The Mainsboost MB 100 SV features a nominal vessel size of 100 litres and a pressurised water holding capacity of approximately 55 litres. The unit is supplied with a comprehensive Upstream Line-In Kit (ULK) featuring 22 mm or 28 mm pipe diameter fittings. Constructed from an epoxy coated steel body and a highly durable virgin butyl diaphragm, all Mainsboost vessels are WRAS Approved and come with a 5 year guarantee.