[time-nuts] 1" 14 tpi UNS die

Chuck Harris cfharris at erols.com
Tue Jul 7 18:35:57 UTC 2009


bg at lysator.liu.se wrote:
> Hi Chuck,
> 
> Been living in Sweden my whole life. And almost exclusivly in houses
> heated by circulating hot water through radiators. I have yet to spot an
> O-ring.
> 
> Where in Sweden did you see this strange system?

Hi Bjorn,

In the US, hydronic heat comes in a couple of flavors:  The old fashioned
cast iron radiators, fin/coil baseboard radiators, radiant baseboard, or
steel radiators/towel warmers imported from the Europe.

Most of the European systems are geared towards PEX tubing, and compression
fittings... and untapered pipe thread with jamb nuts and O-rings.

The US cast iron radiators all use tapered pipe thread, fin coil is almost always
soldered copper, and the steel radiators from Sweden/Denmark/Norway/Switzerland,
and Italy, all have straight pipe thread, and use a Jamb nut with an O-ring.

Runtal, Cordivari, Wirsbro and Wesaunard are examples I have run into.

I have also run into this system in shut-off valves, manifolds, flow
control valves, air eliminators, ... all coming from Europe.

Do you install and repair systems?  Or just live with them?

-Chuck Harris






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