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What is the second PVC pipe for that I see on some of these sump

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What is the second PVC pipe for that I see on some of these sump systems? One is obviously water discharge, but what is the other?
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Disregard. This is a twin sump system.
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>>1221832
Kek. Dodnt know that existed
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>>1221830
Could be for radon too.
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>>1221830
fart pipe
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>>1221830
Is that the vent so the vacuum can be broken when pumping?
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File: 1501698973387.png (384KB, 525x421px) Image search: [iqdb] [SauceNao] [Google]
1501698973387.png
384KB, 525x421px
>>1221975
>tfw my sewer sump pump gets vacuum locked
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Pump's gotta vent.
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>>1221832
looks like the black box there is for a battery for the battery back-up pump which is a separate unit then the 'regular' pump that runs off the house's electrical system. the orange 'hockey puck' is the sump over flow alarm. it will emit an ear piercing 'alarm' sound when the water level in the sump well reaches a certain level.
other possibility for the 2nd PVC pipe is for radon venting(?)
Thread posts: 9
Thread images: 2


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