Filling fresh water tank

jjjandrbaker wrote:


That, I did not know! Thanks for the tip. I always thought the more pressure, the faster it was filled. Yikes! I've been lucky.

Up to a certain point that is true but the system has to be able to vent as fast as it fills.

The tendancy is to stuff the end of the hose in the hole and walk away to do something else while the tank fills as some of the large tanks can take a long time. By doing this you are only allowing the much smaller vent tube along the side of the larger main tube to vent off the air because you essentially cut off any venting action of the fill tube with the end of the hose stuffed in it. On some systems the vent tube cannot keep up and the tank begins to pressurize, that's when running full blast can be an issue. Also if you walk away and don't notice when it becomes full and if the hose becomes lodged in the fill spout the hydraulic pressure of the incoming water will swell the tank as now the vent can't dispell the water as fast as it is being forced in.

On the other hand if you stand there and hold the hose with an air gap between the fill spout and the end of the hose you usually can run it in at a much higher rate without problems because the end of the hose isn't trapping any venting air coming out of the fill tube and you're there to shut it down when it is full.

The walk away method is the one where you have to be very careful and not run too high of pressure.