Can you push the male end of an endfeed street elbow into a cuprofit
pushfit connector?

I suspect that the endfeed connector isn't long enough.

Another question...are very tight bends a problem in radiator
circuits? Will they create a noisy system? I want to have a 22mm pipe
that doubles back on itself. Can I create this with two elbows or
should I use a preformed return bend like BES 7982?


TIA

Mr F.

In article , Mr Fizzion
<wankel@rotary.engine> writes

>Can you push the male end of an endfeed street elbow into a cuprofit
>pushfit connector?

Just measured the straight length 'wanted' on a speedfit (not cuprofit) and
that was 30mm so it doesn't look promising.


>I suspect that the endfeed connector isn't long enough.

Think you're right & it might work at first then leak later (bad). I'd be happier
if it could be shown that there would be say 5mm of copper after the O-ring
but not otherwise, also is the surface of the street bend absolutely smooth
like the pipe is, would the O-ring seal as effectively?


>Another question...are very tight bends a problem in radiator
>circuits? Will they create a noisy system? I want to have a 22mm pipe
>that doubles back on itself. Can I create this with two elbows or
>should I use a preformed return bend like BES 7982?

I'm sure there's a good reason for the doubling back so I won't ask ;-). If it
was in the primary circuit where virtually all the flow was passing then I'd
avoid using tight bends as you can get noise & I've seen funny oscillating
pressure fluctuations in a system with tight bends and Ts close to the
boiler that I put down to the abrupt transitions. Those return bends are a bit
steep (didn't look this time) so I did any required on mine with a pipe
bender; v large radius for 22mm but were accommodated ok with a bit of
thought.

Ok, I'll ask, does it really need to double back . . .
-- 
fred