An electravalve inlet is the wall-mounted vacuum valve that feeds 120 volts to a hose-end power brush, and the replacement part rarely matches by looks alone. The name covers two hardware generations from Canplas’s Vaculine division, plus a separate NuTone product sharing the same name.
By the end, you’ll know which generation lives behind your cover plate, the central vacuum outlet options that fit it, the wire gauge your house needs, and which upgrade is worth the drywall damage.
Keynote: Electravalve Inlet
An electravalve inlet powers a direct-connect hose’s electric brush straight from the wall, splitting one plate into a 120-volt receptacle and a low-voltage trigger circuit. Canplas’s Vaculine division builds the current E-Box version; the original molded-plug design is discontinued and won’t accept it. It matters most to anyone replacing a broken cover plate sight unseen.
What Makes an ElectraValve Different From a Basic Inlet
An electravalve inlet carries full house current to the hose cuff, so an electric power brush spins the second the hose seats, with no extension cord dragged from room to room. Every other inlet type only carries the low-voltage signal that starts and stops suction.
What Is an ElectraValve Inlet and Do You Have One?
Look for two small pin holes above the main hose port, spaced roughly 3/8 inch apart, and you’re looking at an electravalve inlet, not a basic one. Those two holes carry 120 volts to the hose’s metal cuff bands, which is why the connection is called direct connect. A basic inlet only has the two low-voltage contacts inside the hose opening and no separate power holes at all.
The Vaculine electric inlet valves manufactured by Canplas fit a 1.5 inch hose cuff, the industry standard, and cross-fit systems branded Beam, NuTone, Electrolux, Vacuflo, Kenmore, and Eureka. Buying a used or salvaged hose calls for one extra step: check cross-brand compatibility first, since a handful of older Sears and Kenmore installations used a non-standard bore that needs an adapter.
One Valve, Two Voltages Working Together
One plate runs two circuits at once: a low-voltage loop that wakes the power unit, and a 120-volt line that spins the brush. Air watts measure a vacuum’s sealed suction power at the hose end under load, and that number lives entirely on the power unit side, not the inlet.
An electric powerhead draws between 1.2 and 2.5 amps once spinning, pulled straight through those two pin holes instead of a cord in a nearby outlet. That’s the whole advantage over a pigtail hose: no cord, no outlet hunting, no tripping hazard across the hallway.
Why Canada Keeps Showing Up on the Box
Vaculine, the Canplas Industries Ltd. division based in Barrie, Ontario, molds every current electravalve inlet, not the vacuum brand printed on your power unit. Canplas builds the valve; Beam, NuTone, and the rest simply sell it under their own name on the cover plate.
The valves carry ETL approval, meaning an independent lab tested the electrical design against safety standards before shipping, and Vaculine markets them as made in North America from virgin resin. That matters on a part carrying house current inside a closed wall for twenty years without a service visit.
Ready to figure out which generation is actually behind your wall plate?
The Discontinuation Mess Dealers Gloss Over
The original ElectraValve is out of production, and the current E-Box ElectraValve won’t mate with its rough-in hardware, so a straight cover-plate swap is impossible on an older install.
Old ElectraValve vs. New E-Box: Not Interchangeable
Canplas discontinued the original molded-pigtail ElectraValve entirely, and nothing on the market revives that design. The E-Box version replaced it, and the two do not share a connector.
Order by looks alone, and the return shipping label writes itself. Check the back of your old cover plate first: a molded plug fused to the wire means old-style, a small connector block means E-Box.
What Actually Changed With the E-Box Design
| Original ElectraValve | E-Box ElectraValve | |
|---|---|---|
| Wire supply | Fixed 6 or 14-foot molded Romex from the factory | Field-supplied 12 or 14-gauge wire, any length |
| Connection | Molded plug snaps into finish plate only | Snap-in connector accepts stripped wire |
| Retrofit flexibility | Limited by the pre-molded cord length | Runs as far as the nearest branch circuit allows |
The fixed-length cord was the reason the E-Box exists at all. A power source sitting 20 feet past where the old 14-foot pigtail reached simply couldn’t connect. The E-Box ends that math problem for good.
Replacing an Old Cover Without Opening the Wall
Swapping a cracked old-style cover for a new E-Box face needs both the cover plate and the connector piece, sold together as a kit. Retail pricing for the combo rough-in and cover kit runs around $36.74 at major central vacuum parts retailers; confirm current pricing before ordering.
- Snip the old molded plug off the wire, leaving bare Romex exposed.
- Strip the wire ends and seat them into the new E-Box connector.
- Reconnect the two low-voltage screws exactly as they sat before.
- Snap the finished cover into the existing mounting plate.
No new holes, no fished wire, no electrician callback for this part of the job.
Worth checking before you order: is the wall plate branded ElectraValve at all, or something that only looks like it?
Wait, NuTone Sells an Electra-Valve Too?
Yes, and it’s a different product line entirely, built on its own rough-in kit that shares nothing with the Canplas ElectraValve except a similar name.
Canplas ElectraValve vs. NuTone Electra-Valve II
NuTone, now handled by DrainVac following its 2023 acquisition of the Broan-NuTone central vacuum line, sells the CI399 Electra-Valve II on the CI399RK rough-in kit, a separate design from Canplas’s Vaculine ElectraValve.
| Canplas ElectraValve | NuTone Electra-Valve II | |
|---|---|---|
| Current parts | E-Box ElectraValve, cover plus connector | CI399 inlet, CI399RK rough-in |
| Rough-in compatibility | Not compatible with the original ElectraValve | Original CI390 inlets do not fit the CI399RK |
| Current owner | Canplas Industries Ltd. (Vaculine) | DrainVac, via Broan-NuTone |
Neither family fits the other’s mounting hardware. A CI399 inlet has no home on an old Vaculine plate, and an E-Box cover won’t snap onto a CI399RK box.
Which Name Is on Your Wall Plate Right Now
Pop the door open and read the molded lettering before you shop anywhere. A homeowner cross-shopping “Electra-Valve” listings without checking that branding first is the most common way to end up buying a rough-in kit for a product they don’t own, then paying return shipping to fix the mistake.
ElectraValve or SuperValve: The Retrofit Decision
Pick based on the wiring method already sitting in your wall, since Hayden’s SuperValve uses a spliced J-box connection while the ElectraValve uses a snap-in connector, and the two never trade parts.
Why These Two Electric Valves Never Interchange
The SuperValve’s mounting plate contains a J-box, a wired junction box, where an electrician splices Romex to the cover plate wires with wire nuts. The ElectraValve’s plate skips the J-box; its connector snaps together with no splicing tool required. Both valves handle the same two jobs, but the physical connection method is built completely differently.
Installers Pick Sides, and Here’s Their Logic
New construction favors the SuperValve, since an electrician is already scheduled to run and splice wire before drywall goes up. Existing homes favor the ElectraValve, since the section of mounting plate nailed to a stud pulls free easily, and the snap connector needs no splicing skill once the wall is closed. One installer’s stated rule: SuperValve for new builds, ElectraValve for retrofits, every time.
The Wire Gauge Rule Most DIYers Miss
National Electrical Code requires the valve’s wire gauge to match the branch circuit feeding it: a 12-gauge circuit needs a 12-gauge ElectraValve, and a 14-gauge circuit needs the 14-gauge version. Mixing gauges fails inspection and creates a real fire risk at the splice point. A licensed electrician confirms your home’s circuit gauge in the time it takes to open the panel.
Not sure which side of that line your house falls on?
Installing One Without Regret
New construction lets the vacuum installer and electrician work independently on their own schedules. A retrofit into finished walls demands more planning around existing framing and circuit access.
New Construction: Let Two Trades Work Independently
The vacuum installer roughs in the mounting plate and pipe while framing is open. Weeks later, an electrician runs the circuit and snaps in the connector, no live wire touching the valve until that final step.
Retrofitting Into a Finished Wall
Cut the nail tab off the mounting plate before fishing it into a finished stud bay; that tab exists for new construction only. Feed the 120-volt supply from whichever branch circuit sits closest, since the E-Box design accepts field-cut wire at any length instead of the old fixed molded cord. That single change makes a modern retrofit realistic in a house where the original ElectraValve’s 14-foot pigtail would have come up short.
For photos of both rough-in styles side by side, see this guide on installing central vacuum electric inlet valves.
The Supply Specs That Keep It Safe
The 120-volt supply runs on a standard household branch circuit, and the valve’s wire gauge has to match it exactly, per the code rule above. This is not a DIY wiring job. A qualified electrician makes the branch circuit connection, full stop, and local code always overrides anything read on a forum thread.
When the Powerhead Dies but Suction Lives
Test power at the wall first. A dead brush paired with strong suction almost always points to the hose, not the electravalve inlet itself.
Testing Whether Your Inlet Still Has Power
Plug a power brush’s cord directly into the inlet’s contact holes, or check for 120 volts across those two holes with a voltmeter. Suction that runs fine while the brush stays dead confirms the inlet is delivering power and the hose is the actual failure point. Check for a tripped GFCI outlet feeding that circuit before assuming the worst.
The Hose Fails More Often Than the Valve
A worn contact band at the handle end, or a snapped internal 120-volt wire, mimics a dead inlet almost perfectly. Rotating the hose a quarter turn in the cuff sometimes revives a marginal contact long enough to confirm the diagnosis. A continuity check with a multimeter across the hose’s end pins settles it; a broken internal wire is not repairable.
Never Stick Anything in Those Small Holes
The two low-voltage contacts inside the hose opening are safe to test with a probe or a bent paperclip. The 3/8 inch spaced pin holes above them carry full 120-volt house current and are never safe to probe with anything improvised.
Suction still weak after all that? The hose was never the whole story on a long pipe run.
Should You Even Upgrade to Electric Inlets?
Not always. A basic low-voltage inlet paired with a pigtail-cord hose delivers the same cleaning power for a fraction of the electrical work.
The Upgrade Dealers Push and Walls Resist
Converting basic inlets to direct connect almost always means opening finished walls for new branch circuits, real drywall damage in a house that isn’t already gutted. A remodel with studs exposed is the one moment this upgrade costs nothing extra.
A Cheaper Path to Powered Cleaning
| Pigtail-cord hose | Full ElectraValve conversion | |
|---|---|---|
| Wiring required | None, plugs into any nearby outlet | New branch circuit to each inlet |
| Wall disruption | Zero | Opens finished walls at every inlet |
| Typical cost | Cost of the hose only | Hose, plus electrician, plus valve hardware |
A dual-voltage hose with an 8-foot pigtail plugs into any outlet within reach and runs the same power brush a direct-connect system would. It’s the same problem the WallyFlex automatic hose inlet crowd solves from a different angle: skip the wiring complexity, keep the cleaning power.
Matching Inlet Count to Real Cleaning Reach
Think of hose reach the way you’d think about sprinkler coverage, not square footage. A 30 to 35 foot hose covers most of a floor from a single, well-placed inlet, and one electric inlet per floor beats four basic ones scattered without a plan.
Buying the Right Part the First Time
Photograph the open valve, confirm the wire gauge already in the wall, and match the exact generation before adding anything to a cart.
The Three-Step Identification Before Checkout
- Open the door and photograph the valve, inside and out, before searching any store.
- Confirm whether it’s E-Box, original ElectraValve, or NuTone’s CI399, by the connector style.
- Confirm the house wire gauge feeding it, 12 or 14, before ordering a rough-in kit.
Skip any one of those three steps, and the odds of a wrong-part return climb fast.
Where Genuine Canplas Parts Actually Ship From
Specialty central vacuum retailers stock current E-Box kits; big box hardware stores rarely carry electric inlet valves at all. Pair the new valve with matching inlet cover plates in the same finish as the rest of the house, since color runs shift between manufacturing batches.
Conclusion
You arrived worried a broken cover plate meant fishing new wire through a finished wall. It doesn’t, provided the generation and wire gauge match before you order. Tonight, open the door, photograph what’s inside, and write down every molded number you find. That cover plate protects a piped system built to outlast every portable vacuum you’ll ever drag out of a closet.
Frequently Asked Questions
What is an ElectraValve inlet and how is it different from a regular central vacuum inlet?
An ElectraValve inlet carries 120 volts to the hose cuff so an electric power brush runs without a cord. A standard low-voltage inlet only switches suction on and off and never powers a brush motor directly.
How do I know if I have the old ElectraValve or the new E-Box ElectraValve?
Check the wire connection behind the open door. A molded plug fused permanently to the wire means the discontinued original, and a small snap-in connector block means the current E-Box version. The two are not interchangeable.
Can I replace just the cover plate on my old ElectraValve?
No, not with a new E-Box cover alone. You need the E-Box connector too, plus a few minutes snipping the old molded plug and stripping the wire to seat it in the new connector.
What is the difference between an ElectraValve and a Hayden SuperValve?
The wiring method is the difference. A SuperValve splices to Romex with wire nuts inside a J-box; an ElectraValve snaps a connector together with no splicing. Neither valve’s cover plate fits the other’s mounting plate.
Do I need an electrician to replace an electric central vacuum inlet?
Yes, for the 120-volt branch circuit connection. The low-voltage side and cover-plate swap are homeowner-friendly, but running or splicing house current to the valve is an electrician’s job, and code requires the wire gauge to match your home’s existing circuit.