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Posted: Wed Apr 03, 2013 5:30 pm
by jimbo1000
I intend to install a new soil pipe for an en suite bathroom and need to know 1. if it is necessary to fit a rodding eye adjacent to the rest bend ? 2.Do I need to fit an inspection chamber where the new drain connects to the existing clay pipe ? Any advice would be appreciated
Posted: Wed Apr 03, 2013 5:55 pm
by msh paving
No need for rodding eye,as long a manhole is fitted in the main line,if its a clay pipe you will need 2 ac4000 clay to plastic adaptors to fit the chamber, MSH 
Posted: Wed Apr 03, 2013 6:09 pm
by lutonlagerlout
if its a downstairs bathroom you can get a bend with a rodding eye built in assuming the pipe work is external
if it is a new stack pipe for upstairs its always prudent to have a rodding eye about 300mm from the floor
what about ventilation?
is the run vented already?
if you go straight to an inspection chamber no need for an Ic
but if the pipe changes direction really you should have one,even if its only a little 300mm jobby
cheers LLL
Posted: Wed Apr 03, 2013 7:37 pm
by jimbo1000
Thanks for your replies. Its for a first floor bathroom. There is no manhole on the existing system . Do the regs require an IC where the new drain branches into the existing?
Posted: Wed Apr 03, 2013 8:55 pm
by lutonlagerlout
a building control officer would require this to meet building regs
LLL
Posted: Wed Apr 03, 2013 8:57 pm
by Mikey_C
jimbo1000 wrote:Thanks for your replies. Its for a first floor bathroom. There is no manhole on the existing system . Do the regs require an IC where the new drain branches into the existing?
yes.
is this a house you intend on staying in? having put an ic in at the bottom of my stack and then at later date replaced the stack its self with all bends in the stack being access bends. I now know the pipes will never block again. If I had done this or hadn't put the bends in I can guarantee it would have already blocked, this is due to sod's law!
Posted: Thu Apr 04, 2013 8:07 pm
by jimbo1000
Have just discovered the existing drain is at least 15 foot below ground level.What is the max. angle a new drain can connect to the existing?
Posted: Thu Apr 04, 2013 8:54 pm
by msh paving
If it is 15 ft deep, its not a DIY job, you will need a 3ton mini excavator and trench sheets to hold the sides up,at that depth it would need to be put onto a back drop
drop shaft info
you will need concrete manhole rings to build a manhole with
Is the no way you can connect to somewhere else,as this will be costly MSH
Posted: Thu Apr 04, 2013 9:44 pm
by jimbo1000
The drain is 9ft deep at the rear of the house as it has a cellar.The new drain needs to branch into the existing at the front of the house.
Posted: Thu Apr 04, 2013 10:15 pm
by local patios and driveway
also if toilet is 1.5m above the bottom of manhole you need to vent the toilets downpipe
Posted: Fri Apr 05, 2013 12:03 am
by lutonlagerlout
otherwise you get a vacum effect and the discharge sucks all the water out of the traps
I have a rental with a 2.7m invert
I just cored a hole and let the discharge tumble on its own
its worked for 15 years but I dont think the BCO would like it
LLL
Posted: Fri Apr 05, 2013 12:18 am
by mickg
>>>>If it is 15 ft deep, its not a DIY job, you will need a 3ton mini excavator
I think you will find you will need a machine a lot bigger than a 3 ton machine to dig 15 feet down unless you dig off an area first and sit the machine a lot lower than the ground level, like 6 ft lower down
I was 9 feet down a few weeks ago digging a garage foundation and was on the max for a 3 ton machine, had to hand dig the corners square
Posted: Fri Apr 05, 2013 7:26 am
by GB_Groundworks
Yeah micks right I can dig about 2.2-2.3m depending on my bucket with my kx71-3
I'm doing a 3.2 metre back inlet next week, 7.5 ton machine, 8 x 5 metre sheet piles 4 whalers and 4 trench rams.
The engineer was telling me if you have an existing ring you can break through and bring it down the inside of the manhole in pipe the put a 90 on it and discharge into the flow.
Have to have a look in my sewers for adoption book for details
Lll you naughty boy 
I bet than man hole was a mess if you ever had to get in it.
7m is the deepest connection we've done onto a 600mm pipe had to have a 22 ton machine and trench boxes not cheap
Posted: Fri Apr 05, 2013 7:13 pm
by lutonlagerlout
believe it or not giles the existing connections were the same and it all runs clear
we are talking 1890 terraced house with 1 IC at the end of the alley
IME 3 tonne takeuchi Digs 2.7 max
the detail you mention giles is called a tumble,think you have to have rodding access on the top 90 deg bend
LLL
Posted: Sat Apr 06, 2013 9:06 am
by seanandruby
internal back drop.