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nahtorreyous t1_iurov44 wrote

Can I guess, for steam?

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[deleted] t1_iurpyn2 wrote

[deleted]

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nahtorreyous t1_iurzjjd wrote

If it's steam, it's not open all the time. You bleed the lines once in a while, like the old radiators in the house.

This is a complete guess though

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