Recommendations for a plastic header tank

[Mike Adams]

My reconfigured engine/skin tank and calorifier needs a replacement pressurised header tank to keep everything nice and clear of air. I have calculated that the water expands by 1/3rd litre between cold and hot so I am looking at about 2 litre capacity. I would prefer one that is transpanent with a traditional pressure cap. Anyone recommend one or should I just use an automotive one although these seem to have bespoke caps. There are plenty of alloy ones around but I would prefer one I can just glance at to check the level. Thanks.

[Ian F B]

2 minutes ago, Mike Adams said:

My reconfigured engine/skin tank and calorifier needs a replacement pressurised header tank to keep everything nice and clear of air. I have calculated that the water expands by 1/3rd litre between cold and hot so I am looking at about 2 litre capacity. I would prefer one that is transpanent with a traditional pressure cap. Anyone recommend one or should I just use an automotive one although these seem to have bespoke caps. There are plenty of alloy ones around but I would prefer one I can just glance at to check the level. Thanks.

Sounds like something off a7.5 tonne will be needed,2 litres is a lot of water.??

[David Mack]

Plastic  vehicle tanks don't really look the part though. What about fitting a sight tube to an alloy tank?