Match the insulation bore to the pipe's measured outside diameter. Also check the required wall thickness and the space available around fittings and supports.
Thermal Insulation for Hot and Cold Plumbing Runs
Pipe lagging places an insulating layer around plumbing runs to reduce heat loss from hot pipes, limit condensation on cold services and lower frost risk in vulnerable spaces. MacBlair stocks insulation products within its plumbing equipment selection.
Match the internal bore of the insulation to the outside diameter of the pipe. Common domestic copper sizes include 15mm, 22mm and 28mm, but measure before ordering. The insulation wall thickness also matters: restricted voids may need a different specification from lofts, garages or plant rooms.
Fit sleeves closely along straight runs and close every longitudinal seam. Mitre or form joints neatly at bends and tees, and seal gaps around valves, clips and penetrations without preventing access to controls. Plan supports through the pipe covers and clips range.
Insulation reduces freezing risk but cannot guarantee protection during prolonged cold or where water is stationary. Outdoor products may need weather and UV protection specified by the manufacturer. Browse copper pipe and plastic pipe systems for the adjoining installation.
Pipe Lagging FAQ's
Greater thickness can reduce heat transfer further, but the specification depends on pipe size, location and clearance. Follow project or building requirements where they apply.
Butt adjoining lengths closely and seal seams and joints with the system recommended by the insulation manufacturer. Uncovered gaps reduce overall performance.
Only if the manufacturer approves it for outdoor exposure. Many materials need a weatherproof, UV-resistant covering when fitted externally.
It slows heat loss and reduces risk, but cannot guarantee a pipe will not freeze. Protect exposed routes, deal with draughts and follow cold-weather guidance.