You have found the radiator you want. The colour is right, the size is right, and then you reach the last step of the order and the shop asks a question you were not expecting: angled, corner or straight valves? Suddenly a simple purchase feels like a plumbing exam.
Here is the good news. Choosing the right radiator valves comes down to one thing you can check in about ten seconds: where your pipes come from. Get that right and everything else falls into place. This guide walks you through it in plain English, so you can order with confidence and not end up with valves that point the wrong way.
The 10-second answer
- Pipes come up out of the floor? You almost certainly want angled valves.
- Pipes come out of the wall? You want corner valves (or straight valves).
- Pipes come out of the wall and you like a clean, boxy look? Straight valves.
What Do Radiator Valves Actually Do?
Every radiator needs a pair of valves, one on each side. They are not just decoration. The valve on one side controls how much hot water flows into the radiator, and the fitting on the other side, called the lockshield, balances the system so every radiator in the house heats evenly.
Because valves are the physical connection between your pipework and your radiator, their shape has to match the direction your pipes travel. That is why the same radiator can need completely different valves in two different rooms. It is nothing to do with the radiator itself, and everything to do with your pipes.
Start Here: Where Are Your Pipes Coming From?
Pipes coming up from the floor
This is the most common setup in UK homes, especially in older properties and anywhere with a suspended timber floor. The pipes rise vertically out of the floorboards and need to turn 90 degrees to enter the bottom of the radiator. That 90-degree turn is exactly what an angled valve is shaped to do.
Pipes coming out of the wall
Common in newer builds and renovations where pipes are chased into the wall. Here the pipe comes toward the radiator horizontally and needs to turn to meet the valve inlet. A corner valve makes that turn tidily and sits almost flush against the wall. If you would rather the valve run in a straight line from the wall to the radiator, a straight valve does the job instead.
Angled Valves
Angled valves make a right angle between the pipe and the radiator. Picture the control head pointing outward toward you while the pipe drops down to the floor. They are the default choice for floor-fed pipes and easily the most popular valve we sell. If you are genuinely unsure and your home is a typical UK property, angled is the safe bet.
Corner Valves
Corner valves also turn a right angle, but they are designed so the body tucks neatly into the corner where the wall meets the radiator, with the control head facing forward. They give the cleanest look when pipes exit the wall, because there is very little valve sticking out sideways. Great for a minimalist finish behind a designer radiator.
Straight Valves
Straight valves run in a single straight line with no bend at all. They suit pipes coming straight out of the wall in line with the radiator inlets, and they are also used with some floor connections where the radiator valve inlet points straight down. They have a bold, upright look that pairs well with modern square-profile radiators.
Quick Comparison
| Valve type | Best for pipes coming from | The look |
|---|---|---|
| Angled | The floor (most UK homes) | Control head points outward, pipe drops to floor |
| Corner | The wall | Tucks flush to the wall, very tidy and discreet |
| Straight | The wall, in line with the radiator | Bold, upright, suits square modern radiators |
See the Three Side by Side
These three thermostatic sets show the shape difference clearly. Same finish, three different pipe directions, so you can match yours at a glance.
Browse the full range in all radiator valves if you want to compare finishes and styles across every shape.
One More Choice: Manual or Thermostatic?
Valve shape is about your pipes. Valve type is about how you want to control the heat, and it is a separate decision.
- Thermostatic valves (TRVs) sense the room temperature and dial the radiator up or down automatically. They are the easy way to stop rarely used rooms cooking while the living room stays comfortable. Explore the range of thermostatic radiator valves.
- Manual valves work like a tap: you set them by hand. Simple, reliable and often chosen for a cleaner traditional look. See the manual radiator valves.
Both come in angled, corner and straight shapes, so you never have to trade the control you want against the fit you need.
Three Common Mistakes to Avoid
- Guessing the shape without looking. Take thirty seconds to actually check where your pipes emerge before you order. It is the single thing that decides everything.
- Assuming both sides are the same. They are. Valves are sold in pairs precisely because a radiator always needs one flow valve and one lockshield, so buy the set rather than a single valve.
- Forgetting pipe centres. The gap between your two pipes should line up with the valve inlets on your radiator. Most standard radiators and valves match, but if you are replacing an unusual older radiator it is worth measuring first.
Getting the Finish Right
Valves are on show, so treat them as part of the design, not an afterthought. Chrome and polished nickel disappear against most radiators, black nickel and anthracite make a confident modern statement, and antique brass or copper suit period and traditional schemes. If you are choosing new designer radiators, pick the valve finish at the same time so the whole thing reads as one considered piece.
Frequently Asked Questions
Which radiator valve do I need if my pipes come out of the floor?
In almost every case, angled valves. They make the 90-degree turn from a vertical floor pipe into the bottom of the radiator, which is why they are the most common choice in UK homes.
What is the difference between corner and angled valves?
Both turn a right angle. Angled valves point the control head outward and are used for pipes from the floor. Corner valves tuck flush against the wall with the head facing forward, and are used for pipes coming out of the wall for a neater, more discreet finish.
Can I use straight valves with pipes from the floor?
Sometimes, if the radiator has bottom inlets that point straight down and the pipes line up directly beneath them. But for standard side-inlet radiators with floor pipes, angled valves are the correct and easier choice.
Do thermostatic and manual valves come in all three shapes?
Yes. Whether you choose a TRV or a manual valve, you can get it in angled, corner or straight, so match the shape to your pipes first, then pick the control type you prefer.
Still not sure? Check your pipes, note whether they rise from the floor or exit the wall, and let that decide the shape. Then browse all radiator valves to find the finish that finishes your radiator off perfectly.
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