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ATCM Technical / News Page
Technical papers, industry news & web site links providing guidance as to the design requirements of tanks & cisterns
Technical Papers to download 
Cistern and Tanks - as time goes by Reliable, effective water storage Cistern and Tank Base Support Requirements Screened Overflow & Warning Pipe Design Parameters Bellmouth Overflows & Raised Float Valve Housings Float Valves - Their characteristics & performance Tank & Cistern Breather Vent determination Corrosion - Fundamentals and practical guidance Vortex Inhibitors - What are they and who needs them Sparge Pipes - Their ins and outs Tank Level Switches and all that jazz Type AB Air Gaps - Practical Examples Air Gap Calculations - Multiple cistern inlets
ATCM Type AB Air Gap and Spill Slot
Calculator based on the updated European and British
Standard, BS EN 13077:2008. Enter Tank Inlet size, Weir
Slot width and % free area of its Screen (if fitted) and the position of the Critical Water Level within the
tank is advised and whether the Spill Slot design is Regulation compliant.
ATCM Cistern
/ Tank Capacity Calculator
based
on BS 6700:1997 recommendations. Dependant on the duty or
application selected the "Actual Useable Capacity"
is calculated guidance is advised as to the required
"Nominal Capacity" in order to determine the
physical dimensions of the cistern or tank. Also advised is
the Nominal Capacity of an associated Break or Booster tank
should this be a requirement.
Industry News
ATCM driving up standards
ATCM members are actively engaged with the Regulating Authorities to ensure the tank and cistern products brought to market are the most appropriate for their respective duties and are fully compliant with regulatory requirements.
ATCM / WRAS - Design guidance for Cisterns and Tanks
The ATCM and the Water Regulations Advisory Scheme (WRAS) have jointly produced a WRAS Information and Guidance Note (IGN) entitled
"Cold Water Storage Cisterns - Design Recommendations for Mains Supply Inlets".
WRAS
publication, IGN No. 9-04-04, is available to download
A practical guide to assist designers, installers and users of water supply systems to ensure appropriate backflow protection (Air Gap) is provided within a cistern having mains water supply inlet/s for Water Regulation Fluid Categories 1 to 5.
Useful Links
Water Regulations Advisory Scheme (WRAS)
Water Supply (Water Fittings) Regulations 1999
