Venting sumps

UST, service station, bulk plant, car wash, commercial refueling installation, design and construction.
rides426
Pump Jockey
Posts: 8
Joined: Wed Dec 14, 2016 4:40 pm

Re: Venting sumps

Post by rides426 » Fri Apr 05, 2019 1:08 pm

Old sites just aren't perfectly tight. An old site might leak few droplets of liquid a day/week will build vapors if there's no circulation. Especially if there is water tight manway lid.

ZMiller
Head Tech
Posts: 957
Joined: Sun Jul 15, 2007 10:53 am
Location: Atlanta/Phoenix/Sacramento

Re: Venting sumps

Post by ZMiller » Fri Apr 05, 2019 2:30 pm

With a point being? Wouldn't it be cheaper to prevent the few drops than repiping with vents, piping and blowers to the canopy? The problem is that it may be more than just a few drops per day.
When you are dead it's likely you won't know it. It could be difficult for others. It's the same if you are stupid.
"Tact is the ability to tell someone to go to Hell in a way that they will begin looking forward to the trip"

jjames
Head Tech
Posts: 43
Joined: Tue May 09, 2017 3:03 pm

Re: Venting sumps

Post by jjames » Thu Jul 25, 2019 4:03 pm

ZMiller wrote:
Thu Apr 04, 2019 7:32 pm
Will some bright person tell me why there are vapors in the sumps in the first place?
Leaks ( I know you know that).

Cork type tank top manway gaskets leak vapors. There are other sources of leaks - but this is the one that is hard to deal with. 9/10 leak some, even when brand new. Leaks are very small or minute and are difficult to detect without special equipment.These small leaks cause vapors to congregate in the sump overtime, and will eventually lead to problems in the sump. Sumps may not be opened for several months. Replacement of the failed gaskets can resolve the issue temporarily, but cork gaskets will eventually produce small leaks again.

The best solution is to get the manufacturer to switch the design of the gasket to something that is more reliable, such as synthetic rubber / fluoropolymer elastomers.

ZMiller
Head Tech
Posts: 957
Joined: Sun Jul 15, 2007 10:53 am
Location: Atlanta/Phoenix/Sacramento

Re: Venting sumps

Post by ZMiller » Thu Jul 25, 2019 6:46 pm

Thank God there is someone out there with their head not buried in the sand.

I agree 100%.

Now we are getting to one of just a few roots of the problem instead of wasting time treating symptoms.

Thanks for posting some logical insight.

It's an honor to be in a group with at least one other logical thinker.
When you are dead it's likely you won't know it. It could be difficult for others. It's the same if you are stupid.
"Tact is the ability to tell someone to go to Hell in a way that they will begin looking forward to the trip"


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