How CANRO's licensed gas fitters diagnose, repair, or replace a inlet filter on residential gas boilers and water heaters in Port Moody.
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Quick answer
A failing inlet filter on a gas boiler or water heater usually shows itself through a specific pattern of symptoms rather than a sudden total failure, and the fix depends on whether the part is worn, seized, or has failed outright. The inlet filter, sometimes called a sediment or supply screen, sits on the cold-water inlet of a tankless water heater or boiler and catches grit, scale flakes, and debris before it can reach the narrow internal passages of the heat exchanger. In Port Moody, a licensed CANRO gas fitter inspects and tests the inlet filter before recommending a repair or replacement, since guessing at the wrong part wastes a service call.
Need a licensed gas fitter for your hot water / boiler? Call CANRO at (604) 359-1081 — residential natural-gas heating and hot water across Metro Vancouver since 1999.
The inlet filter, sometimes called a sediment or supply screen, sits on the cold-water inlet of a tankless water heater or boiler and catches grit, scale flakes, and debris before it can reach the narrow internal passages of the heat exchanger. It's a small, cheap part doing a job that protects a much more expensive one.
A technician shuts the isolation valves, pulls the inlet filter, and inspects what's caught in it -- fine sediment usually means routine buildup, while larger debris or metal shavings points at something upstream like recent plumbing work. The screen itself gets checked for tears or a mesh that's collapsed, since a damaged filter stops protecting the heat exchanger even if it's technically still in place.
| Symptom | Likely cause | Next step |
|---|---|---|
| Reduced flow, no other explanation | Clogged inlet filter | Isolate, pull filter, clean or replace |
| Fault code related to flow or scale | Debris restricting flow to the heat exchanger | Clean filter, check heat exchanger for scale too |
| Torn or collapsed filter mesh | Age or pressure surge damage | Replace the filter screen |
| Heavy sediment after nearby water main work | Debris pushed into the supply line | Clean filter, monitor for recurrence |
This is one of the least expensive, most maintenance-friendly parts on the whole appliance, and CANRO treats it that way -- clean it as routine service, replace the screen if it's torn or degraded, and there's rarely a case for anything more involved. The value is in catching it before restricted flow starts stressing the heat exchanger or triggering nuisance fault codes.
Because it's small and inexpensive, the inlet filter is the part homeowners are most likely to forget exists until flow problems show up. CANRO checks it as a matter of course during any tankless service call, since a five-minute cleaning here can prevent a callback for a 'no hot water' complaint that turns out to have nothing to do with the burner or the heat exchanger at all.
A good share of Port Moody's older housing near Moody Centre and the original townsite predates the current building code by decades, and mechanical systems in those homes have often been added to, moved, or patched rather than replaced as a unit. That history matters when a component fails, because the part sitting in front of a technician may not match what a newer install in Coquitlam or Burnaby would have.
Ballpark cost for inlet filter replacement depends on the part, access, and whether it's a standalone repair or bundled with a broader service visit -- CANRO quotes after a short in-person or photo-based assessment rather than over the phone. If the underlying appliance itself is old enough that a full boiler or water heater replacement makes more sense than another repair, a technician will say so plainly: boiler installs generally run $6,500-$14,000+, boiler replacements $7,500-$15,000+, and tankless installs $3,500-$7,500, all ballpark figures, not quotes.
Safety note
This work involves a gas-fired appliance, so any part of the job that touches the gas line, burner, venting, or a pressure-bearing component must be done by a Technical Safety BC licensed gas fitter. CANRO holds gas licence LGA0043870 and boiler licence LBP0046450. If you ever smell gas, leave the home first and call FortisBC at 1-800-663-9911.
The inlet filter, sometimes called a sediment or supply screen, sits on the cold-water inlet of a tankless water heater or boiler and catches grit, scale flakes, and debris before it can reach the narrow internal passages of the heat exchanger.
Watch for the warning signs above -- most failures give some notice before they cause a full breakdown, whether that's a sound, a smell, an intermittent fault, or a visible sign of wear. A CANRO technician can confirm with a proper inspection rather than a guess.
This is one of the least expensive, most maintenance-friendly parts on the whole appliance, and CANRO treats it that way -- clean it as routine service, replace the screen if it's torn or degraded, and there's rarely a case for anything more involved. A technician will always check whether a repair is realistic before recommending replacement.
Any work on or near a gas-fired boiler or water heater's controls, burner, or venting should be done by a Technical Safety BC licensed gas fitter, even when the specific part itself isn't gas-carrying. CANRO holds gas licence LGA0043870 and boiler licence LBP0046450.
Depending on the part, ignoring it can mean anything from reduced comfort and efficiency to a genuine safety issue, and a small failed component often puts extra strain on other parts of the system the longer it's left. It's almost always cheaper to address it early than after a full breakdown.
Yes -- CANRO is a licensed, family-run Metro Vancouver gas contractor and services natural gas boilers and water heaters throughout Port Moody and the surrounding area.
Family-run, TSBC-licensed (gas LGA0043870 · boiler LBP0046450), serving Metro Vancouver homes since 1999. Residential, natural gas only.
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