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Advice wanted please - blocked and immovable section of cast iron drain pipe



Weststander

Well-known member
NSC Patreon
Aug 25, 2011
63,411
Withdean area
Hi.
Any ideas on a reasonably priced and effective way of having a drain pipe unblocked:

It's the lower 3 feet that feed the ground drains (no other adjacent way of access, as it is then in a drain under a concrete path before joining the sewers). This section is made of cast iron and cannot be removed. It's full of several feet of silt/sand from sand-faced roof tiles and is completely blocked, preventing rain water passing through.

Discovered this by removing the plastic drainpipe section above, to discover that the cast iron section was blocked all the way down by probing with a lamp-pin.

Grateful for any good advice.
Thanks.
 


Chinster

Member
Aug 7, 2011
96
Can you not cut the pipe where it goes into the ground? leave about 6 inches and couple it back up to plastic with a rubber coupler.
 


Mr Bridger

Sound of the suburbs
Feb 25, 2013
4,408
Earth
Hi.
Any ideas on a reasonably priced and effective way of having a drain pipe unblocked:

It's the lower 3 feet that feed the ground drains (no other adjacent way of access, as it is then in a drain under a concrete path before joining the sewers). This section is made of cast iron and cannot be removed. It's full of several feet of silt/sand from sand-faced roof tiles and is completely blocked, preventing rain water passing through.

Discovered this by removing the plastic drainpipe section above, to discover that the cast iron section was blocked all the way down by probing with a lamp-pin.

Grateful for any good advice.
Thanks.

Where it goes into the ground are there any bushes shrubs etc nearby? Sometimes either the drains have cracked and roots have grown into the soil pipe or something has germinated in the bottom of the down pipe and the roots have grown.
Can you find the nearest manhole and rod back up?

If not then renew the section of cast iron with plastic and hopefully the roots will come out without the need to dig up the path/ concrete.
 


Garage_Doors

Originally the Swankers
Jun 28, 2008
11,789
Brighton
Hi.
Any ideas on a reasonably priced and effective way of having a drain pipe unblocked:

It's the lower 3 feet that feed the ground drains (no other adjacent way of access, as it is then in a drain under a concrete path before joining the sewers). This section is made of cast iron and cannot be removed. It's full of several feet of silt/sand from sand-faced roof tiles and is completely blocked, preventing rain water passing through.

Discovered this by removing the plastic drainpipe section above, to discover that the cast iron section was blocked all the way down by probing with a lamp-pin.

Grateful for any good advice.
Thanks.


Is it just a rain water pipe or are any of the house utilities fed into it?

If its just rainwater it may not go to the sewers but to a dug soak away and therefore not so easy to unblock.
The fact you have silt etc in there does point to this rather than a connection to the sewers.
 


Springal

Well-known member
Feb 12, 2005
23,714
GOSBTS
I had similar once, and used First Clear Flow in Worthing. They gave it a good RODDING, and cleared it out
 




blue2

New member
Apr 21, 2010
1,229
We had the same out of which came moss tons of moss water leaves dead bird and it's nest, cut a section of pipe with a disc grinder about 10 inches get a drain cleaning company to site to power flush up and down the pipe will cost around £80:00 then go to a plumbers merchants I think plumbing trade supplies stock them and buy a rubber jointing piece for a down pipe for around £20.00 hopefully job done
 


Jim Van Winkle

Well-known member
Jul 14, 2010
3,125
Hawaii
Can you not cut the pipe where it goes into the ground? leave about 6 inches and couple it back up to plastic with a rubber coupler.

Had the same problem on my in-laws house last year. Although the pipe was cracked not blocked. Just removed the cracked part, put in two rubber couplers and a piece of plastic pipe. Jobs a good'en.
 


BN9 BHA

DOCKERS
NSC Patreon
Jul 14, 2013
21,455
Newhaven
Is it just a rain water pipe or are any of the house utilities fed into it?

If its just rainwater it may not go to the sewers but to a dug soak away and therefore not so easy to unblock.
The fact you have silt etc in there does point to this rather than a connection to the sewers.

This is sometimes the case with rainwater pipes, lots of older propertys have a soak away.
With Most modern propertys the rainwater pipe terminates into a 110mm drain pipe, which then goes into a manhole.
If you have a soak away I would start digging!! Or get a builder/ ground worker in.
 




Jan 30, 2008
31,981
Hi.
Any ideas on a reasonably priced and effective way of having a drain pipe unblocked:

It's the lower 3 feet that feed the ground drains (no other adjacent way of access, as it is then in a drain under a concrete path before joining the sewers). This section is made of cast iron and cannot be removed. It's full of several feet of silt/sand from sand-faced roof tiles and is completely blocked, preventing rain water passing through.

Discovered this by removing the plastic drainpipe section above, to discover that the cast iron section was blocked all the way down by probing with a lamp-pin.

Grateful for any good advice.
Thanks.
BLOCKBUSTER DRAINAGE, get the pipe to the soak away jetted cost about £65 had the same problem on a shared down pipe :wink:
regards
DR
 


Weststander

Well-known member
NSC Patreon
Aug 25, 2011
63,411
Withdean area
Is it just a rain water pipe or are any of the house utilities fed into it?

If its just rainwater it may not go to the sewers but to a dug soak away and therefore not so easy to unblock.
The fact you have silt etc in there does point to this rather than a connection to the sewers.

Thanks for all the advice, nsc posters.

It is just rainwater, and it does lead to the drains/sewers (and not a soakaway) which are just 20 downhill feet away.
 





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