The Mainsboost MB 300SV features a nominal vessel size of 300 litres and a pressurised water holding capacity of approximately 174 litres. Available in single, twin and triple vessel options, each unit is supplied with a comprehensive Upstream Line-In Kit (ULK) featuring 22 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. Stuart Turner Mainsboost MB 300SV-1-22