Sch 80 to Sch 40 adapter - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 01-10-2008, 12:47 AM Thread Starter
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Sch 80 to Sch 40 adapter

Do I need such an adapter? I plan to use Sch 80 bulkheads only, and the rest of the plumbing Sch 40 parts. Do I need to buy any special adapter?

Thanks.


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post #2 of 12 (permalink) Old 01-10-2008, 12:59 AM
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Nope. There is no such adapter. The OD of the pipes are the same but the wall thickness is different.



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post #3 of 12 (permalink) Old 01-10-2008, 05:53 PM Thread Starter
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Thanks good to know... my next tank is going to be my first plumbing project.


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post #4 of 12 (permalink) Old 01-10-2008, 11:16 PM
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You do need to buy transition cement though, you can't just use sched 40 cement.

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post #5 of 12 (permalink) Old 01-10-2008, 11:38 PM
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Quote:
You do need to buy transition cement though, you can't just use sched 40 cement.
Never heard that before. I always buy the Oatey brand primer and cement from HD or Lowes. The medium-bodied cement says on the box that it is good for both sch 40 and sch 80 up to 6" in diameter.

I choose to use threaded sch 80 bulkheads on my tank so that I didn't have to glue to them. Bulkheads are expensive (especially the Haywards I have) and I didn't want to permanently glue anythng to them. Will make it easy to take the system apart if I ever need to.



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post #6 of 12 (permalink) Old 01-11-2008, 01:14 AM
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I'm in Canada so maybe there's some regulation on it here vs there, but there's a sched 40 cement and a transition cement, here they've different colours on the label, blue and green if I remember right.
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post #7 of 12 (permalink) Old 01-13-2008, 04:23 PM
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I can't speak for Canada, but in the US the glue is the same for sch 40 & 80, but which glue you use is determined by what diameter PVC you're gluing.

"Regular" is only for sch 40, up to 6".
"Medium body" is for sch 40 to 8", sch 80 to 6".
"Heavy Body" is for sch 40 + sch 80 to 15".

I know for aquarium use it's not as critical due to the low pressures involved, but if you use sch 40 & sch 80 in the same circuit, the pressure rating of the circuit is that of the sch 40.

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post #8 of 12 (permalink) Old 01-16-2008, 03:06 PM
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I was doing assembly last night and the transition cement is a very thick white cement and smells horribly, the Sched 40 looks roughly the colour of contact cement not like the purple stuff I've seen in the past.
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post #9 of 12 (permalink) Old 01-16-2008, 03:11 PM
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Quote:
Originally Posted by original kuhli View Post
I was doing assembly last night and the transition cement is a very thick white cement and smells horribly, the Sched 40 looks roughly the colour of contact cement not like the purple stuff I've seen in the past.
AFAIK, the purple stuff is just primer used to "condition"the PVC before using the actual Cement

Walter

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post #10 of 12 (permalink) Old 01-16-2008, 06:26 PM
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Yea, the purple stuff is primer, not glue. And tommy's post is dead on. there is no transition glue, only certain glues for the size pipe..


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post #11 of 12 (permalink) Old 01-16-2008, 06:55 PM
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No, there is transition glue in Canada and apparently not in the US.
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post #12 of 12 (permalink) Old 01-16-2008, 07:35 PM
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Originally Posted by original kuhli View Post
No, there is transition glue in Canada and apparently not in the US.
Learn something new everyday! interesting.


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