Recharging Mego flo air gap ? All aspects of plumbing questions and answers, help, tips and information

[swayzak]

Hello


I've followed instructions (from various sources, all pretty similar).


When I open the pressure release valve (after turning off main stopcock and draining tank with lowest hot tap in the house), it hisses for about 15 secs but no water drains through the tundish.


Is this normal or do I have a problem ? Am I doing something wrong ?

[kjones1829]

Do you have any photos, to begin with? Maybe the problem is on the tank or in the system itself. The hisses for about 15 secs but no water drains through the tundish is not normal.