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 Post subject: What Coupler
PostPosted: Sat Mar 03, 2018 12:49 pm 
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As you may have read in my previous post, I cut my condensate pipe to get out of trouble. Now we are thawing I am looking to repair the pipe but I am not sure what fitting. The pipe is 3/4" plastic but I cannot see any straight couplers that size. The boiler buoy I mentioned is naturally out of stock at the minute so I will revisit that in the warmer weather. Ideally a pushfit coupler would be good as Mrs D will have to do the job due to my present incapacity. Can some kind soul point me in the right direction.

Thank you

DWD

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 Post subject: Re: What Coupler
PostPosted: Sat Mar 03, 2018 1:40 pm 
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Plumb Center part no F41618

This is a compression fitting.

Other than that a standard overflow solvent weld coupling

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 Post subject: Re: What Coupler
PostPosted: Sat Mar 03, 2018 3:43 pm 
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Thanks Dave :thumbright: It got me thinking if I use a metal compression fitting as a joint then perhaps I could use this tee https://www.toolstation.com/shop/p71693 ... r=3%2F4%22 with a bit of copper and an elbow to provide an emergency drain off in the future. I was not sure if the acidity in the condensate would cause issues with metal??

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DWD

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 Post subject: Re: What Coupler
PostPosted: Sat Mar 03, 2018 4:07 pm 
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I don't really know for sure, but I do know that even dilute sulphuric eventually eats most "normal" metals apart from stainless. Seen it happen in industry.
There's a list here.
http://www.roymech.co.uk/Useful_Tables/ ... als_1.html
Looks like even bronze will be corroded.
I'd use plastic if possible.



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 Post subject: Re: What Coupler
PostPosted: Sat Mar 03, 2018 4:16 pm 
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It will over time.

Don't use anything metallic.

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 Post subject: Re: What Coupler
PostPosted: Sat Mar 03, 2018 4:24 pm 
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Looks like the solvent weld then :thumbright:

DWD

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 Post subject: Re: What Coupler
PostPosted: Tue Mar 06, 2018 10:23 am 
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The Vaillant engineer called today and he was a top bloke and repaired the condensate pipe for me (using the fitting Dave suggested which I had got). He kindly replaced the igniter head, as it was a bit corroded, and checked it all over for me. All over until the next sub zero cold spell.

Thanks to all who helped with advice

DWD

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