Break Tank & Pump MIDI AB 230 V

From £1,760.00 £2,112.00 inc. vat


Wall mounted break tank and pump assembly with Fluid Category 5 protection by virtue of the integral Type AB air gap complying with BS EN13077: 2003. The set is intended for light industrial use and is housed in a stainless steel cabinet ready for wall mounting in a frost free environment. The primary purpose is to provide backflow protection in accordance with the new Water Regulations. The Midi-Break® also provides cold water at a known outlet pressure. The unit is quiet since the pump is mounted on anti-vibration mounts with flexible stainless braided internal hoses. Automatic pump control is by means of a pressure vessel, industrial pressure switch and a flow sensor. This system provides reliable pump operation with the minimal amount of starts. The pump has a soft start feature, which avoids water and electrical surges. The pump is protected via low level float switch in the cistern.


Waste bin washing – use Midi-3A single tap only; Hose union tap – non-domestic – use Midi-3A single tap; Wash-down – animals or any FC 5 – see モBoost-A-Breakヤ; Sinks with hoses; Bidets – ascending spray – see Ablution Plant – BTHW; Vegetable washing; Butchery & meat equipment / Slaughterhouse; Laboratories; Clothes & Dish washing machines – healthcare premises; Instantaneous showers and heaters – care premises; Applications deemed to be Category 5 by water company

Product Specification
  • Backflow Prevention Yes
  • Cistern Size 3.5 Litres
  • Inlet Size 15 mm
  • Outlet Size 15 mm
  • Powered Yes
Specification Clause

Where indicated on the drawing a Break Tank & Booster Set – model BTMIDI-2A shall be installed – as manufactured and distributed by Arrow Valves Ltd – Tel 01442 823123 The output pressure shall be 0.17 lt/s @ 2 bar and a closed valve head of 3.1 bar. The unit shall be housed in a stainless steel cabinet which shall be mounted on a wall at a serviceable height. The internal cistern shall provide a type AB air gap. The cistern level shall be controlled automatically by a servo solenoid valve operated via stainless steel conductive electrodes and controller. A volt free BMS fault relay shall be provided – model BTBMS3. A low-level pump cut-out shall automatically reset once the cistern is sufficiently full. The pump shall be continuously rated, feature brass wetted parts and be acoustically attenuated with anti-vibration mounts. The 22 mm overflow shall discharge in a safe and conspicuous manner. A 15 mm supply is required, which must maintain a dynamic pressure of 1.0 bar. The manufacturer’s flexible hose with servicing valve and strainer (supplied) shall be installed.

Data Sheets


btmididatasheet-4.pdf (1.31 MB)


Installation Guide

btmidibreakommanual-1.pdf (878.31 KB)


Additional Information



Approval Certificate

BTMIDI-2205759.pdf (160.42 KB)


Fault Finding Chart (MIDI-1)



Fault Finding Chart (MIDI-2a)



Fault Finding Chart (MIDI-3a)