[Wifi-1]

Originally Posted by fatlazyless

With one pipe steam, some heat systems have the water hammer noise and some don't. With one pipe, the steam flows upward from the steam boiler in the basement within the upper half of the pipe, and the cooler hot water returns down to the boiler in the lower half of the SAME pipe ...... as water, and not as steam. The hammer sound happens when there is not enough room in the pipe for both steam and water to be flowing comfortably in opposite directions. 1 1/4" diameter, black iron pipe is usually what is used so there's enough room for both steam and water without the hammer sound otherwise the opposite flows collide or get squeezed together causing the hammer, like with 3/4" or 1" diameter black iron pipe, or with 3/4"copper that's too tight for the opposite steam/water energy flows. Water turns into steam at 212-degrees at low pressure and has a lot of heating power ..... those big cast iron radiators will heat up fast .... and steam doesn't need an in-line pump (ie water circulator) to move it along ..... it gets moved by its' own pressure.

Wasn't there a Three Stooge's episode from maybe 1947 where they was plumbers sent to fix the water hammer for a tall, blonde, lady, home owner who was upset by all that hammer'n sound. Curley, Moe, and Larry to fix that water hammer ....... whub-whub-whub-whub! .... we'll fix it for you, lady ........ no problem! ..... this will be all fixed in no time ...... just watch us fix it! ....

For the Three Stooges to be work'n on today's 2019 high tech heat'n systems they would need to return to heat'n school and get trained as high tech, heat'n technicians .... and be goin' beep-beep-beep ...... instead of whub-whub-whub. ...

I'm sure the rest of us that care, already know how they work....Thank you