Plastic water pipe slightly scored

[john2k]

OK so i've had a little DIY mishap. I was cutting out a opening to surface mount a device on my wall. In hindsight, i should have checked for water pipes in the wall but I really didnt expect water pipes to be in there. So Behind the dry wall was a small piece of ply so i drilled small holes to break a section of the ply out. But when drilling i was careful to go gently and not go to far in just incase there were wires. So anyway after cutting out the ply. On the very far corner I just managed to catch hot and cold water pipes running to the WC. One of the pipes has a little bit of scoring from the drill touching it. At most the deepest score will probably be 2-3mm if that. I've attached a photo. It's the hot water one that has the most scoring. From what I understand these pipes are quiet thick. Is this something that will need to be fixed to prevent leak or should it be ok?

Photo below: it's the pipe on the far left that has the most scoring.

 

[john2k]

Also noticed the pipe on the right which is the cold water pipe has scores on the side and a few tiny holes where the tip of the drill touched. So far there are no leaks. My concern is will this leak over time? Can I apply anything on top as a precaution?

 

[gasbusters]

Also noticed the pipe on the right which is the cold water pipe has scores on the side and a few tiny holes where the tip of the drill touched. So far there are no leaks. My concern is will this leak over time? Can I apply anything on top as a precaution?

Personally id not take the chance. 2-3mm is pretty deep, thats probably more then half the thickness of the pipe. Id personally just cut the sections out and replace those bits of pipe, trying to avoid leaving any joints hidden in walls.

 

[dilalio]

+1.

Unfortunately, it happens. Done it myself plenty of times. Get them changed.

 

[john2k]

It's been just over a week now and still seems to have no leaks. The pipes go to a WC which I plan to renovate in 6-12months time at that time I can fish new pipes through but in the meantime as long as I keep an eye on the pipe in that opening should be ok? The surface mounted device is easily removable for inspection behind it so I'll just keep and eye on it.

When I run new plastic pipes, do I need to insulate the pipes in the cavity? Some of it currently has some sort of aluminium tape wrapped around it

 

[ianmcd]

leave it at your peril, I would cut it out now, not exactly a big job

 

[dilalio]

What could possibly go wrong! If that's within your risk-assessment then you're free to do as YOU choose

 

[DavidLewis]

do I need to insulate the pipes in the cavity? Some of it currently has some sort of aluminium tape wrapped around it

The aluminium tape was there so that your metal detector worked, to stop you drilling into the pipes