Maximum pressure of waste pipe
timeg...@my-deja.com
can hold when jointed by solvent weld glue? I can't see anything on
the web sites.
TIA
Grunff
If you're asking about rated max pressure, then there isn't one - they
aren't designed for pressure operation, and should only be used in open
systems.
If you're asking how much pressure can they really take, then I've used
42mm pipe as a reservoir at 5 bar without any problems. That was for air.
--
Grunff
nightjar
<timeg...@my-deja.com> wrote in message
news:1142084612.0...@z34g2000cwc.googlegroups.com...
> Does anyone know the maximum pressure 42mm or 50mm plastic waste pipe
> can hold when jointed by solvent weld glue? I can't see anything on
> the web sites.
You won't, as they are only designed for use at atmospheric pressure.
Anything higher is entirely at your own risk.
Colin Bignell
Doctor Drivel
"nightjar .uk.com>" <nightjar@<insert my surname here> wrote in message
news:47idnadoffb...@giganews.com...
They are designed to take a maximum pressure as drain pipes under heavy use
in a building with 3 or 4 floors can have a quite a bit of pressure on them.
A building that is 50 foot high with block drain all up the stack has quite
a pressure at the bottom of the stack.
There are solvent weld plastic pipes on surface water systems, usually on
farms and in industry. I don't know much about this stuff so can't help. I
recall reading that solvent weld can take 1 to 2 bar, but the makers are the
people to contact, as there is about three types of PVC pipe. I am
surprised this info is not on their sites.
nightjar
"Doctor Drivel" <Min...@nospam.com> wrote in message
news:4413057e$0$76915$892e...@authen.yellow.readfreenews.net...
>
> "nightjar .uk.com>" <nightjar@<insert my surname here> wrote in message
> news:47idnadoffb...@giganews.com...
>>
>> <timeg...@my-deja.com> wrote in message
>> news:1142084612.0...@z34g2000cwc.googlegroups.com...
>>> Does anyone know the maximum pressure 42mm or 50mm plastic waste pipe
>>> can hold when jointed by solvent weld glue? I can't see anything on
>>> the web sites.
>>
>> You won't, as they are only designed for use at atmospheric pressure. >
>> Anything higher is entirely at your own risk.
>
> They are designed to take a maximum pressure as drain pipes under heavy
> use in a building with 3 or 4 floors can have a quite a bit of pressure on
> them. A building that is 50 foot high with block drain all up the stack
> has quite a pressure at the bottom of the stack.
You shouldn't be using 42mm or 50mm pipe to drain a 4 storey block of flats.
They should be feeding into a vented stack of at least 100mm diameter and a
blockage at the foot will only have the back pressure generated by the
height necessary to overflow the lowest outlet on the ground floor.
Colin Bignell
Doctor Drivel
Not if the toilet is way high and the only one. It could be a loft extension
and an en-suite. I was on about the solvent weld, not particularly the pipe
size. The pipe itself will take quite a pressure before it pops. 5 bar was
given here, and no problems in weld and pipe.
nightjar
The pipe size is relevant, as different British and International Standards
apply to different sizes, materials and applications of waste pipes. My
initial comments applied only to small bore pipe as usually sold for use as
waste pipes.
> The pipe itself will take quite a pressure before it pops. 5 bar was
> given here, and no problems in weld and pipe.
That is fairly meaningless unless we know the pipe size, material, grade and
application and whether those are in any way related to the pipe being used
by the OP. That pressure is, for example, more than ten times what should be
applied to 100mm - 400mm underground pipelines during a water test.
Colin Bignell
Doctor Drivel
~30 foot is 1 bar. 1 bar is well ....1 bar, irrespective of pipe size.
<snip misinformation>
nightjar
...
>>> The pipe itself will take quite a pressure before it pops. 5 bar was
>>> given here, and no problems in weld and pipe.
>>
>> That is fairly meaningless unless we know the pipe size,
>
> ~30 foot is 1 bar. 1 bar is well ....1 bar, irrespective of pipe size.
As I said, that is fairly meaningless information without knowing the pipe
size, material, grade and application. Some pipes are designed to accept
that sort of pressure, while others will be overstressed by it.
Colin Bignell
Pieter
--
For full context, visit https://www.homeownershub.com/uk-diy/maximum-pressure-of-waste-pipe-339544-.htm
Colin Bignell
> I have 160mm soil pipe and I'm looking to use them for my micro hydro
> turbine with a 20m head. Any thoughts?
>
--
Colin Bignell
The Natural Philosopher
If solvent welded they can certainly handle the sort of 28psi that the
base of te pipe will be subject to.
If in any doubt get a section and fill it with water, seal it and
presurise it to that level - you can hire pressure gauges and pumps, and
using water is safe if it splits
--
“A leader is best When people barely know he exists. Of a good leader,
who talks little,When his work is done, his aim fulfilled,They will say,
“We did this ourselves.”
― Lao Tzu, Tao Te Ching
Colin Bignell
> On 20/07/2023 08:47, Colin Bignell wrote:
>> On 19/07/2023 22:15, Pieter wrote:
>>> I have 160mm soil pipe and I'm looking to use them for my micro hydro
>>> turbine with a 20m head. Any thoughts?
>>>
>>
>> Soil pipes are vented to atmosphere, so do not have a pressure rating.
>>
>
> True, but that doesn't mean they can't take any pressure.
It is just that nobody publishes pressure ratings for them.
> If solvent welded they can certainly handle the sort of 28psi that the
> base of te pipe will be subject to.
> If in any doubt get a section and fill it with water, seal it and
> presurise it to that level
- you can hire pressure gauges and pumps, and
> using water is safe if it splits
--
Colin Bignell