I'd recommend getting a weld on threaded fitting instead of hoping a
washer would be thick enough. Like:
http://www.mcmaster.com/#weld-on-tank-fittings/=121uxnj
Regards,
Mark Miller
markmiller@threeboysfarm.com
On 4/18/2016 11:00 AM, shop-talk-request@autox.team.net wrote:
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> I have an old steel L tank out behind the shop that goes i the back of a
> pick up and I was considering refurbishing it for diesel containment.Overall
> it is in decent condition, but I planned to clean out the inside - maybe some
> acid treatment and a coat of fresh paint on the outside. On the bottom is a
> half inch hole and it may have been tapped, but the metal is not that
> thick.Generally I would think a socket head plug would go there to act as a
> drain, but I am not sure there is enough steel there to form a reliable
> seal.Any ideas on how to best treat this? I could tap for a plug and try
> it... I considered welding or JB Welding some large washers to provide enough
> meat to allow a socket plug to work..Any other appropriate "stoppers" come to
> mind? I was also considering just sealing up the hole on the bottom and
> adding a drain on a vertical surface near the bottom. MattColumbus, GA
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