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View the thread, titled "Re Condensing boiler" which is posted in UK Plumbers Forums on UK Plumbers Forums.

Hi
Just wondering if anyone can help? I moved into a new build several years back and have noticed that every time I empty dishwater into my sink the boiler (in my kitchen) makes a gurgling noise. The sink waste and the boiler overflow both run into the soil pipe! Is this anything to get concerned about? All answers appreciated
Many thanks
Anthony
 
Ideally need an aav on the boiler pipe as the gurgling you hear is a vacuum sucking the water out of the boiler trap

Or the boiler condense piping in different
 
Is your dishwasher hose connected into the waste pipe after the sink trap?
As per Shaun, or alternatively an AAV waste might do it:
IMG_0736.jpeg
 
OK. Sorry my mistake. I read your "dishwater" as "dishwasher" - just me not paying attention!
Your washing machine is plumbed in correctly.
So the woosh of water when you empty the sink, or pour something down it, is sucking air through the boiler condensate trap.
If you were to replace the trap in you photo with the equivalent AAV version, that might stop the gurgling.
IMG_0737.jpeg
 

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Re Condensing boiler
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