CO2 Distributor from Northern Brewer -- Ball or Duck-Bill Check Valves?

[dutchoven]

I'm looking to upgrade my CO2 distributor to MFL connections and am looking at this manifold from Northern Brewer: CO2 Distributor 4-Way w/ 1/4" MFL shutoffs.



According to the description, the valves have " integral check valve to prevent backflow of gas or liquid." Does anyone know if it has ball check valves or duck-bill check valves? I've had some bad luck with the duck-bill check valves, hoping this one uses ball check valves. Surely someone out there uses this manifold ...

Thanks.

 

[ThreeBrothersBrewery]

We have that very manifold. I'm pretty sure it's ball check valves but not 100%. No complaints on it so far after almost a year. We did have a small amount of beer get into the gas line but that was our fault. Over filled keg plus dramatic pressure change. Even still it never got to the manifold, just a tiny bit about 2-3 inches up the line. Hope that helps.