Reef Central Online Community

Home Forum Here you can view your subscribed threads, work with private messages and edit your profile and preferences View New Posts View Today's Posts

Find other members Frequently Asked Questions Search Reefkeeping ...an online magazine for marine aquarists Support our sponsors and mention Reef Central

Go Back   Reef Central Online Community > General Interest Forums > Do It Yourself
Register Blogs FAQ Calendar Mark Forums Read

Notices

Reply
Thread Tools
Old 10/20/2007, 05:17 AM   #1
mic209
Registered Member
 
Join Date: Apr 2002
Location: Kingman, Arizona
Posts: 1,250
gluing THREADED PVC fittings?

i have a few threaded fittings that i know for sure i won't be taking apart. If i glue them together with PVC cement, will i get a good seal?


mic209 is offline   Reply With Quote
Old 10/20/2007, 05:34 AM   #2
Jeff
Registered Member
 
Jeff's Avatar
 
Join Date: Jul 2005
Location: Chicago
Posts: 11,943
You will get just as good a seal if you use a little teflon tape.


__________________
Always remember.... any time you reef, you also reef with every reefer that reefer has reefed with. Mitch 2/18/10


IWNFT343F

Current Tank Info: 70 gallon frag & mixed reef
Jeff is offline   Reply With Quote
Old 10/20/2007, 07:44 AM   #3
Roy G. Biv
Premium Member
 
Roy G. Biv's Avatar
 
Join Date: Jan 2007
Location: New Jersey
Posts: 3,650
I believe it is not recommended. I'm not sure you will get a better seal than tape. When you glue the threads, screw it on, the screwing action doesnt allow even coverage of the glue. Air bubbles form in the threads.


Roy G. Biv is offline   Reply With Quote
Old 10/20/2007, 07:59 AM   #4
thirty5
Moved On
 
Join Date: Jul 2007
Location: Bergen County, NJ
Posts: 62
I would not glue a threaded fitting. The cleaner and the glue actually melt the plastic it is not like using silicone which is added to the item. So adding the cleaner then the glue will actually melt away the threads and can hurt the seal. If it is threaded the use teflon tape, if no threads then glue.....


thirty5 is offline   Reply With Quote
Old 10/20/2007, 08:54 AM   #5
BeanAnimal
Registered Member
 
Join Date: Feb 2003
Location: Pittsburgh
Posts: 20,710
Use PTFE tape or paste. As mentioned, solvent cement will not fill the voids in the threads and may pose a problem down the road. The cement has very little filler in it.


BeanAnimal is offline   Reply With Quote
Old 10/20/2007, 12:18 PM   #6
mic209
Registered Member
 
Join Date: Apr 2002
Location: Kingman, Arizona
Posts: 1,250
so we're 3 for 1... Looks like i shouldn't do it. How much teflon tape do i use? And is Thread seal tape, the kind you get by the air tools in walmart the same as Teflon tape?


mic209 is offline   Reply With Quote
Old 10/20/2007, 01:32 PM   #7
thirty5
Moved On
 
Join Date: Jul 2007
Location: Bergen County, NJ
Posts: 62
Yes, most likely the same thing. It is usually on a little blue spool and it is white in color. Same thing that i use for regular plumbing in the house and also my air tools. There is also yello teflon tape, but that is for gas pipes. But it is actually the same material it is just thicker.

But if it is white and on a blue spool that is the ticket. I would go around the fitting about 2-3 times. Most PVC threaded connections will seal even without the teflon because teh threads are tapered. So the teflon just makes sure that the seal is nice and tight in teh threads...


thirty5 is offline   Reply With Quote
Old 10/20/2007, 01:51 PM   #8
NanoReefWanabe
A Pico Vase Guy
 
NanoReefWanabe's Avatar
 
Join Date: Oct 2006
Location: Barrie, Ontario, Canada
Posts: 6,121
LOL when i read this i thought...ohh man someone else made my mistake too...i was actually redoing some plumbing and had to cut the pipe directly above my return pump..i cut it glued on the union and then threaded the piece back onto my pump...i guess i was sloppy with the glue and it ran down the inside of the pipe and glued to my pump...what a real PITA...

anyway use the teflon tape...i use the orange stuff...but the white is perfectly fine...2-3 wraps MAXIMUM...and wrap the tape in such a way that when you thread the parts together you actually tighten on the tape instead of peeling it back onto itself..

hold piece in right hand, threads to the left....put the tape on the side of the pipe closest to your thumb and hanging down...wrap around the pipe under and over, [clockwise if you look at the threads from the end]...


NanoReefWanabe is offline   Reply With Quote
Old 10/21/2007, 09:19 AM   #9
WharfRat
Celebrating 9 sober years
 
WharfRat's Avatar
 
Join Date: Jun 2003
Location: orlando
Posts: 280
3 -4 full wraps around the threads in a clockwise direction will do just fine.


__________________
~A Little Research Goes a Long Way~

Current Tank Info: 90 mixed sps, softies, verts, fish..probably some other stuff
WharfRat is offline   Reply With Quote
Old 10/21/2007, 10:18 AM   #10
BeanAnimal
Registered Member
 
Join Date: Feb 2003
Location: Pittsburgh
Posts: 20,710
Start with 2-3 wraps... using too much tape does not help and puts a lot of stress on the female fitting.


BeanAnimal is offline   Reply With Quote
Old 10/21/2007, 04:52 PM   #11
flyyyguy
King of the white corals
 
flyyyguy's Avatar
 
Join Date: Jun 2006
Posts: 5,244
I very seldom use teflon tape for threaded PVC or for threaded pump connections. Silicone or pipe dope is much better.

I generally use silicone. Just a smallish bead around the top inside lip of the female part and thread in where comfortable and it will seal perfectly every time. Its removable, will never leak and especially for threading tapered fittings into bulkheads, or more importantly pump volutes, when using silicone you do not need to thread the fitting in all that far to make a perfect seal so your tapered fitting wont potentially stress and break the volute.


__________________
I like holding hands, snuggling, and long walks on the beach
flyyyguy is offline   Reply With Quote
Old 10/21/2007, 06:17 PM   #12
sixfins
Registered Member
 
sixfins's Avatar
 
Join Date: Aug 2007
Location: Plantation, Fl
Posts: 184
twice, clockwise with teflon will be plenty. Don't over tighten or you may crack your fittings, also more likely to happen with more wraps/layers of teflon.


sixfins is offline   Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -6. The time now is 10:32 AM.


TapaTalk Enabled

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Use of this web site is subject to the terms and conditions described in the user agreement.
Reef CentralTM Reef Central, LLC. Copyright 1999-2014