1,000 Litre Fluid CAT5 Type AB Air Gap Break Tank


1,000 Litre Fluid CAT5 Type AB Air Gap Break Tank

  • Fitted with screened overflow and weir
  • WRAS approved polymer
  • Available in black, boat blue or natural colour options only
  • Lid 455mm
  • Moulded in lifting handles to help installation of the tank
  • Supplied as standard with 1.5” outlet
  • Dimensions: (mm) 1350 L x 760 W x 1844 mm H
  • 100% rust proof – UK manufactured
  • Guaranteed for 10 years

Please note: Tank sizes quoted are subject to a +/- 3% variation



1,000 Litre Fluid CAT5 Type AB Air Gap Break Tank

Enduramaxx’s 171310CAT5 1,000 Litre Fluid CAT5 Type AB Air Gap Break Tank is 1650 L x 700 W x 1720mm H and constructed from the MDPE polyethene which is UV stabilised.  This tank is a one-piece, seamless, rotationally moulded tank which guarantees strength, impacts resistance, durability and many years of use.  This arrangement of fittings for compliance with the Water Supply (Water Fittings) Regulations 1999 in England and Wales and the technically identical Scottish Water Byelaws 2004.

Enduramaxx’s 1,000-litre Fluid Category 5 Break Tank is fitted with a Type AB-Air gap weir overflow for complying with the Water Supply (Water Fittings) Regulations 1999. The weir overflow (Fluid 5) which is non-mechanical backflow prevention for inlets up to 32mm. Many water authorities demand that water storage tanks connected to the mains water supply have suitable measures to protect the mains from contamination. The AB Airgap is designed to prevent the inlet to become submerged and stop the water within the tank contaminating the mains water supply should there be a backflow pressure drop in the mains.

These 1,000-litre break tank is fitted with a cowled screened overflow to prevent the ingress of light into the tank and a stainless steel mesh to prevent the debris getting into the tank.  Larger weirs can be specially made for larger inlets.  This break tank meets the requirements of WRAS Fluid Category 5 Break Tanks, also known as a Fluid Cat 5 break tank, Fluid Cat 5 tank and Fluid Cat 5 booster set tanks.

What Installations Need To Be Fluid Category 5?

Many installations potable drinking water tanks which are connected to the mains water supply will need to be fluid category 5 approved.  In some case, this tank will need to be insulated to prevent thermal gain and loss such as plant rooms and outside potable water storage.  More details for tank installations which come under this are available here

Equipment Mounting and Customisation

The 1,000 Litre CAT5 AB Air Gap Tank is available with tank modifications options to suit your installation.  Liquid level sensor assemblies, fill pipes, BSP threaded inlets, outlets, PN16 and ANSI flanges, welded sockets are available.

Delivery of Your 1,000 Litre Break Tank

Our 1,000 Litre Fluid CAT5 Type AB Air Gap Break Tank is manufactured by Enduramaxx at our factory in Lincolnshire.   Most of these water tanks are stocked for collection or quick delivery throughout the UK.  We are available to deliver to site for installers to save double handling of these tanks.  in some cases where clients can’t offload the tank, we can offer Hiab deliveries which are priced upon request.  Please view our installation guide here.

Capacity 1,000 Litres
Length 1350 mm
Width 760 mm
Height 1844 mm
Outlet 1.5″ plastic male outlet
Lid 455 mm dia lid


Additional information

Dimensions 135 × 76 × 180 cm

Black, Blue