First and foremost they need a full heavy-duty machine specification with high performance to do their job quickly and efficiently and a way of discharging large volumes of liquid as quickly as possible. The 1800AP incorporates a full Structofoam two-motored Twinflo power head, float valve and trash basket inlet filter system and, in addition, our fully automatic submersible pump unit with its own Hi/Lo level float control allows continuous suction and discharge operation. Accessories are full 38mm (11/2) standard with the addition of a full 10m (33) discharge hose to assist with the water disposal.