Back fill via radiator plug

[Spookytooth]

I've fitted a new downstairs radiator and both it and the downstairs rad I've "spurred" it off refuse to get hot. I'm confident the pipes are connected correctly, and the new rad is fitted with a bidirectional TRV. All other rads and hot water work fine, so it seems highly likely I've got an air lock. It's a standard vented system with a fill and expansion tank.

Trying to clear the air lock in the usual way by turning off all other rads doesn't work.

I think I may need to back fill using a hose pipe (acknowledging care needed to ensure adequate F&E overflow arrangements). Unfortunately I didn't fit a lockshield valve with an integral drain cock to the new rad.

My question is this: to save me draining everything down again, is there any easy way to connect a hosepipe to the air locked rad via the radiator plug aperture?

Thanks in advance for any advice offered. Sorry if this has already been answered, but I did do a fairly thorough search.

 

[45yearsagasman]

I'm confident the pipes are connected correctly,

Now where have I heard that before.

 

[Spookytooth]

Not much help, but pretty quick!

 

[compheat]

If you turn both sides of the rad off then you can remove the blanking plug.
Check to see if water is comming out of the vent if it is then it shouldn't be air locked.

If you turn both sides off the rad off, open air vent then turn one side of rad back on untill the valve starts getting hot, then turn that one off and do the same to the opposite valve that proves that water is circulating,

 

[Spookytooth]

In the end I didn't need to backfill, the airlock cleared on it's own overnight.

Seeme the pipes were correctly connected!