A
ADM360
Sorry didn't mean to ruin your day!! But I think these issues need to be sorted now before to much more work is done!!
If the TRV's are suitable for a 1 pipe, then they would work on any system!! But the ones in the photo look like standard merchant style TRV's, so when he say's that they are universal he probably means bi-directional as nearly all TRV's are theses days means they can be retro fitted to either end of the rad!
This is all supposition as without seeing the install I couldn't give a proper opinion!!
But looking at the way the install has been put in I can't think the builder went all out on the trouble and expense of full bore TRV's for one pipe system!
Maybe if you ask on here there might be someone near by who could/would pop round and give you a on site appraisal /professional opinion.
I'd be happy to if your near by, South Somerset!!
If the TRV's are suitable for a 1 pipe, then they would work on any system!! But the ones in the photo look like standard merchant style TRV's, so when he say's that they are universal he probably means bi-directional as nearly all TRV's are theses days means they can be retro fitted to either end of the rad!
This is all supposition as without seeing the install I couldn't give a proper opinion!!
But looking at the way the install has been put in I can't think the builder went all out on the trouble and expense of full bore TRV's for one pipe system!
Maybe if you ask on here there might be someone near by who could/would pop round and give you a on site appraisal /professional opinion.
I'd be happy to if your near by, South Somerset!!