Glueing PVC pipes with gaps
#1
03-21-23, 03:45 PM
Glueing PVC pipes with gaps
Hello
having issue editing
have 3/4 pipe I need to glue a 1/2 pvc pipe to by sliding into the id.
is heavy duty oately cement enough?
or JB weld better
if does not work will have to dig hole underground the walkway
having issue editing
have 3/4 pipe I need to glue a 1/2 pvc pipe to by sliding into the id.
is heavy duty oately cement enough?
or JB weld better
if does not work will have to dig hole underground the walkway
#2
03-21-23, 04:14 PM
Member
Use a reducing bushing, like this one: https://www.homedepot.com/p/Charlott...00HD/203811445
Regular PVC solvent will work fine with it.
Regular PVC solvent will work fine with it.
#4
03-21-23, 04:58 PM
Pic
Thanks
but it must slide into id of 3/4 pipe
will find pic
not sure how to add pic. But 3/4 pipe is cut flush to concrete face. So no access to pipe od, only the id. Those fittings all require to be fit to od.
but it must slide into id of 3/4 pipe
will find pic
not sure how to add pic. But 3/4 pipe is cut flush to concrete face. So no access to pipe od, only the id. Those fittings all require to be fit to od.
Last edited by TimsBoynton; 03-21-23 at 05:14 PM. Reason: Add pic
#6
03-22-23, 01:15 AM
Thanks again
tried that.
its sr21 thiner pipe. Not Sch 40. So larger ID.
need good glue.
tried that.
its sr21 thiner pipe. Not Sch 40. So larger ID.
need good glue.
Last edited by TimsBoynton; 03-22-23 at 01:36 AM.
#7
03-22-23, 01:26 AM
Member
The material from both pieces needs to come into contact so the solvent (not really a glue) can melt the plastic so it joins. If there is a gap then there is a very good chance that the material will not flow into each other and a leak will happen.
#8
03-22-23, 03:52 AM
Hello thanks
yes I read that.
so probally JB weld?
the concrete guys broke it removing the wood forms.
Up late or maybe early
heavy duty oatly says small gaps but not how big
yes I read that.
so probally JB weld?
the concrete guys broke it removing the wood forms.
Up late or maybe early
heavy duty oatly says small gaps but not how big
#9
03-22-23, 05:12 AM
Group Moderator
Sounds like you just need to take a hammer drill and drill a series of holes around the outside of the pipe and then chip away enough concrete with a cold chisel to be able to use an adapter.
cwbuff
voted this post useful.
#10
03-22-23, 02:48 PM
Yes. But trying to avoid all the cutting and chipping. Could break the pipe while chipping
slicing with a skill saw concrete wheel may work.
glue takes 19 minutes
slicing with a skill saw concrete wheel may work.
glue takes 19 minutes
#12
03-23-23, 12:59 PM
Hello
sprinkler pipe. About 30 psi from a well pump.
thanks for your interest.
The gap between the pipes is about .035 radial or total of .07 on diameter.
i Have one shot to get good epoxy or chipping a lot of concrete
oately cement was no help they did not understand the question
opt1 PVC tape for the gaps with oately pvc cement.
opt2 Loctite or JB weld waterproof epoxy.
??
sprinkler pipe. About 30 psi from a well pump.
thanks for your interest.
The gap between the pipes is about .035 radial or total of .07 on diameter.
i Have one shot to get good epoxy or chipping a lot of concrete
oately cement was no help they did not understand the question
opt1 PVC tape for the gaps with oately pvc cement.
opt2 Loctite or JB weld waterproof epoxy.
??
Last edited by TimsBoynton; 03-23-23 at 03:20 PM.
#14
03-23-23, 05:28 PM
Member
i Have one shot to get good epoxy or chipping a lot of concrete
If it wasn't under pressure I'd say go for it, being under pressure that is not how PVC pipe joining is supposed to work. It might hold, maybe not. but your on the edge with this one and not what I would do but that is just me!
#15
03-24-23, 05:22 PM
Hello
i can lathe down the od of Sch 80 PVc. To fit in 3/4 SR 21 and still be thicker then the 21.
thats the answer
thanks
i can lathe down the od of Sch 80 PVc. To fit in 3/4 SR 21 and still be thicker then the 21.
thats the answer
thanks
#16
03-25-23, 09:53 AM
Join Date: Jan 2008
Location: Southeastern Pennsylvania
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I am no plumbing guru by a long way, but I don’t see why the adapter in post #3 won’t work. SDR 21 tells you about the wall thickness, but I think the nominal pipe size is still 3/4 and as such the O.D. is fixed (1.050 for 3/4 PVC pipe).
So that large end of the adapter in post #3 slides over the 3/4 pipe, and the 1/2 pipe slides into the other end of the adapter.
Or am I out in left field? or beyond that LOL!
OK - never mind. Just reread your posts. I guess you are saying that there is no room for an adapter. Somehow that does not sound like a good situation.
So that large end of the adapter in post #3 slides over the 3/4 pipe, and the 1/2 pipe slides into the other end of the adapter.
Or am I out in left field? or beyond that LOL!
OK - never mind. Just reread your posts. I guess you are saying that there is no room for an adapter. Somehow that does not sound like a good situation.
Last edited by zoesdad; 03-25-23 at 10:06 AM.
#17
03-25-23, 10:42 AM
Group Moderator
The pipe he needs to glue to is cut flush to the concrete and he won't drill around it for fear he chips the pipe. He could be careful chipping it but must not want to try.
#18
03-25-23, 04:26 PM
Just to summarize - it may work, or it may not. It may hold pressure for a minute, an hour, a week, or 20 years. There's no way to know for sure since it's a very non-standard connection.
The problem with pressurized connections is that even if they work up front, they can weaken over time. So regardless of whether you use PVC cement or a glue-type bond, there's no way to know if or when it'll fail.
So give it a try, at least it's outside - so worst case, it wastes some water. I'd feel much more against it if it was inside.
The problem with pressurized connections is that even if they work up front, they can weaken over time. So regardless of whether you use PVC cement or a glue-type bond, there's no way to know if or when it'll fail.
So give it a try, at least it's outside - so worst case, it wastes some water. I'd feel much more against it if it was inside.
#19
03-26-23, 03:14 PM
Thanks for all your interest.
the lathed OD to the 3/4 ID should work
i hope.
Never trust the concrete guys removing wood from the concrete
the lathed OD to the 3/4 ID should work
i hope.
Never trust the concrete guys removing wood from the concrete
