A combination for a fire protection system connected to a wet supply line, the combination comprising: a valve (120, 920, 1120) having a body (122, 922, 1122) with an inlet (125, 925), at least one outlet (127, 927a, 927b) and a fluid passageway between the inlet and each outlet, a seal member supportable across the passageway to close the passageway by a pivotally mounted lever, the seal member being supported across the passageway in a sealing position by a latch engaged with the lever, wherein the valve further comprises a subassembly including a hollow boss slidably receiving a shaft of the seal member and the lever includes an adjustment screw located to contact a distal end of the shaft and vary mechanical compression applied to the seal member by the lever in the closed position; an activation component (12, 60, 160, 960, 1160) including a base (62, 962, 1162), a movable member (64, 964) movable with respect to the base, a bias member located with respect to the base to bias the movable member from a preactivation position with respect to the base to an activated position with respect to the base, and a thermally responsive element (68, 1168) retaining the movable member in the preactivation position only until a predetermined thermodynamic condition is reached, the thermally responsive element being configured to lose structural integrity under the predetermined thermodynamic condition; and a flexible connector (14, 50, 150, 1050, 1150, 1250) including at least a flexible hollow outer cable housing (52,152, 1052, 1152, 1252) with a first end (52a, 152a, 1052a, 1152a, 1252a) configured to be stationarily connected with the body (122, 922, 1122) of the valve (120, 920, 1120) and a second end (52b, 152b, 1152b), configured to be stationarily connected with the base (62, 962, 1162) and a flexible cable (54, 154, 1054, 1154, 1254) slidably located inside the flexible hollow outer cable housing for only sliding movement within the outer cable housing and having a first end (54a, 154a, 1054a, 1154a, 1254a) mechanically connected with the latch for movement of the latch with respect to the lever by movement of the first end (52a, 152a, 1052a, 1152a, 1252a), and a second end (54b, 154b, 1154b) configured to be stationarily connected with the movable member so as to be moved with respect to the flexible hollow outer cable housing by movement of the movable member with loss of structural integrity by the thermally responsive element at the predetermined thermodynamic condition. a valve (120, 920, 1120) having a body (122, 922, 1122) with an inlet (125, 925), at least one outlet (127, 927a, 927b) and a fluid passageway between the inlet and each outlet, a seal member supportable across the passageway to close the passageway by a pivotally mounted lever, the seal member being supported across the passageway in a sealing position by a latch engaged with the lever, wherein the valve further comprises a subassembly including a hollow boss slidably receiving a shaft of the seal member and the lever includes an adjustment screw located to contact a distal end of the shaft and vary mechanical compression applied to the seal member by the lever in the closed position; an activation component (12, 60, 160, 960, 1160) including a base (62, 962, 1162), a movable member (64, 964) movable with respect to the base, a bias member located with respect to the base to bias the movable member from a preactivation position with respect to the base to an activated position with respect to the base, and a thermally responsive element (68, 1168) retaining the movable member in the preactivation position only until a predetermined thermodynamic condition is reached, the thermally responsive element being configured to lose structural integrity under the predetermined thermodynamic condition; and a flexible connector (14, 50, 150, 1050, 1150, 1250) including at least a flexible hollow outer cable housing (52,152, 1052, 1152, 1252) with a first end (52a, 152a, 1052a, 1152a, 1252a) configured to be stationarily connected with the body (122, 922, 1122) of the valve (120, 920, 1120) and a second end (52b, 152b, 1152b), configured to be stationarily connected with the base (62, 962, 1162) and a flexible cable (54, 154, 1054, 1154, 1254) slidably located inside the flexible hollow outer cable housing for only sliding movement within the outer cable housing and having a first end (54a, 154a, 1054a, 1154a, 1254a) mechanically connected with the latch for movement of the latch with respect to the lever by movement of the first end (52a, 152a, 1052a, 1152a, 1252a), and a second end (54b, 154b, 1154b) configured to be stationarily connected with the movable member so as to be moved with respect to the flexible hollow outer cable housing by movement of the movable member with loss of structural integrity by the thermally responsive element at the predetermined thermodynamic condition.