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Questions tagged [drainage]

Use this tag when the topic is about controlling water runoff, particularly near structures but also in yards or elsewhere.

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1answer
183 views

Is this dry well sturdy enough to walk over?

I am planning to install a dry well sold in HomeDepot in my backyard. I am wondering if this dry well would be sturdy enough to walk over. If anybody has installed this product, could you share the ...
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1answer
388 views

Bar-sink drain won't drain water

I have a new shallow bathroom sink that has no overflow. I put in a bar-sink drain cover (to prevent anyone from closing the drain), and the water doesn't flow down the drain. It just stands there, ...
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1answer
376 views

Extremely porous concrete to act as water drain?

Want to create a six to twelve inch wide porous concrete strip about thirty feet long in our backyard over a drain pipe. Normal concrete is porous but the concrete i want is extremely porous. So ...
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2answers
189 views

What pipe diameter, for gravity drain of a given impermeable area?

How do I calculate a sufficient pipe diameter, for handling a given amount of impermeable pavement? A general answer is best. In my particular case I have approximately 675 square feet of tile roof ...
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1answer
117 views

water drainage and maybe mold problem

I recently moved into a home that has a water run off from rains etc problem that was not evident when purchasing. We have graded the rear yard and put in catch basins and tiles to keep water from ...
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45 views

Cockroaches coming from floor drain in bathroom, way to prevent it?

Basically I have Oriental cockroaches coming from the bathroom floor drain. Now the floor drain is not really in use, as in there hasn't been water going in there as there is only a sink that works in ...
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1answer
58 views

Can I extend sump pump outlet with elbow outside the house?

My house has a sump pump that rarely turns on (maybe once a year). The sketch below shows the current outlet setup (blue line). The outlet at the house is only about 8" above grade. In winter, when ...
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40 views

Blocked sink, waste forced back when rodded

I drew a quick diagram here (you will have to forgive the crudeness): What started as a small blockage with slow draining has grown to be a near complete blockage. We put some water down and over ...
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29 views

what to fill surface water drainage trench with

Cabin is at bottom of steep driveway. Water runs down and into crawl space. One very large ditch about 15 feet up gets most of it. This ditch gets remainder. On hand - 1 inch round stone, tyvek, ...
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1answer
36 views

How to pave a small area but get maximum drainage / permeability

TL;DR: How should one going about creating a hard, smooth surface that drains well, where slope can't be used to achieve the drainage. We have a small 1/10th acre city lot, and two large dogs. Their ...
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29 views

Fence post behind retaining wall, drainage concern

I need to replace an old 2ft retaining wall(railroad ties) along my property line. There is not currently a fence there so I was going to take this project to add one. I am located in the PNW so there ...
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35 views

Proper grading around the foundation

I know that the moisture problem we have is being caused by positive drainage towards the house. I've seen recommendations for simply properly grading the soil (6 inch drop for every 10 feet) and ...
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2answers
38 views

Drainage issue, water causing foul odor in home

I live in an apartment building where the building is built on a concrete slab. There is NO overhead drain pipes or gutters and the water pools up along the side of the building next to my living room ...
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12 views

Is there any reference (or probably web/online calculator) to figure the size for downspout pipe for a known flow rate

The total flow rate of water collected by the gutter of my roof is known (50 L/minute). I need to figure the safe size for my downspout pipe for this roof. What's the minimum diameter for the ...
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2answers
61 views

Can I approximate flow rate of a roof with known flow rate of another roof?

My main building roof I need to know the flow rate (FR, for example Litre per minute) of water coming out from the gutter of this roof. The easiest way would be catching the flowing water coming out ...
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24 views

Calculate rainfall intensity

To help size drainage, I'd like to calculate the maximum rainfall intensity for my particular location. How do I do that? I've found data sources that will give me the average number of inches of ...
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0answers
23 views

Tree vs drainage foundation issue

I have been seeing expanding cracks around my home and slowly widening cracks in my foundation. I had three foundation companies look at it and all three said different things. Excavate front of house,...
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1answer
39 views

Is my soil adequate for a dry well installation to collect roof runoff?

I did a soil percolation/infiltration test to determine how quickly water drains through the soil: Dug a hole approximately 12" in diameter to the planned depth of the dry well. Filled with about 2 ...
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315 views

Drainage for stairs to garden-level basement entrance

I have some concrete stairs that go down a few feet from the back yard into a basement door. During a heavy rain, water pools on the bottom stair, eventually coming in under the bottom of the door ...
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281 views

Properly fill small sinkhole near meter vault

I've got a very small sinkhole that has developed between my driveway and my water meter vault/box. The hole is about 20 inches deep and has actually eroded the soil deep enough that it goes ...
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0answers
56 views

Outside vents for drainage - name?

Right outside of my house there are vents (for sewage?) that look like this: These are ugly, take up space and a trip hazard. These can be easily pulled out (I just did with my hands) and below them ...
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1answer
85 views

Laying bricks over old concrete sidewalks

I just moved into an old house. The previous homeowner had concrete slabs as the sidewalks that are in touch with the house wall. From what I know, the concrete slabs not only provide a flat solid ...
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0answers
68 views

How to determine the location of the clogged spot in floor drain using a powered drain auger, and auger tip suggestion?

I have a basement floor drain that clogs and backs up a bit (but do slowly drain all the water). I used a powered auger attempting to clear it but without total success (it drains better but not as ...
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0answers
201 views

Water pooling against the garage, limited drainage options

I have a single family home in the city in MN. My detached garage abuts the alley, and I have a concrete slab next to it that spans the rest of my small property line (basically the back of my ...
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605 views

Building Concrete patio against the house with sunken family room for proper drainage

Just acquired this house with challenging problems. When the house was built, the builder didn't care for grading the lot appropriately. One of the rooms in the back of the house is below grade and ...
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1answer
605 views

Standing water in front of retaining wall okay for wall?

I built a retaining wall this past summer, and put the proper drainage behind the wall. Due to time, I never got around to handling drainage in front of the wall and in between the pool. The ...
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2answers
233 views

How to reattach detached cable onto a drain hand auger?

I have this drain hand auger, But the cable is detached when I extend it out for cleaning, now I don't know how to attach and wind it back onto the device, I also can't find any manual or tutorial ...
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161 views

How to determine which size of auger to get for backed up basement floor drain?

My basement floor drain is backing up water (~10L) when washer is dispensing water during the spin cycle. It's an older house at 1955. The drain looks like it has a p-trap. I wonder how can I ...
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2answers
284 views

Basement floor drain back up, 1/2" snake failed, what next?

The basement floor drain is having backup after the wash cycle from the washer, it doesn't backup from other water usage. I had a plumber came in to power snake with 1/2" tip (and few other tips) ...
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42 views

Is there a sealant I can use on concrete grouting with concrete pipes?

The driveway at our new house crosses over a creek, which requires 3 concrete culverts, about 16' long and 30" in diameter. The culverts are each made of two pipes with a joint in the middle. ...
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70 views

Drainage pipe in ground

I just discovered that my 2 inch PVC drainage pipe output was buried at about 6 inches below my front lawn. I tried to make a makeshift 1 inch trench to help the water flow out. The problem is that my ...
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1answer
384 views

Drainage downhill under slab with block retaining wall

I would like to install an allan block retaining wall (3' at its highest). I'm going to build a shop 25' downhill from this retaining wall, and want to have a poured slab for parking vehicles on. In ...
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0answers
995 views

Where to lead french drain end in backyard, cookie cutter neighborhood

I am going to install a french drain to alleviate some of the soggy muddy areas after rain. First, my backyard slopes and graded to drain to the rear left of backyard. There is a small valley to ...
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525 views

DIY Crawl Space Drainage and Encapsulation

Our house is in western Washington and during the winter we get a lot water in the crawl space. I'd like to tackle installing a drainage system – probably with a sump pump – and then encapsulate the ...
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0answers
1k views

How to fix the slant of bathroom floor

This is a follow up question to How long does caulk need to dry in a 1" gap? Some additional background information is that this is in China and bathrooms are not designed for contained bathtubs/...
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378 views

How to fill soil void along basement wall?

The previous homeowners did not keep up with the downspouts and some erosion occurred. All of the drains to the street are great and I have reconnected the downspouts to the drain pipes; some were ...
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1answer
334 views

Collapsing wooden basement walkout

The issue: We bought a house, built around 1985, but it has this extremely poorly built walkout from the basement. It looks like the builder's "solution" for drainage was a bent piece of tin ...
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0answers
1k views

Standing Water on French Drain

What could be causing standing water on top of a new yard french drain? I am working on a french drain solution in my backyard. I just finished covering the last section up yesterday and it started ...
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0answers
44 views

Is this foundation properly supported against rotation in an earthquake?

This foundation was built 1938, and seems unusually tippy even for the time. This is in an earthquake zone, the garage has a second floor above, and the given wall is shearwalled and bolted, with ...
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0answers
136 views

Is it Okay to Snake Underground Line that has a Shielded Fernco Coupling?

I need to tie-in a pvc pipe to an existing 4 in. pvc drain pipe. I plan to use a shielded fernco coupling. Is it okay to snake a pipe that has a fernco coupling? Will the snake tear up the fernco? The ...
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0answers
275 views

Sprinkler Box Drainage

Photos & more explanation here: Sprinkler System Album Installed Box w/ Description I recently paid a lawncare company to move my sprinkler box ... I was busy with work, patio was being ...
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0answers
40 views

Solution for A/C Condensate Drain Line when it is not possible to drain it elsewhere? [duplicate]

I have a split A/C system in a room that runs on low 24 hours a day during Summer that unfortunately cannot be connected to any drain or pipe and which therefore requires a bucket to be used to ...
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0answers
2k views

How do I stop water from leaking through the bottom of my shed walls when it rains?

I have a shed that was built on a low foundation so that when it rains water builds up against it and water tends to flow in between the concrete and the bottom of the wall and now there's mold ...
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1answer
269 views

How do sub-surface drains (e.g. French drains) work?

Do sub-surface drains (e.g. French drains, rubble drains, etc.) require a uniform rise in the water table in order to work? Or can they catch and convey localized sub-surface water? For instance, let'...