fitting tool... Don't worry if you lose it, the fixing types are generic!
Top-Fix Taps fit through a 35mm bore hole. The are suitable for mounting surfaces between 0.5mm and 45mm. This ensure Top-Fix can work on all counter types. (note; there is no maximum thickness of mounting surface for Top-Fix)
Top-Fix wastes are compatible with standard UK fittings and Traps
To be updated!!
No more wasted time.
Join thousands of UK tradespeople who've made the switch. Try it free.