Busy manhole

[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

[seanandruby]

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.

[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

[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.

[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.

[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!

[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

[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!

[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.