Winterizing Quick-Connect

I want to make up an anti-freeze quick connect hose so that it's ready come the fall and no last minute scrambling. My dealer told me they do this when they winterize their inventory of RV's. They pull the units' fresh water hoses into the water pump and use a separate hose into their anti-freeze container and go from unit to unit winterizing them in no time.

Pulling this hose from my pump I noticed that it's larger than a standard household water quick connector. I'm not getting any response from my emails to the dealer on where to find this different size. Does anyone know who might stock these size quick connects?


thanks, Kim