Questions tagged [drainage]

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

53 questions with no upvoted or accepted answers
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Replace pop-up with flip sink drain covers?

I had my house replumbed to code and put new sink basins in with pop up wastes. But I find that the water drains slowly, and the brand I'm using breaks easily so that they don't click in and out. I've ...
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212 views

drainage problem from kitchen sink

My kitchen sink(double sink) backs up, there is no clog I have removed the trap, I have also removed the basement trap and snaked both ways. Now the bathroom sink will also backup at same time, so I ...
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1answer
53 views

Proper Procedures for Regrading Under a Deck?

We have been getting tons of water in our basement during downpours (not regular rainfalls). The water comes in where the deck is located. I ripped up some deck boards and found the soil underneath ...
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100 views

I live in NJ. Do I need a p-trap and vent on a washer drain line not going directly to the stack?

Here is my situation. As it sits now, my washer drains directly into the slop sink right next to it. I live in a split level and I am moving the washer & Dryer up one half level about 6 feet in ...
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38 views

No Drainage Around Concrete Basement Floor

This question/comment is in regards to the sump pump question I had yesterday. While digging the hole to set my new sump pump basin I realized that there was very little if any gravel under the actual ...
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148 views

How to redirect water pooling behind skylights

I have a pair of skylights in my roof that leak every time it rains. I've tried silicone and a roofing sealant along the edges.. still leaks. During the last storm heavy rain I went up to check it out ...
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106 views

Sealing Off Gravity Pipe from Crawl Space

I currently have a 6" clay pipe for eliminating water from my crawlspace. The pipe exits my crawlspace about a foot from a corner wall, travels 15', and opens to air in a ditch (for now). It is ...
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829 views

extra pit next to sump pump

I have a basement with a properly installed sump pump. I have another hole approximately 1 foot away from the sump hole cut to the same dimensions. There are at least 2 pipes that run into the unused ...
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102 views

Mystery: Water vanished from flooded basement with no floor drain

I live on a century old home whose unfinished basement got flooded this week. We had heavy rainfall which overwhelmed the city's storm sewer. At a certain point there were about two inches of water ...
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407 views

Pouring drainage channel right next to foundation, how to protect the foundation?

Ugh. How can I arrange details on this concrete pour, to not damage the foundation later? This is San Francisco Bay area (no freezing). The visible clay pipe is a high volume gravity drain from the ...
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115 views

Can I build a concave mortared-stone sidewalk that will also act as a drainage flume?

I recently had a landscaping company install a mortared-stone drainage flume on the interior of a retaining wall at my house: It looks great and works just as well. It naturally has me wondering ... ...
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35 views

outbuilding drain into dry well

Aside from code differences between jurisdictions, is it acceptable to tie an outbuilding floor drain into a dry well drainage system? The outbuilding does not have a water supply, the slope of the ...
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86 views

Is soil in an open rock spoon drain a blocker? Think we've got a cowboy job done

Being on a slope, our place has a lot of problems with surface water flooding. We've had a spoon drain installed along our upper boundary to redirect surface water away from the house. Here's a pic ...
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42 views

Changing drainage from washing machine

I have a new build house that has a drainage on the side of the house as shown in this video: https://www.youtube.com/watch?v=BU_-fnvqCOI I want to change this so that it does not drain on the side ...
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68 views

Drainage problem

I built a room to my existing house which created a pitch on the roofline. When it pours rain, the water pools under my window and seeps into my house. I have put up gutters and also a rain ...
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106 views

Hooking up drain in dishwasher

I have a 2 yr old Bosch dishwasher that does not drain into the sink drain but straight down into a pipe in the ceiling below. That pipe has the proper P trap etc and worked well for my previous ...
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81 views

Lowering the basement, water table 2 metre deep

My house is constructed on the side of a slope where the top of the slope is built the road. I'd like to dig out the basement which is not high enough to stand in mostly, and is just clay. As part ...
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What is a 'normal' time for water to completely drain out of a shower pan?

I installed a new shower with slimline tray. Now when I am showering there is a fair build up of water in the tray. Nothing major or overflowing, but not quite perfect. As a gauge, when I stop the ...
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42 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
57 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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28 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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28 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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34 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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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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312 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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280 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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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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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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200 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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602 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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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
383 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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993 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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524 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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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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377 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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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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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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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 ...