# Rain chains vs downspouts

> Rain chains vs downspouts in Kent's long wet season: how much water each carries, splash and wind, where a chain works and where only a downspout will do.

URL: https://guttersofkent.com/guide/rain-chains-vs-downspouts/

A rain chain turns roof water into something to watch. It also carries far less water than a downspout and splashes more, so the question is which corner of the house can live with that through a Kent winter.

Short answer

A downspout carries more water, more quietly and with less splash than a rain chain, so it is the right choice for main roof areas. A rain chain suits a small, low-flow roof such as a porch, entry or garden building, where some splash is acceptable and the base is set up to catch it. In Kent the same discharge rules apply to both.

Key takeaways

- Downspouts enclose the water; rain chains guide it on the outside, so heavy flow sheds off and splashes.

- Cup-style chains carry more than open-link chains, but neither matches an enclosed downspout.

- Kent's long, steady wet season means a chain runs for weeks at a time, so splash and erosion at its base add up.

- Chains fit small roof areas: porches, entries, sheds and garden buildings.

- A chain's base still has to send water away from the foundation, never to the sanitary sewer.

## The short answer

A downspout is a closed pipe; a rain chain is an open guide. [Gutters of Kent](https://guttersofkent.com/) installs [downspouts](https://guttersofkent.com/downspouts/) and gutter systems across Kent and South King County, with the work done by licensed and insured contractors, and the main question when a homeowner asks about rain chains vs downspouts is how much roof drains to the outlet in question. A chain works where that area is small and some splash is acceptable. Everywhere else, a downspout carries the water.

## How each one moves water

A downspout encloses the stream from the gutter outlet to the ground. Water cannot escape sideways, wind cannot push it, and the bottom elbow hands it to an extension or a splash block in a controlled direction.

A rain chain relies on water clinging to the links or cups as it falls. In light rain, that works well: the water runs down the chain in a visible ribbon. As flow increases, the chain cannot hold it all. Water sheds off the sides, sprays from the cups and falls free, landing in a wider circle around the base. Cup-style chains, with a series of open cups, handle more flow than open-link chains because each cup catches and redirects water, but they still have a lower ceiling than an enclosed pipe.

| Question | Downspout | Rain chain |
| --- | --- | --- |
| Water carried | Full capacity of its size, 2x3 or 3x4 and up | Light to moderate flow; sheds and splashes as flow rises |
| Splash | Contained to the discharge point | Spray around the chain and the base, more in heavy rain |
| Wind | No effect on the water inside | Pushes the stream and swings an unanchored chain |
| Debris | Can clog at elbows | Fewer hidden clog points; cups collect needles |
| Noise | Quiet when clear | Quiet trickle; in heavy rain, spatter at the base |
| Best fit | Any roof area, main eaves, valleys | Porches, entries, sheds, small garden buildings |

## Kent’s wet season decides most of it

The deciding factor here is not the biggest storm but the length of the season. NOAA’s 1991 to 2020 normals for the Kent station show 40.09 inches of precipitation a year, with October averaging 4.07 inches, November 6.23, December 5.75 and January 5.77. The station averages 96.7 days a year with at least a tenth of an inch and 6.6 days with an inch or more.

For a downspout, that pattern mostly means keeping outlets clear. For a rain chain, it means weeks of steady flow and a few days a year when it is overwhelmed. The splash that looks charming in a summer shower lands on the same patch of siding, the same foundation corner and the same bed of soil for months. Where the chain hangs close to the wall, that water reaches the siding and the ground right against the house, which is exactly where a gutter system is meant to keep it away from. The [guide to gutters and basement water](https://guttersofkent.com/guide/do-gutters-prevent-basement-water/) explains why that patch of soil matters.

Wind adds to it. Fall and winter storms push the falling stream sideways, and an unanchored chain swings against siding, windows or a porch post. Snow is light and infrequent here, with NOAA normals for SeaTac showing about 6.3 inches a year, but ice can coat a chain during an occasional freeze and add weight to the gutter outlet it hangs from.

## Where rain chains work

A rain chain earns its place where the roof area is small and the setting makes the extra splash acceptable:

- **Porch and entry roofs.** A short porch roof sends little water, and the chain becomes a feature beside the steps instead of a pipe on a post.

- **Garden buildings and sheds.** Small roofs, often away from the main house, where splash lands in a planted area. [Garage and shed gutters](https://guttersofkent.com/garage-and-shed-gutters/) covers the gutters that feed them.

- **Short runs over a patio or courtyard.** Where a basin or rock bed can take the flow and slope it away from the house.

The roof area matters more than the setting. A porch that also collects water from a valley or an upper roof sends more water than its size suggests, and a chain under that outlet overflows. The [how many downspouts guide](https://guttersofkent.com/guide/how-many-downspouts-do-i-need/) explains how to work out what each outlet receives.

## Where a downspout is the only fit

Main roof eaves, long runs, any outlet below a valley, two-story walls and the corners above a basement all call for a downspout. These outlets carry most of the roof, and a chain there would shed water against the house through much of the wet season. Where trees overhang, [gutter guards](https://guttersofkent.com/gutter-guards/) reduce what reaches the outlet, and a downspout sized at 3x4 is harder to block than a 2x3, and the [downspout sizes guide](https://guttersofkent.com/guide/downspout-sizes/) compares them.

A mixed approach is common sense on many houses: downspouts on the main roof, a chain on the porch where people see it. The two are installed the same way at the top, from a gutter outlet, so the choice can be made outlet by outlet.

## Setting up a rain chain properly

If a chain fits, the details decide whether it behaves:

- **At the top.** The chain hangs from the gutter outlet, usually on a bar or hanger across the opening. The outlet needs to be large enough for the flow and clear of the downspout tube that would otherwise be there.

- **At the bottom.** Anchor the end to a stake, ground anchor or weighted basin so wind cannot swing it, and set a gravel basin or rock bed to break the fall and hold splash.

- **Away from the wall.** Hang the chain where the porch or eave holds it a hand’s width or more off the siding, so spray lands on the basin, not the wall.

- **The water’s next step.** The basin needs a way to send water onward, across ground that falls away from the house.

## Discharge rules still apply

A chain changes how the water reaches the ground, not where it is allowed to go. Kent City Code 7.04.180 bars roof runoff from the sanitary sewer. Under the King County manual Kent adopts, a splash block serves no more than 700 square feet of roof and needs a vegetated flowpath of at least 50 feet, and dispersion is not used near steep slopes or landslide hazard areas, or on slopes over 15%, without geotechnical approval. A chain’s basin is subject to the same logic: it should hand the water to ground that carries it away. The [guide to where downspouts should drain](https://guttersofkent.com/guide/where-should-downspouts-drain/) covers each option, and [downspout extensions](https://guttersofkent.com/downspout-extensions/) explains above-ground routing for the downspouts that carry the rest of the roof.

Rain chains themselves are a homeowner add-on rather than a listed service. The downspouts that carry the main runs, and where they discharge, are planned on the walk-around; [Get an Estimate](https://guttersofkent.com/contact/) for that part.

Questions about your own house? Call [(253) 352-5321](tel:+12533525321) or get an estimate.

## More questions on this topic

### Do rain chains work with fir needles and leaves?

Debris passes a chain more easily than it passes a downspout elbow, because there is no enclosed bend to catch on, but cup-style chains collect needles in the cups and the gutter outlet above can still clog. Where trees overhang, a strainer or guard at the outlet and a basin that is easy to rake out help.

### How should the bottom of a rain chain be anchored?

Fix the bottom so wind cannot swing the chain against siding or windows. A stake, a ground anchor or a weighted basin holds the end taut, and a gravel-filled basin or a shallow bed of river rock breaks the fall, absorbs splash and gives the water a place to spread before it moves away from the house.

### Can I replace an existing downspout with a rain chain?

Only where the roof area draining to that outlet is small. A downspout serving a long eave or a valley sends more water than a chain can guide, and the overflow would spill at the wall. Swapping the downspout on a porch roof or a short run over an entry is the more realistic case.

## Keep reading

[How many downspouts do I need? Read the guide](https://guttersofkent.com/guide/how-many-downspouts-do-i-need/)[Where should downspouts drain? Read the guide](https://guttersofkent.com/guide/where-should-downspouts-drain/)[Underground downspout drains: when to bury the line Read the guide](https://guttersofkent.com/guide/underground-downspout-drains/)[Do gutters prevent basement water? Read the guide](https://guttersofkent.com/guide/do-gutters-prevent-basement-water/)[Downspout sizes: 2x3 vs 3x4 downspouts, larger and round Read the guide](https://guttersofkent.com/guide/downspout-sizes/)