Some solar cylinders fail due to corrosion. The solar probe pockets are particularly susceptible to this problem. However, these can often be sealed off.

Alternatives to cylinder replacements

If the main solar coil has perforated, it is often possible to fit a separate heat exchanger.

Solasyphon vessl
Willis solasyphon external heat exchanger


Solar cylinder replacement

If the actual cylinder needs to be replaced, we will often recommend to increase the size to avoid future overheating.

Buffer Vessel with insulation
Newark copper cylinders twin coil solar cylinder with 50-75mm thermal insulation

The new solar cylinder is likely to be better insulated and have a more efficient solar coil than the old one.