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| English | Russian |
| off-seating conditions | условия отрывающего давления (Off-seating head refers to the water pressure forcing the penstock out of the wall. Oddessita) |
| on-seating conditions | условия прижимающего давления (On-seating head refers to the water pressure forcing the penstock into the wall. Oddessita) |
| seating head | прижимающее давление (When the water pressure tends to press the door/shutter on to the gate frame then the type of water head is called seating /on-seating water head. Oddessita) |