Close Coupled Toilets

Close coupled toilets are the go-to choice in most UK homes but it’s still worth knowing how they fit, what to expect and the little quirks that catch people out. These FAQs cover the basics, the practical bits and the things you should check when you install one.

 

What is a close coupled toilet?

A close coupled toilet is the classic all-in-one loo where the cistern sits neatly on top of the pan. No separate flush pipe, no fuss. Everything’s built together, which keeps the footprint tidy and makes fitting straightforward. They suit most UK bathrooms because they’re reliable, familiar and easy to live with. Due to this, it should come as no surprise that we supply these more than any other type.

 

What are the different types of close coupled toilets?

You’ve got a few shapes and styles from, with each one suiting a different sort of bathroom:

• Contemporary: These are the modern ones with clean lines and a fully shrouded base. They hide all the pipework, so you get an uncluttered finish.
• Traditional: A classic style with curved details and the option of a wooden seat. They’re ideal in period homes or if you’re trying to match existing traditional brassware.
• Back-to-wall: These sit tight against the wall and hide every pipe. They’re ideal if you want a tidy finish and don’t fancy staring at plumbing every morning.
• Open back: There’s a small gap behind the pan, which makes it easier to reach the soil pipe. This makes them handy in older homes where things aren’t always square.
• Short projection: These don’t stick out as far into the room. If your bathroom is on the small side or you’re working in a narrow en-suite, a short projection toilet is usually the safest bet.
• Corner designs: The triangular cistern lets the toilet tuck neatly into a corner, making them perfect for awkward layouts where a standard toilet won’t behave.

 

What’s the difference between a single and dual flush close coupled toilet?

With a dual flush toilet, you get two options: a smaller flush (around 3 to 4 litres) for liquids, and a larger flush (around 5 to 6 litres) for solids. You’ll use less water over time without noticing any drop in performance.

A single flush toilet uses the same amount of water every time. It does the job, but it isn’t as efficient.

If you really want a water saving close coupled toilet, some designs let you reuse greywater from your basin by feeding it into the cistern. For reassurance, look for WRAS approval. It means the toilet meets UK water efficiency standards and has been tested for safe performance.

 

How do rimmed and rimless toilets differ?

A rimmed close coupled toilet has a hidden ledge inside the bowl. Water flows under the rim to clear the pan, but that same ledge can trap grime and bacteria; you’ll need to get your toilet brush right under there.

A rimless toilet removes that ledge completely. The flush washes the bowl directly, which makes it easier to clean and more hygienic.

 

Can a close coupled toilet be fitted over existing plumbing?

Usually, yes. As long as your soil pipe lines up with the outlet on the new toilet, it’s a simple swap. Most homes already use standard horizontal or vertical connections, so you’ll often be fine.

If the outlet sits higher or lower than your current setup, a plumber may need to tweak the pipework. It’s a quick job and well worth it to get a proper seal and a snug fit.

 

Why might a close coupled toilet not sit fully against the wall?

A few things can leave a small gap. Open back toilets are designed that way so you can reach the pipework behind. In older homes it can often be due to skirting boards, awkward soil pipe angles or a water inlet that sits in the wrong spot.

A back to wall close coupled toilet usually solves this. Alternatively, your plumber can shift the inlet or trim the skirting so the pan tucks in neatly.

 

Is it possible to retrofit a close coupled toilet?

Yes, you can retrofit one in most cases. They bolt to the floor and connect to standard UK plumbing. That’s why they’re a popular choice for quick bathroom refreshes and DIY upgrades.

Success depends on your current soil pipe direction and alignment. If the pan outlet doesn’t match what you’ve already got, you might need a small pipe adjustment. Once that’s sorted, the rest is easy.

 

Are flush and inlet valves standardised?

They’re often similar but not fully standard. Many modern close coupled toilets use widely available valves that follow common UK sizes, especially if they’re WRAS approved.

Some brands use their own fittings, though. If you ever need a replacement, it’s best to check the product spec or ask a plumber. A like-for-like part keeps everything working smoothly.