Harlequin Tanks is a renowned brand in the field of liquid storage & sewage treatment solutions, particularly known for its high-quality tanks designed for various industries and applications. The Harlequin range covers oil, diesel, AdBlue, water, hot water, and effluent. For our customers peace of mind, the tanks are manufactured with high-quality medium density polyethylene (MDPE) / Glass Reinforced Plastic (GRP) material, and our pumps, parts and fittings are sourced from world leading brands. All our products are manufactured only from premium grade, virgin materials. Harlequin believes that the materials which it uses to manufacture its tanks, as well as the structural design, make them the first choice for homeowners across the UK and Ireland. The tanks and systems are manufactured to ISO 9001, IS0 14001 and ISO 45001 standards.