Do water pipes in walls need silicone added to holes studs?

Hiya,

We are at the framing stage of our build and have looked at the plumbing going through the framework. When the pipes pass through the frame, some of the holes that have been drilled have been filled with silicone around the pipe and other holes have not.

Is it a problem if its missing? I'm worried about knocking noises when the taps are turned on, but on the other hand the pipes are plastic wrapped (pex?) so it's likely not a problem.

Any advice would be awesome!

Thanks heaps!

Silicone or gap filler?

No gap filler used, just silicone in some of the holes.

I siliconed the holes in our build myself. I read on here it was a good idea so bought a couple of tubes and snuck in one arvo

They should be siliconed but a lot of plumbers don't because of time. Not that it takes long!!

I wouldn't be concerned too much though, unless you have a steel frame where the pipe should be protected against a sharp edge.

Thanks all. Went and did it myself. Took 10 mins.

Cheers!

::angry:: ... I really wish that people would not make general statements based upon one paragraph of info.

Thanks! Thought this would be the case. Yet another set of standards Porter Davis's tradies ignore.

You have to be careful as to how you interpret Standards and you must also be aware of local regulations (if applicable) and the manufacturer's instructions.

Re your plumbing, copper pipes are un-insulated but pex pipes are considered to be insulated. The formula used to calculate the thermal conductivity of pex pipe is 0.46 W/mK (Watts per metre Kelvin).

The pex pipe manufacturer's instructions will specifically mention installation requirements on steel and timber framed houses and the need to also allow for lineal and thermal expansion.

A pex manufacturer's fitting instruction that I sometimes see pushed to the limit is the pex pipe's maximum cold bending radii which is usually x 10 the pipe's OD...just something to be aware of.

Re manufacturers instructions, you would be amazed at how many different products are installed contrary to manufacturers instructions. Never assume.

Could you be a little more specific about just where your anger is directed ?

More to the point, do you agree or disagree with the OP putting silicon (hopefully neutral cure) where the pipes go through the frames ?

PD