weeping cast iron pipe
 

There is an (100 yer old) internal cast iron soil pipe from upstairs
runs vertically through our utility room. It has been painted over the
years with a few coats of emulsion. We're redecorating so I stripped
off the old paint and cleaned it up.

When cleaning it up, I noticed a few small (10mm max) blisters on the
old paintwork with pockets of damp/rust behind them. Regardless, I gave
it a couple of coats of metal primer with intending to paint it with
the same emulsion as the walls when I get that done (this weekend).

However, after a week, there are tiny bead of rust/water has come
through the undercoat. There's not enough to form a drip, just a small
brown patch coming through the paint. It's not a big problem, and I
certainly don't think it worth replacing the pipe - more of a cosmetic
issue really.

Can anyone suggest a teatment that would keep it blemish free. What I
don't want to do is put the emulsion on and have the brown spots come
through that too.

Thanks.

weeping cast iron pipe
 

Probably the Bitumen Coating from the Soil Pipe bleeding through. Use a
good sealing primer and it will be OK.

weeping cast iron pipe
 

On 4 Mar 2006 03:26:20 -0800, "urchaidh" wrote:

Can anyone suggest a teatment that would keep it blemish free.

No. It's already paper-thin and is ready to collapse completely. Plan
to replace it ASAP, at a time of your chooosing. The alternative is to
have it fail when it decides to. Your call....