kitchen mixer tap check valve

[Mgrant]

Should kitchen sink mixer tap have a check valve on it if its mains cold and tank fed hot water?

 

[Mgrant]

Is it just the cold side if there needed? Can imagine the tank feed hot would struggle to flow though a check valve

 

[Mgrant]

Do most mixer taps mix outside the tap.body so dont need a check valve?

 

[buckley plumb]

Most come out of the spout in separate nozzles

 

[Mgrant]

So no che k valve required?

 

[buckley plumb]

So no che k valve required?

Check instructions

 

[Mgrant]

Instructions dont say anything but its a single spouted tap so the water mixes in the tap body

 

[plumben]

As per MI'S

 

[ShaunCorbs]

If your unsure and is tank hot and mains cold put one on the hot just incase

 

[Mgrant]

Thanks would a check valve on the hot reduce the hot pressure/flow even more. Is already quite poor.

 

[ShaunCorbs]

Thanks would a check valve on the hot reduce the hot pressure/flow even more. Is already quite poor.

Yes slightly it's either that or find a new separate tap

 

[Mgrant]

And fitting without is a no go? The one that's in at moment mixes in the body I think and has no check valves on the pipework

 

[buckley plumb]

Fit it without and see where water Comes out of spout if different place then it's OK if not then add check valve. I don't think the plumbing police will arrest you

 

[Mgrant]

Thanks what do you mean by see were water comes out of the spout?

 

[Mgrant]

Thanks, what do you mean by see were water comes out the spout if different place then its ok?

 

[Mgrant]

Trying to upload an image of tap

 

[Mgrant]

View attachment 23458

 

[Mgrant]

Cooke & Lewis Reno Chrome Effect Monobloc Tap | Departments | DIY at B&Q

 

[buckley plumb]

Thanks, what do you mean by see were water comes out the spout if different place then its ok?

Yes if it does it is not mixing in tap. Another way is fit tails to tap and take a mouth of water and blow it down each tail to see. Flow will be poor on hot as tap needs 0.3 bar 3 meter head of water and I bet hole in flexis is small.

 

[chris watkins]

"I have seen more and more jobs now asking for an NVQ level 3. Although I am happy were I am working I can see the level 3 benefiting me for life. Were as just going on a gas course gets my a qualification that will last 5 years."

One of the main benefits of the Level 3 is (as you rightly said in your previous posts) that it includes the Water Regs course which had you acquired this in your previous 8 years as a plumber you would of be able to answer your own question.

Does that sound a tad harsh ? well sorry but I do think it strange how some can work as a Plumber without having a working knowledge of the Law surrounding what they do for a living.

 

[Dsp]

Would be looking very carefully at the MI's to see if the tap is even WRAS approved

 

[Mgrant]

Yes if it does it is not mixing in tap. Another way is fit tails to tap and take a mouth of water and blow it down each tail to see. Flow will be poor on hot as tap needs 0.3 bar 3 meter head of water and I bet hole in flexis is small.

Thanks pretty sure it mixes in the tap body as the spout is just a single circular tube.

 

[Mgrant]

If this is the case is a check valve really needed on both the hot and cold supply's?

 

[Mgrant]

Any advice please? I have always worked on new builds so been balanced supplies of a combi or unvented hot water with balanced cold.

 

[chris watkins]

Any advice please? I have always worked on new builds so been balanced supplies of a combi or unvented hot water with balanced cold.

So what protection is required (installed) on those un-vented systems then, where there is a chance of hot water (cat 2) & cold water (cat1) mixings ?

It is the same for your mixer taps as there could be cross contamination between the two.