Do I relieve pressure in UFH loops while slab going off?

[Tom]

Slab poured today, praise be, and the pressure in the UFH pipes has been going off the scale - as in the needle on the gauge is right round and touching the zero-stop. I have relieved a bit of the pressure and brought it down to 5 bar, but wondering if that's the right thing to do?

[Mike]

Yes, I'd have done the same.