Boiler System Power Flushing — Complete Procedure Guide
Published: July 21, 2026 — CANRO Heating & Cooling — Greater Vancouver, BC
What Power Flushing Does
Power flushing uses a high-flow pump to circulate cleaning chemicals and water through the entire heating system at high velocity. This dislodges and flushes out sludge, rust particles, and debris that have accumulated in radiators and pipework over years of operation.
When Power Flushing Is Needed
Signs your system needs flushing: radiators have cold spots at the bottom (sludge settles there), some radiators do not heat up despite proper bleeding, the boiler takes longer to heat the home, or after installing a new boiler on old pipework (always recommended).
Cost and Process
Power flushing costs $400-800 for a typical Vancouver home with 8-12 radiators. The process takes 4-8 hours. A magnetic filter is recommended after flushing to capture future debris. Most boilers benefit from flushing every 5-8 years.