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Possible to modify steam radiator valve to add riser vent?
Is it possible to modify a one pipe steam radiator shut off valve to add a riser vent at the top of the valve? I'd rather not deal with the hassle and risk of drilling into the riser pipe to add a riser vent. I'm picturing some method of removing the valve stem mechanism and adding a riser vent at the top of the valve body. Possible? I've never disassembled a radiator valve so I'm not familiar with the internals.