PPR, PEX and Copper Pipe Compared
PPR is welded, common in newer Dubai buildings, and fails at a badly welded socket. PEX is flexible with fewer joints and fails at fittings. Copper lasts decades and pinholes where water stagnates. Galvanised steel scales shut from the inside and is the reason old villas lose pressure.
PPR and PEX, the modern choices
PPR joints are heat welded, so a correct joint is effectively one continuous piece of pipe. The weakness is the process, not the material. A socket welded a few seconds short holds pressure at handover and lets go three years later. PEX runs in long flexible lengths with far fewer joints, which removes most of the failure points, and puts the remaining risk squarely on the crimped or pressed fittings at each end.
Copper and galvanised steel, the older ones
Copper is durable and tolerant of heat, and its characteristic failure is a pinhole where water sits still for long periods, often on a dead leg left behind by a bathroom refurbishment. Galvanised steel is the one that ages badly. Scale grows inward year on year until the bore carries a fraction of what it once did, which is why an old Jumeirah villa loses pressure that no pump can restore.
What this means for a repair
The material decides the remedy. A PPR failure is cut out and rewelded. A copper pinhole is a section replacement, and finding one usually means others are coming. A galvanised run at the end of its life should be replaced rather than patched, because every joint you disturb on scaled steel tends to become the next leak.
Common Questions
How do I know what pipe I have?
Look under a sink or in the ceiling hatch. Green or grey plastic with welded sockets is PPR. Cross linked plastic in long coils with metal fittings is PEX. Reddish metal is copper. Dull grey metal with threaded joints is galvanised steel.
Is plastic pipe worse than copper?
No. Correctly installed PPR and PEX have long service lives and cost less to work with. Most plastic pipe failures are workmanship failures, not material failures, which is a different problem with a different fix.
Can different pipe materials be joined together?
Yes, with the right transition fitting. The danger is joining dissimilar metals directly, copper to galvanised steel for example, which corrodes at the contact. That is a common sight in buildings repaired piecemeal over decades.
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