Rusty radiators in new build

Nanpy

I moved into a new build about six months ago and have been happily using the gas central heating for most of that time.

Yesterday I noticed that there was a bead of water on one of the nut and olive joints where the piping coming out of the floor connects to the radiator valve, ie before the valve so not a great place for a leak. There was obvious rust or discolouration where the threads were visible and a small smear of discolouration down the pipe. It's obvious a tiny leak at this stage but it shouldn't be there.

Ordinarily I'd be happy enough to just try and give it a swift quarter turn, but I noticed the nut seemed a little rounded as if it had already been forced and I was wondering if it might have been cross-threaded. I'm kicking it back to the builder to fix because why be a hero, right?

I had a look around the rest of the radiators and the ones upstairs all look fine, while the ones downstairs all seem to have that same rusty look on the exposed threads.

Even if they're not leaking, I'm right in thinking they shouldn't be rusting, right?

http://imgur.com/3pbh1wA

Grenage

Looks like bad joins to me; they've obviously got slow leaks where it isn't sealing properly. There shouldn't be any rust on the visible threads, because there shouldn't be any liquid to cause it.

As you say, don't be a hero, get them to sort it.

DaftyDuck

Look appalling. Grooves on chrome make it look like water pump pliers were used, that'll rust and look poor. Joints are weeping and certainly rusting from it. Also, who needed an entire roll of PTFE for the radiator socket?

I'd check all your radiators with a fine-tooth comb. I might even get a decent plumber in for an opinion.

Nanpy

Mine was the last house in the development, so I've already had plenty to talk to the builder about - eg a missing signal cable in the loft that meant the solar heating panels wouldn't work, smoke detector in the kitchen that was supposed to be a heat detector, three pop-up basin plugs none of which were in the right basin so that none of them actually sealed, leaky guttering and a load of little irritants.

I've just been round all the radiators again to be sure, there are two bad ones but the rest seem fine. The builder has been fine putting stuff right so far so I'm sure it'll get sorted.

southcoastrgi

I bet u've got towel rails ?