Future-proof your home theater wiring by running a flexible conduit inside walls during construction or renovation. This allows you to easily pull new cables without damaging drywall as new standards emerge. This method ensures your setup can accommodate future HDMI and Ethernet upgrades.
The trade nickname for electrical nonmetallic tubing, or ENT, is Smurf tube. It is a bendable, blue plastic raceway typically sold in coils at Home Depot in 1/2, 3/4, and 1-inch diameters. You can pull current Cat6A Ethernet cables through it today and later replace them with future Ultra96 HDMI or fiber optic cables without opening your walls again.
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The Future-Proofing Power of Smurf Tube
You can future-proof your home theater wiring by installing a flexible conduit, commonly known as Smurf tube, within your walls during construction or renovation. This allows for easy replacement or addition of cables as new technologies develop, saving you from future drywall repairs.
Smurf tube is the trade nickname for electrical nonmetallic tubing (ENT). It is a bendable plastic raceway, often bright blue, available in 1/2, 3/4, and 1-inch sizes.
You can pull Cat6A Ethernet cables through it now, and in a few years, replace them with Ultra96 HDMI or fiber optic cables through the same channel without further wall access.
Because the author has a ranch-style home, a single length of Smurf tube can reach the entire main floor from the basement. This allows new cables to be fed up into the attic and then dropped down interior walls to nearly any room, making the most of the installed conduit.
Running Smurf tube during construction simplifies future upgrades. The author learned this while finishing a basement and regrets not running more of it. It provides a protected pathway for new wiring, turning future cable needs into simple pulls rather than extensive renovations.
Choosing the Right Conduit and Cables
New Ultra96 HDMI cables double bandwidth to 96Gbps, but they require a specific cable designed for this speed, as older cables cannot transmit the signal. Ethernet has seen multiple upgrades, from Cat5 to Cat5e, Cat6, Cat6A, and now Cat8, each requiring a physical cable swap for those seeking peak performance.
The category printed on an Ethernet cable’s jacket sets a hard limit on its speed. Even modern-looking ports can be limited to 100Mbps. Replacing a cable stapled inside a closed wall stud bay involves cutting drywall, patching, priming, and painting, with the cable itself being the least expensive part of the upgrade process.
For conduit, it is recommended to use 3/4-inch or 1-inch diameter tubing to allow bulky HDMI connectors to pass through bends. Half-inch conduit is sufficient for a single Cat run but becomes cramped with more cables. The corrugated interior of the tubing can catch a fish tape, making a pull string invaluable for routing cables.
While a 25-foot roll of 3/4-inch Smurf tube costs around $40, this is a small price compared to the cost and effort of opening a finished wall for repairs. Patching, sanding, priming, and repainting after a drywall cut can consume a weekend and still not perfectly match the original surface.
Installation and Connection Guide
When building or finishing a space, installing conduit is the most cost-effective upgrade with the longest shelf life. A length of blue Smurf tube and a pull string can outlast future cable standards, waiting for cables that have not yet been released.
The wire that changes most rapidly is located behind screens and at the network’s edge, making it the ideal place to establish a pull path. Behind a wall-mounted TV, a tube running from the display box to a baseplate allows you to easily connect whatever HDMI standard the next gaming console requires.
A run from your equipment rack up to an attic or central chase transforms future cable drops into a simple afternoon task instead of a significant renovation project.
An empty stub extending to an exterior soffit can turn a future camera installation into a quick pull, avoiding the need to fish cables blindly through finished drywall.
Always leave a pull string in every empty conduit. This minimal cost can save hours of frustration, turning a five-minute job into a prolonged struggle. While many new runs may remain open and simple, areas without shared walls are precisely where pre-installed conduit is most valuable.
Why Traditional HDMI and Ethernet Ports Are Becoming Obsolete
HDMI 2.2 was introduced at CES in January 2025 and finalized that summer, increasing bandwidth to 96Gbps but requiring new Ultra96 cables. Older cables cannot support this new standard, highlighting how quickly video interface technology advances.
Some TVs currently in use have ports that are limited to 100Mbps, regardless of their modern appearance. This illustrates that the physical wiring behind these ports can become a bottleneck, even if the port itself seems up-to-date.
Both HDMI and Ethernet standards are constantly evolving and will continue to do so. The history of these technologies shows a consistent pattern of advancement, making current infrastructure potentially obsolete as new versions are released.
Ethernet extenders can struggle to consistently deliver 4K resolution at 60 frames per second. Networking standards have progressed to offer speeds of up to 100Mbps, but this is a benchmark that is rapidly being surpassed by newer technologies designed for higher data throughput.
Frequently Asked Questions
What is Smurf tube?
Smurf tube is the trade nickname for electrical nonmetallic tubing (ENT). It is a flexible, typically blue plastic conduit sold in various sizes. Its primary benefit is providing an empty pathway within walls for future cable installations without requiring drywall removal.
How do I future-proof my home theater wiring?
You future-proof your home theater wiring by installing flexible conduit, such as Smurf tube, in your walls while they are open. This creates an accessible channel that allows you to easily pull new cables for future technology upgrades without cutting into finished walls.
What size conduit is best for HDMI and Ethernet?
For HDMI and Ethernet, it is best to use 3/4-inch or 1-inch Smurf tube. This size accommodates the bulkier connectors of HDMI cables and allows for multiple Ethernet cables or other data lines to be pulled through without excessive friction or difficulty.
Why are HDMI and Ethernet cables becoming obsolete?
HDMI and Ethernet standards are continuously updated, increasing bandwidth and capabilities. For instance, HDMI 2.2 requires new Ultra96 cables for its 96Gbps bandwidth. Similarly, Ethernet has evolved through multiple categories, making older cables unable to support the latest speeds and features.
How do I install Smurf tube?
Install Smurf tube by running lengths of the flexible plastic conduit through wall cavities, attics, or chases while the walls are open during construction or renovation. Ensure you leave a pull string inside the conduit; this will greatly assist in feeding new cables through it later.
