1. What is the Difference between Angled and Straight Valves?

Whether you'll need Angled or Straight radiator valves is determined by where your central heating pipework is located, in relation to the tappings (valve entries) on the radiator or heated towel rail (note: electric towel rails and electric radiators don't need valves). As you can see below an Angled valve has a return in it, so the threaded side will enter the tapping and the knut side will connect to the pipework on the other side. On a straight valve the radiator and pipework will be either end of the same line.

2. Determining Which Valves You Need for Your Chosen Radiator?

Here are some images which show you the different valve entry points (tappings) you'll find across all of the designer radiators we sell and which type of valves you should use for each. We also give you this information on the product page itself under the "Technical Specification" section, so you'll easily be able to tell which type of valve that product requires. We refer to the valves coming in from either "below" or "behind" (which typically means coming from the wall (behind) or the floor (below)..but in some cases the pipes can come from the wall and have a return in them.. so technically they now come from below (see the very last image below for an explanation of this).

Finally.. here is some advice about how to overcome the problem of ordering the wrong valves with for your chosen radiator..!!

3. Calculating and Understanding Pipe Centres.

Pipe Centres is a term which refers to the distance required between the two central heating pipes that will enter the designer radiator or heated towel rail. We have created this image below to help you visualise how the pipe centres are caluculated.

Note: If you would like to know the width of the different types of angled valves we sell, to allow you to calculate the pipe centres for either "Outer Side Tappings" and "Inner Side Tappings", we have listed the measurements needed below (however please in mind these values are given based on the valves being fully inserted into the tapping (which on some models they don't screw absolutely flush therefore the pipe centres will increase or decrease accordingly).... with this we highly recommend that you wait until both the radiator and the valves arrive with you before installing your pipes - we will not accept responsibilty (or the costs of floor tiles needing to come up etc) for pipes which are wrong based on the fact they have been installed prior to the radiators arriving, as these measurements are given as a guide only):

Your Guide to Calculating “Plus Valve Widths” Pipe Centres
Links to Valve Product Pages	Valve Description	Pipe Centers
	(Geyser) Flat Front (non thermostatic) Angled Valves:	40mm each side
	(Geyser) Flat Front (thermostatic) Angled Valves:	40mm each side
	(Geyser) Sphere Angled Valves:	38mm each side
	(Geyser) Square Angled Valves:	40mm each side
	(Geyser) Traditional Angled Valves:	37mm each side
	(Geyser) Thermostatic Angled Valves:	40mm each side

4. What are the 'Floor to Centre of Inlet' and 'Wall to Centre of Inlet' measurements?

These two measurements are explained in the diagram below. If you have these measurements they will allow you to install your pipework, ahead of the radiator physically arriving with you.. although we strongly recommend that you wait until the product arrives before putting any pipework in, as there can always be variances due to products being made by hand. Also your walls and floor might be out slightly. If you wait until the product arrives, you can install the pipes using the product itself as a guide, which is the best option.

5. What are the differences between Thermostatic and Normal Valves?

Thermostatic Valves (also known as TRVs) allow you to control the temperature of a single designer radiator or heated towel rail within your central heating system. The normal themostat on your entire system controls all radiators, therefore not giving such precision control. Thermostatic valves are made up of a larger valve (TRV) and a lockshield (as shown in the images bellow), so will look imbalanced compared with normal valves. Geyser sell thermostatic valves in white and chrome and they are available in straight and angled.