Taco 400-4 1/8-Inch-NPT Float Air Hy-Vent

works

Solid construction, made of heavy metal, 2-3 years and hasn’t leaked or corroded as far as I can see. Although I have not attempted to open it up and tune/clean it, the option is there. But I have to say, banging noise in the heating system was reduced but not totally gone after installing the Taco 400 pressure valve. Still much better than my previous annual installs of Misty Maid brand vents which always leaked and corroded at the vent caps. Recommended.

works good

Replaced my Maid-O-Mist, that came with my house. It was old and crusty, and I would have to press the schrader valve to let the air out periodically. I havent heard any gurgling at all this fall from the pipes. I almost want to introduce air to the system to see what happens. So far so quiet...

Product was poorly packaged with no protection. Luckily the item wasn’t damaged

Package was beat up. Product survived, though.

Feb 2017 update: Its 2017, but I noticed that I havent had a leaking Hy-Vent since I installed a heat pump hot water heater in 2015. This means the hydronic system never fires up to provide domestic hot water during the non-heating seasons. Whereas the oil furnace used to run daily to make hot water for laundry/showers/dishes, now it only runs September to April/May for baseboard heating. I should expect the Hy-Vents to double their service life from 3 years to 6 years. Original review: I would have given it 3.5 stars if possible. It does a great job of purging air from my hydronic/baseboard heating system zones. However, I have been marking dates on them since we remodeled our house 4 years ago, and none of them are older than 3 years. The culprit is always leaking water from the top cap, and I always find that the o-ring has been deformed permanently from just 2-3 years of use (see photos of failed vent valves that Im replacing with new ones I just purchased from Amazon). I would have given it 5 stars if Taco would sell a 3-pack or 5-pack of o-rings for say $2 so I dont have to toss an entire vent when only the o-ring fails. I expect these new ones to not last past 2017. Replacing these vents at the zones is fairly straightforward with only minor water spills and leaks to collect since I have a pair of shutoff valves at each zone. The one on top of the expansion tank is the most challenging since a lot of water comes out of the tank; Im going to use another reviewers advice and install a shutoff valve the next time the expansion tank vent fails.

Worked well

works great

Works well. Before I installed this there was some gurgling in our hot water heating system due to trapped air. Shortly after installation that all stopped. This is our second season of use with it.