At wits end with cast iron rad

[Riley]

Hi chaps

i hope someone can impart a bit of advice to me.

Spent all all morning trying to fit a cast iron rad. All corners nicely sealed except one which has a very very slow drip. Have tried compounds, ptfes, lsx etc has anyone else got any ideas as it's driving me nuts.

Thanks as ever

matt

 

[IDCHAPPY]

Locktite threadtape?

 

[Gray0689]

Ptfe maybe

 

[CXR100]

hemp and boss white!! worked for me before!

 

[CXR100]

or even gas ptfe! thats a bit thicker, cany you get it in white, as yellow would look awfull!

 

[Irish]

2nd for hemp and boss white !

 

[CXR100]

remember fitting a towel rail before and one of the tails were leaking, just plain box standard towel rail with standard angled valves, nothing fancy, but not cheap quality, i tried everything , was told to try hemp and boss white and suprisingly it worked!

 

[IDCHAPPY]

I remember when al i used was hemp and boss white on screwed steel pipework on site... them were the days 🙂

 

[Irish]

I remember when al i used was hemp and boss white on screwed steel pipework on site... them were the days 🙂

Yeah get home stinking of linseed oil and every clown asking you have you been doing some glazing today

 

[Gray0689]

I remember when al i used was hemp and boss white on screwed steel pipework on site... them were the days 🙂

Still use it don't you

 

[Chalked]

Another hemp and paste here.first paste for me then a thin strand of hemp wound on the same direction as you would ptfe, starting from the end of the thread..

 

[Best]

Boss white for rad tails is the best & will often seal after hot water heats it.
If you have very few threads - ptfe is not great. I agree that hemp (flax, as I call it) makes a garanteed seal, but I hate that it seizes rock solid.

 

[Ermintrude]

Locktight. 55 and a smudge of jet blue for luck

 

[Best]

Locktight. 55 and a smudge of jet blue for luck

I normally would say Jet Lube or Jet Blue, but i bet ordinary Boss White paste is king for sealing heating threaded joints. It oozes oil out of it when very hot & seals a still leaking joint later, I have seen.

 

[Riley]

Thank you all of you. Really appreciate it. Got a couple more ideas there to try. Merry Xmas all

 

[Centralheatking]

That is a really good idea CHK

or even gas ptfe! thats a bit thicker, cany you get it in white, as yellow would look awfull!

 

[Centralheatking]

Some older plumbers have sprinkled 'polyfilla' into boss white when it is brand new and
all oily - others just leave the top off for a week or so - BUT BOSS GREEN with 'ptfe' IS the most unsuitable jointing paste I have ever used - IT IS RUBBISH it sticks to nothing centralheatking

I normally would say Jet Lube or Jet Blue, but i bet ordinary Boss White paste is king for sealing heating threaded joints. It oozes oil out of it when very hot & seals a still leaking joint later, I have seen.

 

[Killy Bing]

Crapload of the thick loctite cord, and half a tub of jet lube......

 

[Ermintrude]

Crapload of the thick loctite cord, and half a tub of jet lube......

The old sainsburys carrier bags are also good. My parents Rayburn is still watertight after 15 years. No ptfe and bottom tapping kept leaking on a Sunday night when renewing system with the old man... In went the carrier bag handles round 28mm male iron

 

[Centralheatking]

Flax is a product from N ireland and it is a great sealong product chk

Boss white for rad tails is the best & will often seal after hot water heats it.
If you have very few threads - ptfe is not great. I agree that hemp (flax, as I call it) makes a garanteed seal, but I hate that it seizes rock solid.

 

[Gray0689]

Always flax and paste over here lol

 

[IDCHAPPY]

Boss white for rad tails is the best & will often seal after hot water heats it.
If you have very few threads - ptfe is not great. I agree that hemp (flax, as I call it) makes a garanteed seal, but I hate that it seizes rock solid.

+1 for boss white on rad tails 🙂

 

[IDCHAPPY]

Some older plumbers have sprinkled 'polyfilla' into boss white when it is brand new and
all oily - others just leave the top off for a week or so - BUT BOSS GREEN with 'ptfe' IS the most unsuitable jointing paste I have ever used - IT IS RUBBISH it sticks to nothing centralheatking

Boss Green is gash, *used* it once and never again :lol:

 

[stevetheplumber]

Flax is a product from N ireland and it is a great sealong product chk

agreed it just rolls of everything

 

[mfgs]

Hemp and boss white as a last resort, although gas ptfe (3-4 wraps) and a bit of lsx normally works for me when a threaded joint is being a bit of a nightmare.