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severe blockage in waste pipe


 
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antbfc

from United Kingdom

Joined: 21 Sep 2009
Posts: 4
Location: United Kingdom

PostPosted: Mon Sep 21, 2009 7:36 pm Reply with quote

Hi,

I have a severe blockage in the 32mm waste pipe coming from my basin which goes into a tee which takes the bath waste.

The trap was found to be full of muck and hard as stone. I tried clearing the pipe run with a hand plunger and also tried a hydraulic plunger which cleared the bath waste but not the basin.

For over a week I poured caustic soda and boiling water with no results. I also tried a "worm" but it just bent the spiral on the end.

The pipework when removed was full of this limescale stuff nearly the full diameter of the pipe. The straight run was rodded out and is 100% clear but where it drops in 2 45's there is still a blockage.

I removed the bath waste to try and rod it but I did not have anything flexible or strong enough and the worm just bends when it comes into contact with it.
The blockage seems worse because the last bit has compressed in the fitting.

There is adequate fall from the pipe at all appropriate points. I am going to try one shot drain cleaner as i have read good reviews.

Can anyone reccomend anything stronger if this doesnt work or a suitable tool for getting round that tight 45 degree angle. It is completly blocked solid now.

Any help is greatly appreciated
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bathstyle

from United Kingdom

Joined: 22 Aug 2009
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PostPosted: Mon Sep 21, 2009 7:42 pm Reply with quote

One shot instant drain cleaner is about as strong as you want to go.

Very strong stuff, will eat straight into your T shirt if spilt on there, then your skin
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dextrous

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PostPosted: Mon Sep 21, 2009 8:31 pm Reply with quote

Since you describe the blockage as possibly limescale, clearing it with the alkalis you have described is not likely to dissolve it. Try some brick acid.

If all else fails then replacing the pipework may be the best option - you've spent so much on chemicals now that it would probably have been cheaper to do this anyway. But it depends on how much access you have.
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cmother1

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PostPosted: Mon Sep 21, 2009 8:52 pm Reply with quote

Sounds like you've made heroic efforts to clear this blockage. I can't believe it's just limescale in a waste pipe. A hot water pipe maybe, but..
The only thing I've seen as bad as what you describe is tile cement/grout washed down the drains, but not washed down well enough. Nigh impossible to get rid of - had to replace the pipework. Give the brick acid a try and cross your fingers.
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dextrous

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PostPosted: Mon Sep 21, 2009 8:55 pm Reply with quote

Agree that it is unlikely to be limescale really in retrospect, and more than likely to be residue of adhesive/grout poured down there at some time. Either way, alkali isn't shifting it.
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Nige F

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PostPosted: Tue Sep 22, 2009 11:48 am Reply with quote

Thank goodness for that- I thought you only get limescale like that in urinals icon_mad.gif
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antbfc

from United Kingdom

Joined: 21 Sep 2009
Posts: 4
Location: United Kingdom

PostPosted: Tue Sep 22, 2009 3:14 pm Reply with quote

thanks for some very helpful posts. Yeah the access to it is a real issue i will have to take out the bath, shower screen etc :-s what is this limecale issue in urinals? where would i be able to buy this brick acid stuff. b and q?
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antbfc

from United Kingdom

Joined: 21 Sep 2009
Posts: 4
Location: United Kingdom

PostPosted: Tue Sep 22, 2009 3:15 pm Reply with quote

http://www.reagent.co.uk/brick-acid.html is this the stuff? should i try high strength? thanks again
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bathstyle

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PostPosted: Tue Sep 22, 2009 3:21 pm Reply with quote

I'm keen why one shot is not recommended here, it is sulfuric acid.

Is brick acid stronger than sulfuric acid?
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clf-gas

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PostPosted: Tue Sep 22, 2009 3:32 pm Reply with quote

bathstyle wrote:
I'm keen why one shot is not recommended here, it is sulfuric acid.

Is brick acid stronger than sulfuric acid?


But you did do icon_eek.gif
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dextrous

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PostPosted: Tue Sep 22, 2009 3:50 pm Reply with quote

bathstyle wrote:
I'm keen why one shot is not recommended here, it is sulfuric acid.

Is brick acid stronger than sulfuric acid?
In my ignorance I was unaware that it was acidic
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antbfc

from United Kingdom

Joined: 21 Sep 2009
Posts: 4
Location: United Kingdom

PostPosted: Wed Sep 23, 2009 3:31 pm Reply with quote

one shot doesnt seem to be clearing the blockage. this brick acid where will i be able to find it?
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Nige F

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PostPosted: Wed Sep 23, 2009 7:03 pm Reply with quote

Builders Merchant icon_wink.gif
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