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I live in a new house and it is plumbed entirely in HEP2O plastic plumbing. Plastic plumbing is reliable and easier to fit than compression joints. HEP2O works at 6 Bar , 95 Degrees C. Higher pressures at lower temperatures. Other systems probably have similar performance. Push fit plastic plumbing is guaranteeed for 25 years or more.
Most push fit systems will join your existing copper pipes, but none will provide earth continuity. That means a lot of earth straps. What a pain.
You can either:
Leave the joints and hope they do not leak.
Replace the compression joints with solder fittings and use an Antex Pipemaster. Flame free, but not cheap.
Use push fit joints and earth straps.
Replace the whole lot with plastic.
Most push fit systems will join your existing copper pipes, but none will provide earth continuity. That means a lot of earth straps. What a pain.
You can either:
Leave the joints and hope they do not leak.
Replace the compression joints with solder fittings and use an Antex Pipemaster. Flame free, but not cheap.
Use push fit joints and earth straps.
Replace the whole lot with plastic.