Distance between fittings and circulator

Orangecoleahh

Is there a minimum distance between say a 90 and a circulator, on a oil fired boiler?

hot_rod

Best practice is 12D, 12 pipe diameters up or down stream. So 12" for 1" pipe or tube.

No flow restricting devices up stream of a circulator. Air separators are fine upstream.

But even pump manufacturers break this practice by putting check valves in the discharge of the volute. Go figure.

Alan (California Radiant) Forbes

If space is a concern, I’d pay more attention to the suction side of the pump, i.e. 10 diameters of straight pipe. 

hot_rod

12D, 12 pipe diameters, so for 1” pipe or tube 12” is best practice on both sides of a circ

no check valve or flow restrictive devices at the suction

But even the pump manufacturer break this rule with IFC checks  in the pumps

Erin Holohan Haskell

@Orangecoleahh I've merged your duplicate posts into one here to prevent confusion. Thanks.

neilc

Hi @Erin Holohan Haskell
there may be a glitch in the interwebs,
This is a second "merge" where I only see about 5 messages of this thread,(happened on another where I tagged you on the duplicate threads),
Where is all the starting messages to this thread?

Erin Holohan Haskell

@neilc, I usually merge the posts and then remove anything that is duplicate, like the OP's initial question repeating. I'll keep an eye out for glitches. Thanks!

neilc

@Erin Holohan Haskell
ty, for all you do,

RobertHoward

For optimal performance and to reduce strain on the circulator, maintain at least 12 inches of straight pipe between fittings like a 90-degree elbow and the circulator on an oil-fired boiler system. This helps ensure smooth flow and efficient operation