Automatic pressure relief valve releases pressure at 45 psi or can be manually operated to release pressure. Heavy-duty HDPE tank is extremely durable yet lightweight, with easily visible fill level markings, are resistant against UV ray impact and are corrosion-resistant and transparent. Ergonomically-shaped commercial shut-off valve with lock-on/lock-off feature and strong nylon-reinforced high-pressure hose. High-quality seals fitted to all parts that come in contact with chemical. Equipped with chemical-resistant EPDM seals for use with alkaline and disinfecting solutions. Ergonomically-shaped operating components. Heavy-duty pumps for quick and effortless pressurization.