Why TRVs com with rad tails?

JohnArnoldBrown · 6 Jan 2015

Is there a reason why TRVs all seem to come with radiator tails?
It seems it would be much quicker to replace an existing valve using the existing tail. Same goes for the olive and nut on the pipework, although I can see how a pre-used olive might cause problems. Is it because the flange type joints aren't standardized?

Dan Robinson · 6 Jan 2015

What happens when you fit a new radiator?

What if the existing tail is three quarter inch?

Is this a wind up?

stardanny · 6 Jan 2015

You still need new radiator tails for new heating system.

Daniel.

jeff the gasman · 6 Jan 2015

The flange joints were available some years ago on TRVs
I think they were Giannoni valves if I remember correctly.
Haven't seen them for ages.
Jeff
Edit
Danfoss commercial valves are with union.

JohnArnoldBrown · 6 Jan 2015

"Is this a wind up?"
No.

Maybe I should rephrase.
If I want to fit TRVs on existing radiators that already have tails, and the flange size/thread on the TRV matches the rad tail, is it still advisable to change the tails?

jeff the gasman · 6 Jan 2015

No. Just use a little jointing paste.
Jeff

JohnArnoldBrown · 6 Jan 2015

Thanks.

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Why TRVs com with rad tails?

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