3/4" Sweat Zone Valve (Connection = 18" Leads)

I am in the process of replacing a gas boiler and the zone valves, and the job is not finished yet...I am a DIY senior. I was skeptical and feared that when received, the valves would not be interchangeable with the old ones, as I did not want to replace the valve bodies, just the guts; got the valves and could not wait so I removed the guts from the old ones and new ones and swapped them; it was a breeze. My hat is off to this manufacturer. The price was right, the shipment arrived in just a few days and the instructions were clear.

I say these are a double edged sword because, in my experience, the failure rate tends to be fairly high but they are also very cheap, very simple, parts are plentiful, and they are easy to service when they do fail. I just renovated the entire hydronic heating system in my 60 year old home (which previously had these) and had to decide between sticking with these or changing to the Taco 570 series valves. The only reason I decided to stick with the Honeywells (four brand new ones) is due to the fact that I already have an entire bin full of parts for them, including FIVE complete powerhead assemblies, plus additional motors, end switches, o-rings, and valve components. Bottom line is I have enough spare parts that I probably won't need to actually pay for anything for another 20+ years. Had I switched to Taco valves I may have gotten 20+ years of service out of them without a problem (MAYBE), but would have spent more money and would have been left with zero spare parts in the event of a failure. If you are starting from scratch though, I would probably recommend you spend the extra money on the Tacos (or Caleffi). Or just use individual zone circs. In my experience every single Honeywell V8043 is going to need to be serviced one way or another within 5 years. It'll probably be a minor failure that is fixable within 10 minutes, but its still annoying when you walk into a room in your home to find that its 60 degrees, calling for heat, and the radiators are ice cold. Of the four brand new ones I bought for my recent renovation, one of them failed within a month. Of course SH was great and shipped me a replacement powerhead immediately at no charge.