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Plumbing
Plumbing calculators for pipe sizing, water heater sizing, gas lines, drainage, and water flow calculations
Instant Answers
Pre-calculated results for common scenarios
water heater sizing
Gas Water Heater for Single PersonElectric Water Heater for Single PersonGas Water Heater for 2 PeopleElectric Water Heater for 2 PeopleTankless Water Heater for 2 PeopleGas Water Heater for Family of 4Electric Water Heater for Family of 4Heat Pump Water Heater for Family of 4Tankless Water Heater for Family of 4Gas Water Heater for Large Family (6 People)Tankless Water Heater for Large Family (6 People)Heat Pump Water Heater for 2 PeopleGas Water Heater for Heavy Usage FamilyTankless Water Heater for Heavy Usage FamilyEco-Friendly Heat Pump Water Heater for Family of 4
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Fixture Unit Pipe Sizing
Calculate required pipe sizes based on fixture unit loads per International Plumbing Code
IPC 2021 Table 709.1IPC 2021 Table 710.1(2)
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Water Heater Sizing Calculator
Determine appropriate water heater capacity based on occupancy and usage patterns
ASHRAE Service Water HeatingIPC 2021 Chapter 5
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Gas Pipe Sizing Calculator
Calculate natural gas and LP gas pipe sizing based on BTU load and pipe length
IFGC 2021 Table 402.4(2)NFPA 54 National Fuel Gas Code
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Drainage Slope Calculator
Calculate proper slope for drainage pipes to ensure adequate flow per plumbing codes
IPC 2021 Table 704.1UPC Uniform Plumbing Code
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Water Pressure and Flow Calculator
Calculate water pressure loss and flow rates in piping systems using Hazen-Williams equation
Hazen-Williams EquationIPC 2021 Chapter 6