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System Volume & Water Content
Estimate total hydronic system water content from pipe runs, emitters and plant, with a corrosion-inhibitor dose.
The Ensign ToolboxSystem Volume & Water ContentEstimate total hydronic system water content from pipe runs, emitters and plant, with a corrosion-inhibitor dose.
Pipe material
Steel bores follow BS EN 10255 Medium (not legacy BS 1387). Each length tier below maps to this material's internal bore.
Pipe runs (by size)
m
Internal bore 13.6 mm
m
Internal bore 20.2 mm
m
Internal bore 26.2 mm
m
Internal bore 32.6 mm
m
Internal bore 39.6 mm
m
Internal bore 51.6 mm
Emitters
no.
L
Radiators ≈ 2–12 L; override from manufacturer data
Plant components (heating side)
L
L
Heating-side coil or thermal store content
L
Low-loss headers, manifolds, plate HX, AAVs…
Inhibitor dosing
L
Litres treated per 1 L inhibitor (Sentinel X100 = 100)
Check input values (lengths/contents ≥ 0, whole emitter count, dose > 0)