Cylinder specs.

[Hugh Jaleak]

I am curious as to the difference between indirect cylinders for gravity and fully pumped primary systems. I assumed a standard indirect would be suitable for either, but obviously not after reading this thread:

http://www.diynot.com/forums/viewtopic.php?t=199922

Could someone more knowlegeable than me explain the differences please, and satisfy my curiosity??!!

 

[kevplumb]

normal cylinder has a 22 mm coil in it can be used on gravity

other high recovery types have a pancake coil of 8 / 10 mm which must be pumped

 

[Hugh Jaleak]

Cheers Kev, that makes sense, I havent come across one with a smaller diameter coil yet. I would assume its marked on the cylinder as to its suitability for gravity circuits.