zone pumps to zone valve conversion.

hot_rod

Generally the decision to zone with pumps or valves comes down to personal preference, and maybe past experiences.

When you see an installation with a wall of zone pumps, maybe 4 or more, that system is probably over-pumped. 6 zone pumps on an 80K boiler would be an example. All pumps running way to the bottom of their curve with wire to water efficiency below 20% on a common PSC type circulator.

With the acceptance and wide availability of ECM delta P type circulators, the potential to drop considerable power consumption and have better flow control over the zones could be an option.

A backup pump piped in or on the shelf could ease the worry of a single pump causing the entire system to be down.

Siggy had this thought so I built up a prototype.

Thoughts or suggestions?

GGross

Was it very tricky to get the same port to port length as the pump or did you get it first try?

HydronicMike

Pretty cool idea. I did something similar for flushing older systems. I made up a straight pipe with two flanges (connected to iso flanges) to flush the system, initial purge it, then swap out the blanks for circulators. To me I think it's a way to keep junk getting lodged into impellers.

hot_rod

pump spacers, handy for piping systems for the correct spacing

, too

hot_rod

https://forum.heatinghelp.com/discussion/comment/1882568#Comment_1882568

Yeah, it took a few flange brand tries:) This is where BSP threaded pipe shines, Loctite or hemp the threads and stop wherever you want.

A copper sweat version is pretty easy to get "exact", but the sweat flanges are more$$

bjohnhy

Where do i put in an order for these?

GroundUp

Neat idea and all, but don't we need to repipe anyway to add a system circ?