How to fit an appliance valve (Ed.)

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Plumber fitted water connections for washing machine (top connection) and dishwasher (bottom connection).... dishwasher showing water inlet error, which makes me think the valve (on the bottom) is in the wrong position. Is this because the direction of water flow is actually horizontal on this connection? Cheers in advance!!
 

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Yes, normally, that's what I understood! But water came out when in the horizontal position....is it because the water flows up to the top connection but the bottom connection comes off to the side (so flows horizontal)? Thanks for your response though!
 
What dipstick put the tap so it was touching the wall? :unsure:
Loosen the top compression fitting and the hose and turn the tap around so you can actually use it then nip the connections up..

For determining which way round the taps need to be just slacken the hoses so they drip a little then turn the taps horizontal or vertical and use the drips to determine "on"/"off". Once you've determined which way is off and on, take a sharpie and write it on the wall behind
 
Ok brilliant thanks everyone, so my picture shows the bottom connection as OFF. Plumber left it that way, so wondered why the dishwasher wasn't working...will turn it horizontal. Cheers
 
Last Q whilst you helpful lot are still here if that's ok....these are how the wastes from WM and DW are positioned. I would have thought these should be pointing downward to avoid waste drawing back into machines, or does it not matter? Any thoughts? Cheers again.
 

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Definitely wasn't a plumber that did that with the top appliance tap against the wall and those drain outlets like that.

The drain hoses should be brought up and over and down into the waste pipe and yes the spigots should be upwards, that and the connection needs to be trapped - unless there's a trap further downstream on that pipe.

Over time if it isn't trapped that will let waste/drain smells back up into the appliances and probably into the cupboard where that connection lives. as that twin connector has an air inlet

Is this a new kitchen?
 
Huge thanks for your response, yes a new kitchen. He was trying to accomodate IKEA kitchen sink and fittings, and added on some macalpine fittings to make it all work. Here are some photos of full set up. Is the grey fitting the trap in that case?
 

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Yes, the grey fitting is the trap. If your dishwasher and washer have non return valves in the pump end of the pipe (many do) then they will be more resistant to developing sewer smells, but I do think there are some improvements to be made here. What's the small white pipe? Some sort of condensate drain for an appliance?
 
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