Quote:
Originally Posted by firesquirt
It is ok to fill your tank till the water comes out the vents, it is designed for this, the force that is seen by the tank when water sloshes around a half full tank is far greater than when it is full (tank surge). It is actually safer to travel with it full to the vents than it is partially full, ask any over the road tanker driver.
I have seen half full water tanks burst a few times but never on a full tank.
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When I was a youngster I drove an 18 wheeler tanker. Carried a product called Alum (mix of sulfuric acid and bauxite) used in paper mill settling ponds IIRC. The tanker had baffles in it to try to eliminate or at least slow down the wave action. This was back in the late 60s so I think pretty well all OTR tankers have those baffles. Would be a good idea for the RV FW tank but then again another $1.50 on the price of a new unit.