Pressurisation Units
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BOSS™ Direct G4 Pressurisation Unit
March 2023 - Water Authority Approval Status
The BOSS™ Direct G4 Pumpless pressurisation unit is fully authorised for use in the following Water Authority areas for sealed heating and cooling systems;
● Jersey Water
● Severn Trent Water
For all other Water Authority areas you will need to seek local Water Authority approval to install the unit, UNLESS it is being installed downstream of a CAT5 Air gap (e.g. a booster set) when the only authority to install required is the system owner.