Rainwater Header Break Tank - Break Tank with AB Air Gap
Part Number: AB18
Product Overview
Cistern with Type AB air gap providing Fluid Category 5 protection. Supplied as a complete package, including stainless steel wall bracket - incorporating a drip tray.
The primary purpose is to provide backflow protection in accordance with the Water Regulations. The cistern features a stainless steel screened weir slot complying with BS EN13077: 2003.
The AB18 supplies water by gravity and is intended for applications where it is possible to mount the assembly sufficiently higher than the application – e.g. 5 m = 0.5 bar.
Where there is insufficient head refer to “Boost-A-Break” - model BTAB or “Midi-Break” - model BTMIDI
The unit is relatively small and quick to install. Filling is via a 15 mm “Torbeck” compact float operated valve. A servicing valve is supplied.
NEW! - Rainwater Header Break Tank (model AB18T) - Similar to AB18 but with 2nd float valve for mains water top-up ensuring continuation of water supply during electrical power failures.
Specification Clause
AB18 – Break Tank with AB Air Gap
Where indicated on the drawing a Break Tank with Fluid Category 5 type AB air gap complying with EN13077: 2003 shall be installed – model AB18 - as manufactured by Arrow Valves Ltd – Tel 01442 823123 www.arrowvalves.co.uk. The assembly shall have an 18 litre nominal capacity cistern with a stainless steel mesh screened weir slot. The cistern shall be located in a stainless steel drip tray with integral bracket for wall mounting. The inlet shall have a 15 mm “Torbeck” compact float operated valve. The cistern shall be suitably elevated to provide adequate static pressure. The cistern outlet shall be 22 mm push-fit and 22 mm overflow should be connected to the drip tray.
AB18T – Rainwater Header Break Tank
Where indicated on the drawing a Rainwater Header Break Tank with automatic mains water backup and Fluid Category 5 type AB air gap complying with EN13077: 2003 shall be installed – model AB18T - as manufactured by Arrow Valves Ltd – Tel 01442 823123 www.arrowvalves.co.uk. The assembly shall have an 18 litre nominal capacity cistern with a stainless steel mesh screened weir slot. The cistern shall be located in a stainless steel drip tray with integral bracket for wall mounting. The rainwater inlet shall have a 15 mm “Torbeck” compact float operated valve. The mains water inlet shall have a second “Torbeck” float valve operated at a lower level by a linear linkage assembly. The cistern shall be suitably elevated to provide adequate static pressure. The cistern outlet shall be 22 mm push-fit and 22 mm overflow should be connected to the drip tray.
Application
Areas where cistern can be elevated.