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

Ive used several kinds of air vent in hydronic heating systems. Most dont pass the test of time; they get corroded or scaled up and either leak or wont vent but these guys keep working for years and year. These are the only kind Ill use.

easy to replace

Needed replacement for a 1962 boiler. works fine venting the system.

Works good

Im buying this for the second time in 5 years - to replace the original which lasted over 20 years. Same brand / same part number, but no longer made in the USA, hence the much shorter life.

I was struggling with air in my baseboard heaters and kept trying to bleed the system and the noises kept coming back. Someone suggested I give this a try. I installed it, which was very easy, and the noises immediately went away. Wonderful! Couldnt be happier.

Used on a 30 gal hydronic buffering tank. Works perfectly. Let’s air out, keeps water in. Get it.

exact replacement - works fine

Works great on hot water systems

Package was beat up. Product survived, though.