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BS 6700 Peak Water Demand Calculator | Engineering & Plumbing Design Tool

water demand calculation bs 6700 calculator plumbing engineering tools hydraulic design peak flow rate calculator fixture unit method water supply design mep engineering calculator

About This Tool

Peak Water Demand Calculation per BS 6700 Standards

This professional-grade calculator determines peak water demand flows (L/s and m³/hr) for plumbing systems using BS 6700 methodologies. Essential for:

  • Accurate sizing of water supply pipes and pumps
  • Compliance with British Standard water supply regulations
  • Preventing system undersizing/oversizing in commercial and residential buildings

Key Applications

Plumbing System Design

Calculate fixture unit loads for entire buildings with BS 6700 compliant results.

Hydraulic Calculations

Determine peak flow rates for pump selection and pipe network design.

This tool incorporates all standard BS 6700 fixture data including:

WC cisterns (0.15 L/s) Shower heads (0.2 L/s) Commercial sinks (0.3 L/s) Flush valves (1.2 L/s)

Engineers and plumbing designers use this calculator to ensure compliance with UK building regulations Part G and international water supply standards.

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BS 6700 Peak Water Demand Calculator | Engineering & Plumbing Design Tool

Appliance Flow (L/s) Quantity
Wash basin, 15-mm Sep. Taps 0.15
Wash Basin with Mixer Tap - 15 mm 0.2
Bidet 0.2
WC Cistern 0.15
Domestic Kitchen Sink - 15 mm 0.2
Washing Machine - 15 mm 0.2
Dish Washing Machine - 15 mm 0.15
Shower Head 0.2
Urinal Flush Valve 0.3
Bath Tub (Domestic) 0.3
Garden / Garage Bib Tap 0.5
Non-Domestic Kitchen Sink - 20 mm 0.3
Non-Domestic Bath Tub 0.6
WC Flush Valve 1.2

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