Questions tagged [drainage]

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

54 questions with no upvoted or accepted answers
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106 views

Connect 110mm pvc to clay oblique junction

I want to install a toilet and replace the existing 60mm cast iron pipe with 110mm pvc It looks as if the cast iron has been cemented into the clay pipe junction I’m trying to avoid replacing the ...
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1k views

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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206 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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69 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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35 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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122 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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0answers
99 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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0answers
756 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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0answers
95 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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354 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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105 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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2answers
68 views

Drainage fix: Flat concrete slab up over my vinyl siding by 2 inches. Is this acceptable?

I am a new home owner. The concrete on my front porch sloped towards the house so every time it rained water drained between the porch and the house. Last week after 8 months the builder took out ...
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34 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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82 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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0answers
38 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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67 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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0answers
102 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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79 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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1k views

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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1answer
66 views

My mini fridge had a frosty back wall, so I turned it off for 24 hours. There was water on the floor through the back of the fridge, why it happened?

I know that there is a drain hole, and then that water is drained through it and then evaporated by the evaporator, and when the fridge does not work - nothing will evaporate the water. So does the ...
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1answer
31 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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21 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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33 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
36 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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0answers
11 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
53 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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22 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
22 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
35 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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0answers
28 views

Montgomery Ward window a/c drain clogged

I've got a really old Montgomery Ward A/C unit, model: VWE-5156A that seems to have it's internal drain clogged up. It works really well, (we were all shocked when it kicked on and worked like a ...
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0answers
228 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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0answers
212 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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2answers
616 views

How can I prevent this ice build up on my driveway/walkway?

My house faces North. I have down spouts on all four corners of the house. My challenge is that in the late winter/ early spring, the sun melts the snow off the roof and comes down the downspouts. ...
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0answers
61 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
147 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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0answers
551 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
204 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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128 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
258 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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0answers
118 views

My shower doesn't drain well in the first few minutes

When I take a shower the water doesn't drain well in the first few minutes. After about three to five minutes there's a few bubbling sounds from other drains, and then the shower drain works perfectly ...
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41 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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0answers
68 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
317 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
938 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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0answers
499 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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0answers
317 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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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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43 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 ...