Tools & Calculators Directory
Code-compliant hydraulic calculators, pipe capacity engines, and interactive CAD diagram makers. Free, open, and instant.
Pipe Volume & Fluid Capacity
10 ToolsCalculate internal liquid volume, linear holding capacity (gal/ft & L/m), and filled water weight across standard piping materials.
Pipe Volume Calculator
Universal cylinder volume, multi-unit liquid holding capacity, and total filled fluid weight.
PVC Pipe Volume Calculator
Schedule 40 and Schedule 80 PVC inside diameters and linear holding capacities.
Copper Pipe Volume Calculator
Type K, Type L, and Type M copper tubing volume and fluid weight.
Cast Iron Soil Pipe Volume
Hubless cast iron sanitary drain and building sewer holding capacities.
Schedule 40 Steel Pipe Volume
Carbon steel and galvanized hydronic heating line fluid weight.
PEX Tubing Volume Calculator
PEX-A and PEX-B potable water lines and radiant floor heating loops.
Gas Pipe Volume Calculator
Internal cubic feet and gallonage capacity for natural gas and propane piping.
Pipe Volume Gallons Calculator
Dedicated US liquid gallons output with gal/ft linear holding schedules.
Pipe Volume Litres Calculator
Metric capacity calculator with liters per meter and kg fluid mass.
Water Pipe Volume Calculator
Total fluid volume and water weight for domestic plumbing supply lines.
Sanitary Drainage, Slope & Velocity
8 ToolsCalculate building sewer fall per foot, pitch percentage, drainage fixture unit (DFU) stack sizing, and fluid velocities per IPC and UPC codes.
Drain Pipe Slope Calculator
Calculate sewer fall per foot, pitch percentage (1/4" & 1/8"), and true pipe cut length.
Drainage Fixture Unit (DFU) Calculator
Size horizontal branches, building drains, and vertical soil stacks by fixture count.
Pipe Flow Rate Calculator
Calculate volumetric flow in GPM and fluid velocity in ft/s across standard pipe sizes.
Copper Pipe Flow Rate Calculator
Flow rate and velocity limits (5–8 ft/s) for ASTM B88 Type K, L, and M tubing.
3" Drain Pipe Slope Calculator
Calibrated minimum pitch and fall schedules for 3" main bathroom drains.
4" Sewer Pipe Slope Calculator
Standard building sewer pitch and fall schedules for 4" municipal lines.
1" Pipe Flow Rate Calculator
Capacity, velocity lookup tables, and friction guides for 1" service mains.
2" Pipe Flow Rate Calculator
Flow matrix and peak velocities for 2" commercial building service lines.
Water Heater Sizing & Thermal
8 ToolsSize tankless on-demand units, conventional storage tanks, electric kW power, and gas BTU firing rates for residential and commercial loads.
Water Heater Sizing Calculator
Size tankless units by peak GPM and storage heaters by First Hour Rating (FHR).
Tankless Water Heater Sizing Calculator
Compute simultaneous fixture flow demand and temperature rise (ΔT) in GPM.
Electric Tankless Sizing Calculator
Calculate required electric kilowatt power and breaker amperage for tankless units.
Gas Tankless Sizing Calculator
Determine natural gas and propane BTU/hr input firing rates.
Tankless Sizing Flow Chart
Instant lookup table matching climate zones and simultaneous shower counts.
Complete Water Heater Size Guide
Comprehensive engineering breakdown of tank vs tankless sizing rules.
2-Bathroom Tankless Sizer
Calibrated peak demand and temperature rise for 2-bath residences.
3-Bathroom Tankless Sizer
Sizing recommendations for 3-bathroom high-demand households.
CAD Drafting & Symbol Libraries
7 ToolsDraft 2D floor plans, 30-degree isometric DWV riser schematics, and reference ASME/ANSI plumbing engineering symbols.
Online Plumbing Drawing Software
Browser-based 2D floor plan and 3D isometric riser drafting tool with PDF export.
Bathroom Isometric DWV Riser Tool
Preconfigured 3D riser diagram maker for residential bathroom groups.
Isometric Plumbing Drawing Tool
Draft whole-house isometric drainage and water supply diagrams.
2D Plumbing Layout Editor
Top-down floor plan layout editor for water supply and DWV routing.
Searchable Plumbing Symbols Library
Searchable vector symbols database for valves, fixtures, and fittings.
Plumbing Drawing Symbols Guide
Visual guide to standard valve symbols, pipe line styles, and notations.
Plumbing Blueprint Symbols Legend
Standard blueprint abbreviations (CW, HW, VTR, CO, DFU) and architectural symbols.