Espresso where plumbing isn't
A Boxer Tank that dies mid-event can't wait for next week. We repair Rocket's tank-fed compact wherever it works: float switches, reservoir gaskets, vibration pumps, boilers scaled by whatever water the venue offered. Faults on this machine are small, specific, and fixable on the spot when the right parts come along, so tell us the symptom when you call.
We'll get back to you today.
Thanks. We received your request.
A Grajqevci technician will get back to you today to confirm your machine and book the visit. If it's urgent, call us directly at (289) 217-3796.
Something went wrong sending your request.
Please try again, or call us directly at (289) 217-3796 and we'll book your service over the phone. You can also email support@grajqevci.com.
Rocket Espresso · Compact tank-fed heat-exchanger commercial espresso
The Boxer Tank is the Boxer built for places without plumbing: fill the reservoir and pull real espresso. An oversized 5 L copper HX boiler and a thermosiphon group give it proper commercial extraction at 50 to 120 cups a day, with a joystick wand for milk. Food trucks, event caterers, and kiosks run them, and some get converted to direct plumb later. From the service side the tank is the defining feature: reservoir seals, float switches, and uncontrolled source water decide how it ages.
Why Grajqevci
Call in the morning and a technician is usually on-site before the day is out. Most Rocket Espresso Boxer Tank jobs get diagnosed and fixed on the first visit.
Commercial coffee equipment is all we do, and Rocket Espresso Boxer Tank is one of the platforms we know best. Not a generalist guessing at a service manual. Genuine OEM parts, industry-standard procedures.
Flat rate for the visit, with parts billed separately. For bigger jobs you'll see a written quote on-site before we proceed.
Skip the wait
Trusted by Toronto's most demanding teams
Boxer Tank faults we diagnose
Tank operation creates its own fault patterns. These are the Boxer Tank issues we get called about, each with cause and fix.
First-shot temperature sag means the thermosiphon loop is scaling. We descale, flush the loop, and verify brew temperature at the group with a probe. Tank machines see harder duty here because their water quality changes site to site.
Most Boxer Tank builds run a vibration pump rather than a rotary, and vibe pumps announce wear by getting loud before they get weak. We inspect the mounting, measure output, and replace the pump once it falls below spec. On a mobile machine, treat the pump as a service item and budget for it the way you budget for tires.
Reservoir operation means whatever water gets poured in, and event sites rarely pour in soft water. We descale aggressively, log the mineral exposure so the next interval can be planned instead of guessed, and set the machine up with a tank-side filter cartridge that protects the boiler between services.
Water around the reservoir base is usually the tank gasket giving up. We replace the gasket and verify the seal with the tank brimmed, because a seal that holds half-full can still weep under a full load.
A tank-empty sensor that rarely triggers is a failed float switch, and it will let the pump run dry. We test the switch for continuity and replace it. Cheap part, expensive habit to ignore.
On units converted to direct plumb, a fill-logic fault can pull the tank dry mid-shot. We verify the solenoid wiring and the float-bypass jumper position against the configuration the machine is actually running. Conversions done without that jumper set correctly cause exactly this fault.
Weak steam on the single wand comes from scale in the steam path, a blocked tip, or valve wear. We descale the circuit, clear the tip, and rebuild the valve, then verify pressure with the boiler at temperature. On a one-wand machine there's no backup, so this gets treated with urgency.
Your coffee emergency ends here
Call or submit the form. We confirm your address, model, and the issue.
An experienced technician arrives, runs full diagnostics, and identifies the root cause.
You receive a flat, itemized quote. Nothing proceeds without your green light.
We complete the repair, run a test cycle, and walk you through what to watch for.
Parts on the truck
Receipts
Prompt, reliable, and professional. That's how I'd describe their servicing.
*Estimated based on the approximate distance from our nearest service centre, average commute time, and median service-call length for one machine. Prices in Canadian dollars (CAD $). Final quote provided on-site after diagnosis.
FAQ
21 answers covering service, repair, parts, installation, warranty, and edge cases.
Updated August 2026
Because the tank drinks whatever the venue offers, and event-site water is usually hard. We descale, log the exposure, and fit a tank-side filter cartridge so the boiler stops paying for every gig. Machines on filtered fills scale at a fraction of the rate.
Yes, more than it seems. A dead float switch means nothing stops the pump from running the tank dry, and dry running kills pumps and risks the element. It's a continuity test and a cheap part; fix it before it costs you real money.
Most tank builds run a vibration pump instead of the rotary pump found on plumbed machines. Vibe pumps get noisy as they wear, which is useful: the machine tells you before output actually drops. We measure output and replace once it falls below spec.
Usually the reservoir gasket, which hardens and gives up with age and vibration. We replace it and test with the tank completely full, because a seal that holds at half can still weep under full load. If it isn't the gasket, a dye-trace finds what it actually is.
Yes, we see converted units in the field. The conversion has to set the fill solenoid wiring and the float-bypass jumper correctly, because a wrong configuration causes the classic fault of the auto-fill pulling the tank dry mid-shot. If your converted machine does that, the jumper is the first thing we check.
Yes, we service these machines where they work: festival sites, markets, commissaries, parking pads. Tell us the location and the symptom when you book. Most Tank faults are small parts we can carry to the site.
It's rated for 50 to 120 cups, and the honest ceiling depends on milk drinks, refill discipline, and how hot the venue runs. A steady stream suits it better than slam-and-wait rushes. If your events keep crossing the top of that range, that's a conversation about a second machine, and we'll say so plainly.
Filtered, low-hardness water whenever you can get it; straight tap from an unknown venue is how these boilers scale out early. A tank-side filter cartridge is the practical answer when sources vary. The cost of the cartridge is rounding error next to a boiler descale.
Scale damage first, float switches and reservoir gaskets after that, then vibration pumps. It's a short list, and almost all of it is small-parts work when caught early. The machines that avoid the list are the ones running filtered water.
Flat rate for the visit, parts billed at their actual cost on top. You'll hear the rate when you book, and for bigger jobs we quote in writing on-site before any work starts. No estimate that balloons mid-job.
Same-day. Call in the morning and a technician is usually on-site before the day is out; calls placed later in the day book for the next morning. Urgent breakdowns get priority routing.
The GTA and most of the Golden Horseshoe: Toronto through Mississauga, Vaughan, and Markham, out to Oshawa, Hamilton, and Niagara. If you're not sure you're in range, call and we'll tell you straight.
No. We work call by call. Plenty of customers put us on a maintenance schedule eventually, but that's their choice after seeing the work, never a requirement.
Parts carry their manufacturer warranty, and we stand behind our labour: if the same fault recurs, call us and we'll review it. Specific terms are discussed upfront on each job, not promised in marketing copy.
On-site whenever possible, which is most of the time. If a job genuinely needs the bench, like a full boiler rebuild or major electronics work, we'll say so before anything leaves your building.
Call us or send the form on this page. We confirm the machine, the fault, and a time window the same day. If it's urgent, say so and we'll route the nearest technician.
Diagnosis first: we confirm the fault, tell you what caused it, and quote the fix before touching a wrench. Most repairs finish in that same visit because the common wear parts ride on the truck.
High-wear parts for the platforms we service constantly ride on the truck. Anything else we order, usually next-day where suppliers allow, and we tell you the lead time before committing you to anything.
Usually, yes. We service legacy machines for as long as parts can be sourced, and we're honest when a repair stops making financial sense against a replacement. You get the math, you make the call.
Often, but that's not the pitch. We quote against the actual work, not a factory pricing book, and we'll tell you when a manufacturer warranty claim is the better route. Transparency is the value; the price usually follows.
Yes, and we do it by default on the way out. Half of repeat faults trace back to skipped daily cleaning or wrong routine, so the technician walks your team through what actually matters before leaving.
One call, wherever the machine happens to be parked.
Call (289) 217-3796 now →