2. Clean out the keyholes (using a Proteus keyhole gouger).
3. Assembly time is only about 20 seconds.
4. Attach the keys, and pump the handle.
5. Tow the cover clear of the manhole.
6. Some special covers require special keys
7. When positioned back in place, open the valve to re-seat the cover.
Powerful Develops 1.5 tons of breakout force Fast Only 20 secs from 0 to 310mm Simple Requires neither skill nor strength Light Heaviest part weighs only 13kg