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Whatever happened to the Honeywell MZV series zone valves?
Geosman
Member Posts: 37
Odd that as of March 2020 Honeywell stopped production of the MZV series zone valves, replacement cartridges and power heads. Does anyone out there know the reason or if there may be an alternate source?
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Comments
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e-bayBob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
I believe the MVZ valves were made by a company called SPARCO some 20+ years ago. Honeywell purchased that company and continued to produce many of their products under the Honeywell Brand. If you want to keep the valves operating, you may need to look on auction sites like eBay or Craigslist
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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Wirsbo, Uponor also used them for awhile.Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
As did Burnham and likely a number of others. It's just odd that the supply simply dried up with no trace of replacement parts. I think I found the last from Supply House as well as from Amazon. Some on e-bay are also sold out one was asking 4X normal trade price.0
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Aren't the valves compatible with other powerheads?"If you can't explain it simply, you don't understand it well enough"
Albert Einstein0 -
@Geosman, does anyone know if this actuator will work? There are several adaptors included
https://s3.amazonaws.com/s3.supplyhouse.com/product_files/Uponor-A3023522-Product-Overview.pdfEdward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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I know the thread would work, it would depend on the pin stroke if a thermo-electric head would work. This is a Sparco on a Caleffi thermo-electric zone valve body.
If the valve is old and sticky you could blow up the actuator. That was common with the HW, Sparco and Wirsbo when crappy water caused the valve pin to seize up.
Might be worth replacing the entire valve?Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
Shows them in stock here and on other website, but you never know.https://ordering.fwwebb.com/woitem/268882*1?CAWELAID&gclid=CjwKCAjwj975BRBUEiwA4whRB7XrhLFdDWZtyqrl_h9WB0yGrj79a3Tmbg4s18TTs0ynuj27XOMa3hoC-9QQAvD_BwE8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab0 -
Geosman, did you figure out a replacement solution for your zone valve? Does the Upanor actuator work as a replacement?
John0 -
Actuator is not the problem. It’s the cartridge that was leaking around the pin. It’s holding without leaking with my needle nose vicegrips. It’s for a sunroom zone so it now gets circulation with other zones. The only solution is an identical cartridge. Those on the 1” valves do not fit...I tried that already using the last 1” valves in Supply House inventory. Now have a 3/4 valve I found at a supply in Ft Wayne that’s now waiting for my next trip to replace it.0
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