Central heating Burst Pipe underfloor

[Will007]

Hi Guys

Can someone please advise me,I have had an underfloor CH leak and have removed the cement screed to reveal the defective pipe which I have cut out.The pipe I removed is 10mm microbore with a plastic sheath,I have purchased a similar product and am not sure whether I should just re cover this newly repaired section or add a further amount of lagging to the pipe to protect it.

The screed is at most approx 2 inches deep which does not leave much room to get the new pipe in place and apply the sand cement covering.

I have been deliberating this for a while now as I don't want to get it all back together only to have to dig it out again in six months time because I did not do the job right the first time.

Please Help.

 

[oilman]

Replace all the pipe with a new one above ground. This is a heating system and needs maintaining so don't bury it again or you'll be digging again. When you feel enthusiastic, replace all the other underground pipes too.

 

[Will007]

Thank you for your response,unfortunately I am looking for something a little less drastic a best compromise. Are you suggesting that if I burry the new PVC coated pipe it will definitely fail again I thought the PVC coating was supposed to protect the pipe.
To remove all my underfloor pipes would be a very big commitment and all I want to do is get our heating back on.

So can you advise on how best to burry the pipe.

Cheers

Will

 

[ChrisR]

The plastic covered pipe shouldn't get corroded so don't know what happened there. But the jont will be vulnerable. Wrap it in Denso tape - nasty sticky stuff. Then put some hairy type lagging round it - purpose is only to allow it to move about a bit without pulling itself apart. Never let cement touch copper, or allow dampness in the materials to connect them.

 

[Will007]

Thanx Chris

Will follow your advice,
Also whilst searching for the burst section of pipe the plumber removed another section in a different part of the house, that as now been cemented over but the repaired pipe was only wrapped in the hairy stuff will that be ok or should I remove the cement again and expose the pipe then denzo the joints.

again thanks for the advice.

Cheers

Will