If your house is already built, already finished, already lived-in — and you want a wired network connection somewhere that doesn’t currently have one — you have three real options. You can pull new Ethernet, you can piggyback on the existing coax with MoCA, or you can use powerline adapters over the house wiring.
They are dramatically different in real-world performance. Two of them are excellent. One of them is the thing we end up replacing for customers constantly. Here’s the practical breakdown.
Option 1: Pull new Ethernet — always best if you can
Ethernet is the benchmark. Every other option is measured against it. Pulling a new Cat6 cable from the network closet to wherever you need a wired connection gives you full-speed, low-latency, zero-drama connectivity that will outlast the house.
The reasons people don’t do it:
- Drywall is already up — walls have to be cut and patched, or cable has to be surface-run
- Multi-story runs require fishing through framing, often blocked by fire-stops or insulation
- Concrete slab between floors (rare in Utah but exists) makes vertical runs genuinely very hard
- Renters can’t modify walls
- Cost perception — people assume pulling a new run is $1,000+ when in an accessible attic it’s often $150–350
Most Utah homes have accessible attics. If the destination is upstairs or on the main floor and the rack is in the basement, vertical runs in interior wall cavities, HVAC chases, or from the attic down can often be done without drywall work. In a finished basement to a main-floor location, a single hole near the TV and a fished run behind the wall plate can give you a proper Ethernet drop in an hour.
For the scenarios where pulling cable genuinely isn’t practical — concrete-block construction, HOA-restricted exteriors, rentals, historic homes — the other two options enter the conversation.
If you are building new or remodeling, run the Cat6 now. We covered the full room-by-room approach in the new construction pre-wire checklist and in the article on Cat5e vs Cat6 vs Cat6A cable categories.
Option 2: MoCA — the quiet workhorse
MoCA stands for Multimedia over Coax Alliance. It’s a standard that pipes Ethernet over the existing RG6 coax cable in your walls. Most Utah homes built in the last 25 years were wired with coax to every bedroom and living room for cable TV or satellite. That coax is mostly unused in 2026, and it turns out to be excellent Ethernet infrastructure.
How it works
You put a MoCA adapter at each end of an existing coax run. One adapter near the router, one at the remote room. The adapter has an Ethernet port on one side and a coax port on the other. You plug Ethernet into the router, coax into the wall jack — and now the wall jack at the other end of the house delivers usable Ethernet.
MoCA uses RF frequencies above the ones TV uses, so it coexists with cable TV or cable internet on the same coax without interference. For most homes where coax is sitting idle, MoCA just uses it.
Real-world performance
- MoCA 2.5: 2.5 Gbps total shared across adapters, real-world 1.5–2.0 Gbps per link
- MoCA 3.0: up to 10 Gbps, still rolling out as of 2026
- Latency: 3–6 ms added on top of Ethernet — barely noticeable
- Jitter: consistently low; video calls and gaming feel the same as wired
MoCA 2.5 is easily enough to deliver gig fiber speed to a remote room. MoCA 3.0 is overkill for almost any residential use.
When MoCA is the right answer
- The destination room already has a coax jack (most bedrooms, living rooms, and finished basements)
- The coax run goes back to a central location (look for a splitter near the main demarc or in the basement)
- You can’t fish Ethernet but you can tap the existing coax
- You need solid backhaul for a wired Wi-Fi AP in a remote room
The gotchas
- Splitters matter. Cheap splitters only pass TV frequencies. You need a MoCA-compatible splitter (rated 5–1675 MHz or 5–2300 MHz) anywhere the coax branches.
- PoE filter on the incoming cable line. If you have cable internet, a PoE (Point of Entry) MoCA filter at the house demarc keeps your MoCA signal inside your house and prevents interference with the ISP or your neighbors’ MoCA networks.
- Every coax jack needs to be accessible.If a previous owner capped off the coax at the wall or cut it behind the drywall, MoCA can’t help you.
- Adapters need to match. Don’t mix MoCA 2.0 and 2.5 adapters — the whole network drops to the lowest version.
Cost
A pair of MoCA 2.5 adapters runs about $150–220. A good MoCA-compatible splitter is $15. A PoE filter is $10. For under $250, a single coax run becomes a usable 1.5–2 Gbps wired link — often better than your Wi-Fi.
Option 3: Powerline — the one we replace most often
Powerline adapters use the house’s electrical wiring as a network medium. You plug one adapter into an outlet near the router, another into an outlet near the destination, and Ethernet flows over the 120V wiring between them.
This sounds elegant. In practice, it’s unreliable on a scale that we genuinely cannot overstate.
Why powerline disappoints
- Rated vs actual speeds differ wildly. “AV2000” adapters advertise 2 Gbps. Real throughput between two outlets on the same circuit is usually 100–300 Mbps; between outlets on different breakers it’s often 30–100 Mbps or nothing.
- Every appliance is noise. Your HVAC compressor, dishwasher, EV charger, LED dimmer, or fluorescent ballast adds electrical noise that degrades the powerline signal. A link that works fine at 2 AM can collapse at dinner time.
- Different phases break the network. US residential panels split loads across two 120V phases. If the router outlet is on phase A and the destination outlet is on phase B, signal has to jump phases at the panel — you might lose 80% of throughput or never connect at all.
- Surge protectors and UPSes kill it. Plugging a powerline adapter into a surge protector filters out the MoCA-like high-frequency signal the adapter depends on. Most “it doesn’t work” tickets trace back to this.
- GFCI and AFCI breakers filter it too. Modern electrical code requires AFCI on most residential circuits. Powerline signal through AFCI breakers is often attenuated or blocked entirely.
- Latency and jitter are bad. Even when bandwidth is usable, latency varies enough to make video calls and gaming feel off.
When powerline is the right answer
Genuinely: almost never. The cases where it’s the correct call:
- Temporary setup where you need a wired drop for a week
- Rental where landlord won’t allow any cable work and there’s no coax either
- A specific device (printer, IoT hub) where any wired connection is better than Wi-Fi and performance doesn’t matter
If either of the other two options is available, use them. We routinely replace powerline adapters with MoCA when coax is available, and it’s one of the single biggest performance jumps a homeowner can experience.
The side-by-side
Real Ethernet (Cat6)
- Speed: 1 Gbps or 2.5 Gbps standard, 10 Gbps on Cat6A
- Latency: sub-1 ms
- Reliability: effectively perfect
- Cost per drop: $150–350 retrofit, $50–150 pre-wire
- Best for: everything, if you can run it
MoCA 2.5
- Speed: 1.5–2 Gbps real-world
- Latency: 3–6 ms added
- Reliability: very high if splitters/filters are right
- Cost: ~$200 per pair of adapters
- Best for: retrofit homes with existing coax
Powerline (AV2000)
- Speed: 30–300 Mbps real-world, highly variable
- Latency: variable, often 10–40 ms
- Reliability: poor; sensitive to electrical conditions
- Cost: $80–150 per pair
- Best for: temporary or rental-only scenarios
What we do when a Utah homeowner calls
Our typical troubleshooting order when someone calls about a dead room in a finished house:
- Check the attic — 80% of the time we can pull actual Ethernet from the rack to a main-floor or upstairs location through an accessible attic. This is always the first option we try.
- If pulling is impractical, check for coax in the destination room and trace it back to a central splitter. If the coax run is intact, MoCA 2.5 is usually deployable in under an hour.
- If the destination is an AP location, a wired MoCA backhaul is dramatically better than relying on wireless mesh — we covered the mesh backhaul problem in depth separately.
- Powerline is a last resort, and only for non-critical devices. If the only thing in the room is a printer, a smart speaker, and a thermostat, powerline is fine.
For a finished basement specifically, MoCA is often the cleanest retrofit because basement TV locations almost always have coax from the original cable/ satellite install. The basement and ADU Wi-Fi coverage post goes into AP placement in more detail.
What about 2.5/5/10 Gig fiber in-wall?
Fiber is overkill for nearly every interior house run. It shines for detached structures, ADUs, and workshops where the distance exceeds Ethernet’s 100-meter limit, or where you want galvanic isolation between buildings (lightning and ground-loop protection). For inside-the-house runs under 100 meters, Cat6 or Cat6A is the right cable.
Bottom line
Wired is better than wireless, full stop. If you can pull Ethernet, pull Ethernet. If you can’t, MoCA over existing coax is the next-best thing and it’s genuinely excellent in 2026. Powerline is the option of last resort — it works occasionally, fails frequently, and is the thing we replace most often when customers upgrade.
In a typical 4,000 sq ft Utah home with an accessible attic and intact coax, a combination of pulled Ethernet and MoCA can give you reliable wired drops in every room that needs one, usually in a day, without any drywall patching.
Keystone Integration retrofits wired networks in Sandy, Cottonwood Heights, Holladay, and across the Wasatch Front — combining new Ethernet runs, MoCA over existing coax, and ceiling-mounted APs to get real Wi-Fi and wired connectivity into finished homes without tearing up drywall. See our full service list, or reach out for a free site survey.