USA Water softener waste air gap

[Welder]

Hi all. I recently fitted a water softener that a customer had bought. It came with a fitting that pushed into the top of a 40mm waste upstand to create an air gap. I'm now fitting another softener that does not come with a fitting but also requires an air gap in the waste. Any ideas where I can get a fitting similar to this for a 1/2" or so hose, or how I can create an acceptable air gap. Water Softener Airgap 3/8"

Its a tundish. However, as going into open waste then it needs to be a closed version like a hotun otherwise airborne can get through.

 

[Welder]

I'll be honest I've never used one as wasn't aware they were required. Tried finding one online today and the only thing I can find is this.

https://www.amazon.com/Universal-Softener-Air-Gap-standpipes/dp/B00W2A9RCS

I will be asking at my merchants tomorrow though for future installs.

That's USA not UK

 

[ShaunCorbs]

Its a tundish. However, as going into open waste then it needs to be a closed version like a hotun otherwise airborne can get through.

Or trapped after connection / pipe to main drain