17-02-2014, 11:44 AM
(17-02-2014, 11:40 AM)pwdrive Wrote: Definately not a plumb bob, looks like the bottom end of a tank dipping tape, the tape would be attatched to the loop on the end.
Lawrence.
Yep - that's what it is. The graduations also serve to indicate how much sludge is at the bottom of the tank by looking for smears on the weight.
Colin
