Do i need check valves for mixer tap ?

[bluenose27]

Evenin

Is the following an adequate arrangement for connecting cold water supply to mixer tap on basin -

cold water inlet (copper pipe) connected to check valve, connected to small length of copper pipe (say 4inch), then flexi tails (with built in isolater ) to tap ?

Thanks

Lee

 

[bluenose27]

Or with separate isolator as follows:
....mains inlet connected to check valve connected to 4" long copper pipe connected to isolator, connected to copper pipe with compression screw fitting on end for flexi tails ?

Seems a lot of joints to me though!

Can you get isolation check valves, which would eradicate a couple of joints ?

Thank again

Lee

 

[Armo74]

No need for check valve if the hot and cold don't mix.

 

[bluenose27]

how do i know if the water mixes or not in the tap ?

Thanks

 

[Armo74]

Look in the spout it could either have 2 semi circles or a smaller spout inside the outer one. Also follow the manufactures instructions they will tell you whether you do or not.

 

[John506]

If you turn both hot and cold on slowly and feel very close to the spout you can actually feel the seperate hot and cold water coming out left and right of it and then mixing as it falls through the air.

If it mixes in the tap body or spout it will all be the same temperature on both sides.

 

[bluenose27]

it has a plastic insert inside the spout. I cannot see up the spout. Should i pull the insert out ?

 

[John506]

it has a plastic insert inside the spout. I cannot see up the spout. Should i pull the insert out ?

You may break the tap?

Probably less hassle to just fit a check valve on the cold if you are unsure

 

[bluenose27]

Thanks John

Just looking back at my original 2 posts, are both of these a good config. for plumbing these taps. What about my concerns for multilpe joints, are there too many or is this just what is needed ?

Thanks again

Lee

 

[John506]

I would personally use

Isolator -> check valve -> flexi

If you use a flexi with a built in isolator, it will be harder to isolate if you need to replace or maintain the check valve.

You can have as many compression nuts as you need or want, as long as none of them leak

 

[bluenose27]

I would personally use

Isolator -> check valve -> flexi

If you use a flexi with a built in isolator, it will be harder to isolate if you need to replace or maintain the check valve.

You can have as many compression nuts as you need or want, as long as none of them leak

Thanks for your help John, much appreciated mate

 

[John506]

No problemo, happy to help