Roof Gutter Underground Draining - Flow Limit?

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Old 05-01-20, 09:16 AM
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Roof Gutter Underground Draining - Flow Limit?

My roof gutters extend underground presumably to the storm drain / sewer. Just above the ground, there's an opening that I assume is for overflow. Is there a general limit on how much water can be pumped down that drain? I'd like to use it to drain water from the pool cover. Any concerns?
 
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Old 05-01-20, 09:42 AM
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There are not specifications or code requirements for how downspouts are drained so... you could have anything underground. The only way you'll know if the drain can take enough water is to try it and see if it works.

Long ago downspouts were plumbed to the sewer but anything relatively new is not. It's even prohibited by current code so if your house is newer it probably drains to daylight somewhere or to a French drain.
 
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Old 05-01-20, 09:50 AM
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The house was built 27 years ago. My only concern is if the water is being dumped underground and it empties against the foundation. I am destroying the landscaping/mulch/etc. as the pool cover is drained off so I'd like somewhere to put it. I could pour it into the hole and see if it simply drains but... No idea where it goes
 
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Old 05-01-20, 01:00 PM
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The storm drain is right in front of my yard and there's a large tub pouring water into it. We had a TON of rain last night. As soon as the draining stops, I am going to dump the hose from the pool pump into the downspout and see if it comes out into the sewer. If so, can I assume this is safe? It wouldn't dump to the sewer and the foundation, right? No plans for the house to see what was done underground...
 
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Old 05-01-20, 01:46 PM
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Wherever the drain leads it should not be near your house or it's foundation. Anyone going to the trouble to bury the line would have directed it away from the house.
 
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Old 05-02-20, 07:56 AM
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You need to identify the difference between your sewer system and a storm drain system. Surface runoff and rain water should go to the storm drain.

Your sewer system is either a septic system with field lines or a municipal system with a treatment plant.

Some photos may help us help you identify what you have.
 
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