Sewage nightmare outdoor drain by kitchen

[Gardening Jim]

Hi would really appreciate some help. not sure if this is the right category

I have 1930s house mid terrace . The main pipe pipe runs out from the back to the back patio where it connects with the communal waste pipe (share between 3 houses).
(See diagram)
Its blocked and the sewage is overflowing .
One of my main problems is that there are no drain covers or manhole covers. The only access is 6inch square drain cover which is where the sewage is overflowing from

there is no inflow to this (apart from the rainwater gutter), just an outflow with a u-bend which appears to go off to main communal pipe. I hope the diagrams and photos explain. i have tried unblocking from here manually with auger and drain gloves but no luck. I cant insert drain rods as they wont go round the u-bend
Apart from that, there is no access.
If i knew exactly where the house drainage T-junctions onto the communal pipe, I would consider breaking through tthe concrete there and installing manhole (as I think this needs be sorted anyway)

Any help would be greatly appreciate, getting a bit desperate!!

 

[HERTS P&D]

WhenI get to jobs like these, I always drill a hole in the stack pipe approx 1.2 metres from the ground and then jet via the hole. This will clear the blockage and afterwards I would put a rubber furnco coupling over the hole.

Andy

 

[CBW]

WhenI get to jobs like these, I always drill a hole in the stack pipe approx 1.2 metres from the ground and then jet via the hole. This will clear the blockage and afterwards I would put a rubber furnco coupling over the hole.

Andy

Would you not use the rodding access point if there was one, like in the OP’s photo?

 

[CBW]

@Gardening Jim - is anyone else’s affected? Could be wise to call water board out if they are. Usually done for free.

 

[HERTS P&D]

Would you not use the rodding access point if there was one, like in the OP’s photo?

I didn't zoom in.

Yes, use the access point, there will be a sewage spill but cleaning up is not a problem.

Andy

 

[Gardening Jim]

Hi Guys, thanks for your replies
Sorry to be dense - so for access point do you mean the blanking cap that is on the left of the main black down sewage pipe ? (added diagram)

I dont have a jet (have a pressure washer though?) . Will drain rods go round those corners? Or I have the curly plumbers auger that spools out

Thanks for the Keep Calm icon!


EDIT: I just unscrewed that blanking cap, but there is no hole there, its just the side of the down pipe

 

[CBW]

Yes correct with the access cap. Can you post a photo? It might be a piece that pulls out.

 

[HERTS P&D]

It would need to be jetted.

Andy

 

[Gardening Jim]

here is the cap unscrewed - It looks like just the side of the pipe

 

[HERTS P&D]

That bit pulls off.

Andy

 

[Gardening Jim]

thanks Andy let me try
EDIT : yes brilliant

 

[Gardening Jim]

Will the jet hose be able to get around the angles?

 

[HERTS P&D]

YES!

Andy

 

[Gardening Jim]

OK feel I bit better . Have order Jet converter kit for Karcher K4 , if that doesnt work , it looks like theres no other way than to either hire the high powered professional kit, or hire the man who has one

 

[HERTS P&D]

You should call around tomorrow (monday) and get a FIXED price for jetting your drain line.

Andy