Downpipes are a crucial element of the guttering system as they allow rainwater to be efficiently transported from the gutters into an underground drainage system. Much like our guttering systems, we offer many different types of gutter downpipes in order to suit a wide variety of applications. So whether you're looking for a plastic downpipe for a home replacement job or a cast iron downpipe for a heritage-style property, we're confident that we'll have an option for you!

Why are gutter downpipes so important?

Without proper downpipes, gutters can overflow and cause water damage to your home's walls and foundation. Guttering downpipes act as the exit route for collected rainwater to be redirected away from the house into a drainage system.

The positioning of downpipes is important - they need to be placed at an endpoint of the guttering so that water doesn't pool. The size of the downpipe should match the size of the gutters to allow for optimal water flow.

Ideally, gutter downpipes carry rainwater into a drain system or collection tank. Having the base of the downpipe positioned over a drain grate, gravel bed or collection system prevents puddling around the foundation. Rainwater that is collected into a water butt or other rainwater harvesting system can have many uses such as plant watering or vehicle washing.

How are downpipes connected to the guttering?

Downpipes are most often connected to the guttering system via a running outlet, which is a small gutter fitting in the shape of the gutter profile that features a downpipe connector on the bottom. For plastic downpipes, it is as simple as slotting the pipe into the outlet and twisting it upwards until the fit is secure. Other materials such as cast iron can be a bit more complex, be sure to consult the installation guides for your material of choice for more information.

The material of the guttering downpipe also affects functionality. Metal like aluminium or cast iron have a smooth interior surface which improves water flow. PVC is lightweight but can be prone to getting clogged by debris. There are products available to assist with rainwater flow, particularly in the case of plastic downpipes, balloon guards are commonly used as well as standard eaves protection components.

When shopping for downpipes, consider the typical rainfall amount in your area, gutter size and roof area when choosing the right downpipe for your home. Downpipes that are too small can bottleneck and back up your gutters.

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