Installing New Rads - Supply Pipes Slightly Different Positions In Concrete Floor

[Ermintrude]

U tube . Watch a few vids

 

[happyflyer]

Do we need to draw it... Street ... M&F obtuse, what the hell, might be slighty over 15 mm each end

 

[galaxy_plumbing]

i would go for 1200 width if its more efficient or do you need 1300?

 

[Fallingdown]

You could try pulling 2x30 degree bends then cutting to fit and joining in the middle with a socket.

 

[plumbandplumber]

I would try about 30 degrees first,45 may be a bit tight

Tried a 20mm offset with a 45 degree angle. Trouble was, after putting the mark on pipe and going for the second bend - lining the mark I made up with edge of former wasn't possible because the first bend fouled the bender's pipe keep/latch/retainer.

When I did it with 30 degree bend - no problem. So, looks like a 30 degree bend is best for a very small offset.

Thanks to all for your advice.

 

[happyflyer]

Please take a photo when you finished the job, none of us here are too old to learn

 

[wetdrip]

One thing that was mentioned was digging up some of the concrete (screed?) to change the pipes properly. I was assuming that the pipes would be difficult to get to and may be coated in whatever they are set into. But I suppose they may be covered in something for protection. What am I likely to find if I start chiselling up the floor around the pipes? Will the pipes be in a good enough condition/state to allow soldering onto them? Presumably the top layer is screed, how easy is this to excavate - easier than normal concrete?

Provided you know which direction the run is coming from:
Using the OD "exposed part" of the buried pipe measure out an equidistant circle and drill around in a circle where each hole made doesn't run into the previous hole drilled i.e. leave about 1/16" of wall between each hole drilled. Perform this in several stages, going down , say 2" depth at a time.
Once you've completed your first full circumference drill down. Take a very small chisel and tap the walls left between each drill down.All will crack and come away.Clear out your first drill down then continue until you're at a depth you feel confident working within for piping.

 

[happyflyer]

Hell this is going on like the film "The Great Escape" ., its a 10min job, please don't start digging the floor up or you will end up back at the boiler.

 

[happyflyer]

Flexi anyone? Ballofix and a 900mm flexi?

Draw it for us Ermi

 

[Howsie]

Get the long street as it will make life much easier for you.

 

[ederz]

If you use a street elbow I would street straight out of the valve, tucked underneath the rad, back to the pipe keeping pipework tidy and 'unseen'

 

[Ermintrude]

Think stellios the plumber is awesome! Bit of speed fit instead of offset.

 

[happyflyer]

Think stellios the plumber is awesome! Bit of speed fit instead of offset.

Fifth Amendment, no comment, not in my house, photographer ain't awsome :crazy: