How To Avoid Smashed Underground Gutter Drains

Tips

Underground gutter drains are one of those things that can go very wrong, very fast if the wrong materials are used. We learned this the hard way when our gutters started backing up and found a completely smashed section of pipe once we dug it up.

It turns out the lot had been graded after the drainage was installed, and the heavy equipment had crushed the pipe. Not all gutter drains are created equal!

Here’s what you need to know about the three most common types of underground drainage pipe:

1. Corrugated Pipe

This is the black flexible pipe you see at most hardware stores. It’s easy to use, bends around corners, and doesn’t cost much. That’s probably why it was used for our home.

But here’s the problem. The inside is ribbed, which means debris can get caught easily and start to build up. Over time, those clogs can slow the water or block it completely. And because the pipe is flexible, it’s also weak. Once it gets crushed, it’s game over.

Snaking it or flushing it with a jetter doesn’t work well either, because the ridges catch the tools just like they catch the leaves. If you want something quick and cheap, corrugated might work. But if you’re building your forever home, this is not the pipe to rely on.

Corrugated Pipe Drain via DIY Stack Exchange

2. PVC Pipe

PVC is the thick, white pipe most people know from indoor plumbing. But it’s also an amazing option for underground drains.

The smooth interior helps water flow freely and keeps debris from sticking. Even if something does clog it, a drain snake or pressure washer can usually clear it right out. Plus, it’s super strong. It won’t collapse under heavy weight, which makes it a great option if the pipe runs under a driveway or through high-traffic areas.

It does take more work to install. The pieces need to be glued together and you’ll need clean, straight trenches. But if you're thinking long-term, PVC is one of the best choices you can make.

PVC Pipe Drains via Beyond Wow Plumbing

3. SDR35 Pipe

If you want something better than corrugated but don’t need the full strength of PVC, SDR35 might be the right choice. It’s the green pipe that a lot of pros use for yard drainage.

It’s smooth on the inside, just like PVC, and connects with gasketed fittings, so you don’t have to glue it. It’s not quite as strong as PVC, but it holds up well in most residential builds. Maybe avoid putting it under your driveway unless it’s buried deep!

SDR35 Pipe Drainage via Dresen Landscaping

Plan Ahead So You Don't Have to Dig Later

We had to dig up and replace our smashed corrugated pipes, and it’s not something we ever want to do again. If you’re building a home, now’s the time to ask your builder what kind of underground drainage pipe they’re using.

If it’s corrugated, ask for an upgrade to PVC or SDR35 if you can swing it. It’s a small change that can save you a ton of hassle down the road.

Looking for more tips like this? Grab The Ultimate Home Building Checklist so you don’t miss a single detail during your new build.