15mm valves are the only size you’re likely to encounter, since 15mm copper pipes are the most common. There are also other sizes, from 8mm to 28mm, and there are accompanying adapters.
What size are radiator valve tails?
1/2" BSP x 15mm
Radiator Valve Tail 1/2″ BSP x 15mm
This radiator valve tail connects a radiator to a standard radiator valve. The male thread is 1/2 inch BSP (normal size for the connections on a radiator). The tail has a compression nut and olive to suit a valve with a 15mm compression type outlet.
What size are radiator nuts?
You need 1/2 inch BSP cap nuts ( blank nuts) for the TRV and lockshield that are pictured in your link. And 15 mm compression stop ends for the radiator tails.
Are radiator tails universal?
The connection between your valve and the radiator is standard across all moderns radiators and valves. The size differences listed above refers to the width of your pipes that the valves will slot onto.
What size is a radiator spanner?
Answer: The tool is made from 1/2″ hex (12.5mm). The long end has a couple of keyways cut into it. The short end has a 3/8″ (10mm) square with recess so that it can fit over the breather screw to remove / tighten the upper plugs on certain radiators.
What size radiator valves do I need?
10mm radiator valves are usually needed when you have a single radiator which was added to your existing heating system. It’s not common for an entire house to have 10mm pipes but having a radiator in the likes of a conservatory can sometimes see these pipes (and valves) needed.
What size are radiator bleed valves?
Castrads bleed valves can be used with a wide range of cast iron radiators. Most steel multicolumn radiators use half-inch 21mm BSP bleed valves.
What is a blanking nut?
Blanking Nut used to seal old Isolating Valve. “You can take off the radiator, screw the cap on that has a rubber inlay to create a good seal and it won’t leak while you paint the room.
What is a radiator blanking plug?
First things first; a blanking plug (or the very similar bleed plug) is a small, elegant looking plug either circular or hexagonal that you usually find at the top of a radiator, on its side, so at a 90°-angle to a wall.
What is a radiator valve tail?
Radiator valve tails are the devices that screw into the two bottom radiator tappings. They are connectors between the radiator and the valves that control the flow of water through the radiator. You might need to change a tail to fit a new type of valve.
What size are old radiator valves?
15mm valves are the only size you’re likely to encounter, since 15mm copper pipes are the most common. There are also other sizes, from 8mm to 28mm, and there are accompanying adapters.
Are all radiator valves 15mm?
Do all radiators need a 15mm valve? Yes. The BSP standard in the UK for radiators is to have a 15mm entry at either end. No matter what size, shape or style of radiator you’re buying, the valve will always be the same size.
Can you mix and match radiator valves?
Don’t mix and match Need to add or change a radiator? Stick to the same type of metal. Introducing more than one type of metal radiator into your heating system can increase the risk of corrosion.
Are all radiator bleed keys the same size?
Are radiator keys all the same size? Radiator keys for modern radiators will generally be a standardised size, so you needn’t worry about buying a radiator key that won’t fit.A clock key between size eight to 12 should work on your older radiator if you wish to bleed it.
What size allen key do I need for radiator valves?
1/2 inch
Use this 1/2 inch size allen key hex spanner to install or remove the tails of union type radiator valves that are screwed into a radiator.
Do you bleed a radiator when it is on or off?
Turn off your heating. You can’t bleed a radiator when the heating is on, as it may be too hot to touch. You could also get hot water spraying out of the radiator. Use your radiator key to turn the valve at the top of the radiator.
What size valves do I need?
In most cases, adding 15mm to the height of the rim is a reasonable rule of thumb when it comes to deciding on a valve length. That extra 15mm is important because it provides enough length to fit any pump head.
What are the 2 knobs on a radiator?
One valve accounts for the amount of hot water that enters the radiator. The other valve, referred to as the lockshield valve, balances the system by regulating how much heat the radiator gives off.
Why do radiators have 2 valves?
Radiator valves are necessary in whatever form as they allow an easy way to stop the flow of the central heating circuit into the radiator.The reason you need two valves generally on all rads is because the system dictates a flow and return. The flow pipework carries the newly heated water from the boiler.
Which radiator should I bleed first?
If your home has 2 floors you should begin bleeding the downstairs radiators first. It’s also advisable to start with the radiator which is furthest away from the boiler. Once you’ve bled all the downstairs radiators you move on to the upstairs, again beginning with the radiator which is furthest from the boiler.
What key do I need to bleed a radiator?
A specialist radiator bleed key is recommended for bleeding radiators. You can usually find bleed keys at your local DIY or hardware store. If you are unable to source a bleed key or have misplaced the one you own, a flat-blade screwdriver can usually be used as a substitute.
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