Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss

Foulwater drains: tightest bend a drain rod can negotiate?

1,191 views
Skip to first unread message

Phil K

unread,
Apr 21, 2015, 6:37:08 AM4/21/15
to
Re: 5" foulwater drains:
Can anyone tell me what is the tightest radius of bend that today's drain-
unblocking rods can get around? Thanks...

PhilK

JimK

unread,
Apr 21, 2015, 7:02:39 AM4/21/15
to
What choice do you have?

I would expect standard available waste components & common sense to guide me....

Jim K

Phil K

unread,
Apr 21, 2015, 9:04:29 AM4/21/15
to
JimK <jk98...@gmail.com> wrote in
news:1d58c6be-d9d6-44e2...@googlegroups.com:
I should have mentioned that I need to achieve a 90-degree change of
direction that is as sharp as drain-cleaning rods can cope with.

PhilK

Phil K

unread,
Apr 21, 2015, 9:12:37 AM4/21/15
to
Phil K <p...@xxdd44.com> wrote in news:XnsA4838FB1...@130.133.4.11:
PS... (I'm assuming that a standard 90-degree bend is too sharp to get
past, but I may be wrong.)

PhilK

JimK

unread,
Apr 21, 2015, 9:34:17 AM4/21/15
to
Stick a mini manhole in?

Jim K

Capitol

unread,
Apr 21, 2015, 11:36:43 AM4/21/15
to
Phil K wrote:
> Phil K<p...@xxdd44.com> wrote in news:XnsA4838FB1...@130.133.4.11:
>
>> JimK<jk98...@gmail.com> wrote in
>> news:1d58c6be-d9d6-44e2...@googlegroups.com:
>>
>>> What choice do you have?
>>>
>>> I would expect standard available waste components& common sense to
>>> guide me....
>>>
>>> Jim K
>>
>>
>>
>> I should have mentioned that I need to achieve a 90-degree change of
>> direction that is as sharp as drain-cleaning rods can cope with.
>>
>> PhilK
>>
>
> PS... (I'm assuming that a standard 90-degree bend is too sharp to get
> past, but I may be wrong.)
>
> PhilK

Why not use 2 x 45 bends?

harryagain

unread,
Apr 21, 2015, 11:46:31 AM4/21/15
to

"Phil K" <p...@xxdd44.com> wrote in message
news:XnsA48376B5...@130.133.4.11...
With any luck you don't need to go round the bend.
Put the flat rubber disk on and work it back and forth as hard as you can
with long strokes
The hydraulic effect in the water usually clears the blockage.

Don't try to force it round the bend, it may get stuck.
And then you'll be in the shit.
Literally.


Phil K

unread,
Apr 21, 2015, 12:08:47 PM4/21/15
to
"harryagain" <harry...@btinternet.com> wrote in
news:mh5rap$khc$4...@dont-email.me:

> With any luck you don't need to go round the bend.
> Put the flat rubber disk on and work it back and forth as hard as you
> can with long strokes
> The hydraulic effect in the water usually clears the blockage.
>
> Don't try to force it round the bend, it may get stuck.
> And then you'll be in the shit.
> Literally.

Yes, thanks for the tip. Hopefully the need to unblock it will never occur.
I am just trying to plan the route of the drain so that if it ever did get
blocked, there is no possibility that I'll have to dig the drain up to
unblock it.

PhilK

Phil K

unread,
Apr 21, 2015, 12:10:12 PM4/21/15
to
JimK <jk98...@gmail.com> wrote in news:4a73e8e2-9012-4e61-8f62-
cfaa4f...@googlegroups.com:

>
> Stick a mini manhole in?
>
> Jim K


Yes, that may be an option - thanks. I still neet to know how tight of a
bend todays drain rods can get round though.

PhilK

Phil K

unread,
Apr 21, 2015, 12:15:03 PM4/21/15
to
Capitol <sp...@wher.eva.co.uk> wrote in news:kNKdnZcLoZkV86vInZ2dnUVZ7q-
dn...@brightview.co.uk:

> Why not use 2 x 45 bends?

That would certainly be better than a single 90 bend - particularly since I
have a vague idea that I may have read somewhere that bends of no more than
45 degrees are recommended.

Will a set of drain rods will get around two successive 45 bends placed
together? If so, it will save me from looking for more expensive solutions.

PhilK

Phil L

unread,
Apr 21, 2015, 12:32:15 PM4/21/15
to

"Phil K" <p...@xxdd44.com> wrote in message
news:XnsA48376B5...@130.133.4.11...
> Re: 5" foulwater drains:
> Can anyone tell me what is the tightest radius of bend that today's drain-
> unblocking rods can get around? Thanks...

Rearrange the trench so that it uses a 45, then 6 inches of pipe, then
another 45, IE create a slower bend


Jonno

unread,
Apr 21, 2015, 12:34:36 PM4/21/15
to
Phil K scribbled
You might get away with using a rest bend or better still a T with a
rodding eye.

JimK

unread,
Apr 21, 2015, 12:55:24 PM4/21/15
to
/Yes, that may be an option - thanks. I still neet to know how tight of a
bend todays drain rods can get round though.

PhilK /q


Why? The idea is you won't need to bend rods much at all if you can get in at a strategically placed manhole.... you can work 'both ways' away from it....

Jim K

harryagain

unread,
Apr 21, 2015, 1:29:09 PM4/21/15
to

"Jonno" <m...@privacy.nob> wrote in message
news:MPG.2fa08c708...@nntpswitch.blueworldhosting.com...
Yes.
But it should really have an inspection chamber.


Chris French

unread,
Apr 21, 2015, 2:40:51 PM4/21/15
to
In message <XnsA483AEF0...@130.133.4.11>, Phil K <p...@xxdd44.com>
writes
I have attachment that goes on the pressure washer that works well at
cleaning drains, and is much easier to get up drains than rods.

Basically a long hose with a small head on the end that jets out a few
high pressure jets of water sidewards (or rather a bit backwards as
well) . Works well
--
Chris French

Mr Fuxit

unread,
Apr 21, 2015, 2:41:33 PM4/21/15
to
On Tuesday, 21 April 2015 11:37:08 UTC+1, Phil K wrote:
> Re: 5" foulwater drains:

>That would certainly be better than a single 90 bend - particularly since I
>have a vague idea that I may have read somewhere that bends of no more than
>45 degrees are recommended...........

>Will a set of drain rods will get around two successive 45 bends placed
>together? If so, it will save me from looking for more expensive solutions.

Well, you'll get them round the bends, but you wont get them back again! They will
jam across the bends, and pulling will jam them tighter.

Fredxxx

unread,
Apr 21, 2015, 3:00:05 PM4/21/15
to
I thought any serious change in direction required some form of
additional access?

mick

unread,
Apr 21, 2015, 3:36:14 PM4/21/15
to
If you want to be safe then stick to straight runs joined by rodding
points. No rods go round any bends without the risk of not being able to
retrieve them, especially on the longer runs.

Jonno

unread,
Apr 21, 2015, 4:41:52 PM4/21/15
to
harryagain scribbled
Doesn't have to be anything fancy though.

Andrew Gabriel

unread,
Apr 21, 2015, 6:30:33 PM4/21/15
to
In article <amKsXKTM...@familyfrench.co.uk>,
Chris French <new...@familyfrench.co.uk> writes:
> I have attachment that goes on the pressure washer that works well at
> cleaning drains, and is much easier to get up drains than rods.
>
> Basically a long hose with a small head on the end that jets out a few
> high pressure jets of water sidewards (or rather a bit backwards as
> well) . Works well

I picked one up from Lidl a few months ago on the basis that it looked
like it might be too useful to pass by. A couple of weeks later, needed
it to clean the kitchen sink waste pipe, which over 20 years or so had
reduced diameter with thick gunk. Did a fantastic job.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

Chris French

unread,
Apr 21, 2015, 6:50:59 PM4/21/15
to
In message <mh6j0b$sfg$1...@dont-email.me>, Andrew Gabriel
<use...@cucumber.me.uk> writes
>In article <amKsXKTM...@familyfrench.co.uk>,
> Chris French <new...@familyfrench.co.uk> writes:
>> I have attachment that goes on the pressure washer that works well at
>> cleaning drains, and is much easier to get up drains than rods.
>>
>> Basically a long hose with a small head on the end that jets out a few
>> high pressure jets of water sidewards (or rather a bit backwards as
>> well) . Works well
>
>I picked one up from Lidl a few months ago on the basis that it looked
>like it might be too useful to pass by. A couple of weeks later, needed
>it to clean the kitchen sink waste pipe, which over 20 years or so had
>reduced diameter with thick gunk. Did a fantastic job.
>
I bought mine to clear a blockage in the underground drain serving the
kitchen. Which turned out to be blocked with many years of solidified
fat (I couldn't get the old drain rods I had up the pipe anyway due to
the depth and size of the manhole)

Worked a treat on it and I've used it on a couple of other jobs since
--
Chris French

John Rumm

unread,
Apr 21, 2015, 8:53:15 PM4/21/15
to
They will go round a 90 degree swept bend, but not usually an elbow.


--
Cheers,

John.

/=================================================================\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\=================================================================/

John Rumm

unread,
Apr 21, 2015, 8:54:56 PM4/21/15
to
If in doubt stick a Y and a rodding eye into any run that you can't be
sure of being able to get to from the end.

stuart noble

unread,
Apr 22, 2015, 5:32:26 AM4/22/15
to
I've always managed with a garden hose but the pressure washer sounds
like a big improvement over rods

JimK

unread,
Apr 22, 2015, 6:47:30 AM4/22/15
to
/I picked one up from Lidl a few months ago on the basis that it looked
like it might be too useful to pass by. A couple of weeks later, needed
it to clean the kitchen sink waste pipe, which over 20 years or so had
reduced diameter with thick gunk. Did a fantastic job./q

Interesting. What make pressure washer do you have or lOW, which makes will it fit?

Cheers
Jim K

Chris French

unread,
Apr 22, 2015, 8:40:26 AM4/22/15
to
In message <HUJZw.291996$9j2....@fx04.am4>, stuart noble
<stuart...@ntlworld.com> writes
It is.

A hose is ok for relatively easily dislodged stuff, but it would have
made no impact on my 'fatberg'
--
Chris French

Andrew Gabriel

unread,
Apr 22, 2015, 9:25:07 AM4/22/15
to
In article <b9338ad8-150e-4d74...@googlegroups.com>,
It's an old Lavorwash Deltajet. Bought from Woolworths 15 years ago.

The coupler on the Lidl drain cleaner is a bayonet fitting, which is
the same as a coupler halfway up the lance where you take the jet
off and attach a brush instead. I guess it's probably some type of
pressure washer standard - was pleasantly surprised when it just
plugged in with no faffing around.

Dave Liquorice

unread,
Apr 22, 2015, 11:13:07 AM4/22/15
to
On Wed, 22 Apr 2015 01:53:12 +0100, John Rumm wrote:

> They will go round a 90 degree swept bend, but not usually an elbow.

I was thinking that last night but a quick google didn't reveal
anything that I'd consider a "swept bend" ie something with a radius
> 18". All I could find were bends with not much more than 8" radius.

Even with a proper swept bend I'd be dubious about shoving rods past
it. Better to have straight runs between inspection chambers IMHO.

--
Cheers
Dave.



AL_n

unread,
Apr 22, 2015, 12:15:01 PM4/22/15
to
Chris French <new...@familyfrench.co.uk> wrote in
news:k6gjwkgk...@familyfrench.co.uk:

>>I've always managed with a garden hose but the pressure washer sounds
>>like a big improvement over rods
>
> It is.
>
> A hose is ok for relatively easily dislodged stuff, but it would have
> made no impact on my 'fatberg'
> --

...or a securely-lodged incontinence pad...

Phil K

unread,
Apr 22, 2015, 1:27:24 PM4/22/15
to
John Rumm <see.my.s...@nowhere.null> wrote in
news:7PKdnT6gobhqbavI...@brightview.co.uk:

>>
>> Yes, that may be an option - thanks. I still neet to know how tight of a
>> bend todays drain rods can get round though.
>
> They will go round a 90 degree swept bend, but not usually an elbow.

I seem to have two options regarding a gentler 90-degree bend:

1) http://tinyurl.com/nnw8ghn

and even more gradual 90 bend:

2) http://tinyurl.com/jwy7zo9

I could use either of the above. The first one, above (the tighter of the
two) would make life simpler, as the whole drain is going to be close to
the surface, covered with a line of slabs. It would be difficult cover the
gentler of the two bends with slabs.

The other option would be to use a mini-manhole somewhere after the bend...
but it would have to be a tiny manhole. (A 500mm dia one would be too
obtrusive for this particular job. Has anyone seen a really tiny manhole
available anywhere?

Many thanks..

PhilK

Phil K

unread,
Apr 22, 2015, 1:56:41 PM4/22/15
to
Phil K <p...@xxdd44.com> wrote in
news:XnsA484BC42...@130.133.4.11:
PS...

I found this 250mm manhole & cover:

http://tinyurl.com/l8o23lv

That's still quite expensive and also an eyesore on the surface. Would it
be allowable to simply have one of the following junction fittings in the
pipe run, with the branch pointing upward with a plug in it?

http://www.screwfix.com/p/equal-junction-87-5-triple/12152

Admittedly it would only allow rodding on one direction, but that's all I
need, as the other stretch can be rodded from an existing manhole.

Or would a building inspecter throw a fit?

Thanks..

PhilK

Dave Liquorice

unread,
Apr 22, 2015, 2:13:05 PM4/22/15
to
On 22 Apr 2015 17:27:20 GMT, Phil K wrote:

> 2) http://tinyurl.com/jwy7zo9

That's what I would call a proper swept bend.

> Has anyone seen a really tiny manhole available anywhere?

Rodding access? With a T and 45 bend. T used to turn the corner flow
into the branch and outlet from spigot end, socket takes spigot of
the 45 degree bend and rodding point spigot into socket of 45 degree
bend.

--
Cheers
Dave.



Phil K

unread,
Apr 22, 2015, 2:21:24 PM4/22/15
to


PPS.
This looks ideal:

http://tinyurl.com/lzjp5e8
(if indeed, I need a rodding point after using a large-radius bend such as:
http://tinyurl.com/nnw8ghn
or
http://tinyurl.com/jwy7zo9

PhilK


Phil K

unread,
Apr 22, 2015, 4:41:43 PM4/22/15
to
"Dave Liquorice" <allsortsn...@howhill.com> wrote in
news:nyyfbegfubjuvyypb...@srv1.howhill.co.uk:

>> 2) http://tinyurl.com/jwy7zo9
>
> That's what I would call a proper swept bend.
>
>> Has anyone seen a really tiny manhole available anywhere?
>
> Rodding access? With a T and 45 bend. T used to turn the corner flow
> into the branch and outlet from spigot end, socket takes spigot of
> the 45 degree bend and rodding point spigot into socket of 45 degree
> bend.


That's clever! Thanks for this solution.

I'd like to make a wide-radius 45-degree bend (for another part of this
same drainage job). Can I saw a portion off a 90-degree swept bend? Will
the sawn end fit into a standard socket? (I'm not sure if it would work, as
the sawn end would not be dead straight and possibly not dead circular. I
have a vague idea I did this once, many years ago, but I may be wrong.

Cheers,
PhilK
0 new messages