Saltidog writes
โDo not people have access to open end wrenches any more? Why would one want to use a socket that only contacts a square nut at the four corner points? (BTW, that suggests using a socket with a number of points devisable by four... eg NOT six...)โ
You must not have a Atwood?
The placement of the drain plug pretty much precludes the usage of ANY open end wrench.
The real easy way to remove the drain plug on a Attwood IS with a socket since you can add a extension to get the ratchet OUTSIDE AND AWAY from the control valve that is in the way.
You might get a open end wrench on the plug, but there is no place to swing it, it will hit the control valve or the tank shroud and you canโt get your hand in there to get leverage.
I was too tired to look it up last night but here you go..
USING 12 POINT SOCKET TO REMOVE SQUARE BOLTSee post number 4.. which I will quote..
โA 12-point socket can be used on a square nut if it happens to fit close enough. The teeth of the socket do not match the angle of the corners of the nut, but often will get the job done. I believe that one reason older socket sets have so many /32" sizes is to they would fit square nuts.
I broke several SK 5/8" 12-point sockets by using them on square head bolts when I was young and stupid, so I speak from experience.โGranted, using a 12 point is โless than idealโ, truth be told it CAN work in a pinch.
4/8 point sockets are not all that common in RETAIL stores, to find one you will most likely NEED to ORDER one. Not to mention buying a 4/8 point socket exclusively for this ONE TIME USE will be a waste of the OPs money since the chances of ever using that socket again are pretty darn low.
I know none of the stores in my area carry any 4/8 point sockets, I have looked due to dealing with antique engines which often are constructed exclusively with square bolts.
What you must do though is to find a 12 point socket that FITS as tightly as possible, you may find the need to try METRIC sockets which will have โin between sizesโ from SAE common sizes.
Another alternative is a โclaws footโ (AKA Crows foot) which is simply a shortened version of a open end wrench and has a square hole for a ratchet wrench or ratchet extension.. But once again no longer a commonly found tool in retail stores (you might find a small claws foot kit at Sears if you are lucky to have a Sears store)..
Not even sure drilling out the plug is an option, plug is at an angle and I doubt you will be able to get a drill to angle without the tank shroud interfering. The only hope would be to remove the entire tank from the RV, then disassemble the tank shroud from the tank..
Sadly I think a few comments of replacing the entire tank just might be the cold hard reality since the steel plug is harder than the softer aluminum.. The plug and any corrosion on the plug inside the tank most likely will deform/damage the threads. But with some care you may as well attempt a try, nothing to lose at this point, canโt drain it and if in freezing climate it will be toast the next winter.
