It should be a 1/2" inverted flare, that is the same as brake line nuts, fuel line nuts, Napa should be able to help round one up or check Dorman parts online and get the part number. Edit- Dorman does not list a nut for 1/2 inch tube, McMaster-Carr has one but the price is stupid. Can you salvage the tube nut and fabricate a new nipple from soft copper, it only needs to be long enough to clamp some 1/2 inch hose on it. You could also remove the brass inverted flare x male pipe thread street 90, then you could use pipe thread fittings in place of the inverted flare. If you go that route, don't get too crazy when you tighten the pipe fitting into the cast aluminum HydroVac housing, it could crack easily.
Last edited by 78buckshot; 03/31/2025 9:53 PM.
