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Posted: Mon Jul 07, 2008 12:37 pm
by Johno12345
Hi,
I have been tasked with mapping the sewage systems at work and I have done OK so far, that was until I came to an old on that has 6 connections and a trap outlet. It is quite deep and is quite
large (I have not been into it) There are 2 dropshafts for foul, 2 proper connections and 2 6" pipes that just poke through the side wall, one at 90 degrees to the flow, also foul.
I am trying to label the drawing with useful indications of how the connection is made, So far, I have got dropshafts labelled OK but what would you recommend I call the poking out ones?
Pictures in my album of this lovely drain
http://picasaweb.google.co.uk/johncorme/Drains
Thanks
Posted: Mon Jul 07, 2008 7:38 pm
by seanandruby
Johno12345 wrote:Hi,
I have been tasked with mapping the sewage systems at work and I have done OK so far, that was until I came to an old on that has 6 connections and a trap outlet. It is quite deep and is quite
large (I have not been into it) There are 2 dropshafts for foul, 2 proper connections and 2 6" pipes that just poke through the side wall, one at 90 degrees to the flow, also foul.
I am trying to label the drawing with useful indications of how the connection is made, So far, I have got dropshafts labelled OK but what would you recommend I call the poking out ones?
Pictures in my album of this lovely drain
http://picasaweb.google.co.uk/johncorme/Drains
Thanks
Hope you dont go in unless there is a confined spaces set up as manholes are potentially dangerous, especially live ones. they are rodding points for the backdrops.
Posted: Mon Jul 07, 2008 9:44 pm
by Johno12345
no, im not going in. There is only one rodding point for the plastig backdrop. The ones I am on about are right near the bottom and they are live but arent bedded in at all.
This follows on from someone spending 3 days jetting the wrong drain!
Thanks
Posted: Tue Jul 08, 2008 5:53 am
by seanandruby
Looks like they have been added later if they arent benched in. 2 x 150 foul inlet pipes. could be an external backdrop are they over each other, or seperate its hard to tell the heights of them.
Posted: Tue Jul 08, 2008 4:10 pm
by Johno12345
the one on the right is higher than the one next to it they seem to all be seperate.
We have had them cleaned out today, one collapse, 4 disused but not capped off so full of soil and copious amounts of oil! Oh yes and another connection to the public sewer.
Posted: Thu Jul 10, 2008 10:31 am
by Tony McC
I think they are termed 'projecting over-benching inlets' or maybe it's "protruding over-benching inlets". It's a long time since I was last in a manhole!
Posted: Thu Jul 10, 2008 7:51 pm
by Johno12345
I like the sound of that 
I will go for the latter.
I cant blame you for not entering manholes, the chap who went down ours came up coated in black oil, I cant believe how strong the smell of diesel was!
Thanks
Posted: Thu Jul 10, 2008 8:39 pm
by Dave_L
Ha! There are far worse things down manholes to come up stinking of - diesel isn't one of them, that is a daily occurence for me!
Posted: Thu Jul 10, 2008 8:44 pm
by Johno12345
is it normal for there to be diesel smells in them? the ones we were doing were surface water, we are leaving the foul ones for a warm summers day
and I always thought that drains would be clean.