Barry, rig up your shop vac so's to pull a vacuum in the tank (in other words, plug any vents) Duct tape, Saran Wrap, whatever.
THAN do your drilling and fit your sheet metal screw / plug.
You'll note that their will be little if any tendency for the plug to "weep".
Leave the vacuum on and CLEAN the repair area with acetone / MEK. Devcon Plastic Welder would be my first choice ,....BUT it doesn't always stick to every plastic,....ABS in particular.
Try the vacuum stunt next time you have to disconnect / change out a hose from a large tank or sump, and draining is just not an option.
GTC
Shop vac and gasoline is a deadly combination....unless they make an intrincly safe shop vac....
W A T E R,...I believe that's what the tank discussed contained ?
Diesel ?,...No problems , thus far ( but point taken)
Hydraulic Sumps ?,...I'll continue doing it with plain old shop vacs.
Thanks for pointing out the Gasoline hazard !
GTC
