The next step - replacing a blending valve

[alanscottt]

I have a replacement blending valve for my central heating system. What is the next step(s) to do to fit.
thanks in advance

 

[tamz]

Turn off water and drain pipes. 3 nuts .Slacken them. Remove old and fit replacement (new washers too) tighten and turn water back on.
That's about it.

 

[alanscottt]

How do I go about draining my type of system? Where do I start, do I shut off the mains supply of water that comes into the house? Do I empty the tank? thanks in advance

 

[mickyg]

turn off main stopcock open kitchen taps and away you go.

 

[alanscottt]

thanks, the pipes that connect to the existing blending valve seem to be be full of water ie some are hot and some are cold?

 

[mickyg]

have u done what i said?

 

[alanscottt]

yea, turned water off at source, drained taps so no water to upstairs or down stairs.

 

[alanscottt]

Can you have a look at the valve I have to replace the existing one and tell me if it will do the job....cheers

 

[alanscottt]

the one in my pics....thanks

 

[45yearsagasman]

The blending valve in your pic is still available,so why get a different one?
Take it back and get the same model.Your one may fit but why not get the same one?

 

[alanscottt]

where can I source the existing valve, do you have a link for online store
thanks

 

[45yearsagasman]

From your pic it looks like the blending valve used on the old Gledhill Boilermate 2 and 3. They have a brand name Brawa.Over £100 to buy!
Who made your cylinder? They should know the part number.After that I can't help.If the valve you have is not a direct fit then I suppose it could be adapted to fit but make sure its fitted the correct way round paying attention to the flow direction arrows on the body.