Plumbing & Sanitary Design Calculator

Professional design tools for plumbing engineers — pipe sizing, pump selection, and system design

Note: These are enhanced engineering tools for professional preliminary design and analysis. For construction/permit use, validate with local codes and a licensed engineer.

Project Info

Water System Design

Drainage & Sanitary

Pump Systems

Special Systems & Reference

Project Information

Project Name:

Client Name:

Location:

Prepared By:

Plumbing Code Standard:

Measurement Units:

Active Design Standard: RNPCP 2021 (Philippines)

Water System Design Tools

Designing per: RNPCP 2021 (Philippines) - Water Supply Systems

Water Supply & Pipe Sizing

Reference: RNPCP 2021 Section 611 | Velocity: 1.5-2.5 m/s

Total Fixture Units:

Peak Factor:

(0.5-1.0)

Supply Pressure:

Min Fixture Pressure:

Water Tank & Reservoir Sizing

Reference: RNPCP 2021 Section 603

Population Served:

people

Daily Demand:

L/day

Emergency Days:

days

Fire Reserve:

Domestic Water Booster Pump

Reference: RNPCP 2021 Section 612 | Basic sizing for domestic water systems

Required Flow:

L/s

Elevation Difference:

Friction Loss:

Safety Margin:

Hot Water System Demand

Reference: RNPCP 2021 Section 607

Number of Bathrooms:

Simultaneous Use:

Hot Fraction:

Drainage & Sanitary System Design

Designing per: RNPCP 2021 (Philippines) - Drainage Systems

Sanitary Sewer Load Calculation

Reference: RNPCP 2021 Section 701

Total DFU:

Pipe Slope:

Fixture Type:

Storm Drainage — Rational Method

Reference: RNPCP 2021 Section 1102

Roof Area:

m²

Rain Intensity:

mm/hr

Runoff Coefficient:

Septic Tank Sizing

Reference: RNPCP 2021 & DOH Standards

Number of Persons:

people

Daily Flow per Person:

L/day

Retention Time:

hours

Compartments:

Grease Trap Sizing

Reference: RNPCP 2021 Section 1011

Fixture Type:

Flow Rate:

L/s

Retention Time:

minutes

Pump System Design

Designing per: RNPCP 2021 (Philippines) - Pump Systems

Booster Pump Power Calculation

Reference: RNPCP 2021 Section 612 | Detailed power analysis for pump specification

Required Flow:

L/s

Static Lift:

Friction Loss:

Efficiency:

Sump Pump & Lift Station

Reference: RNPCP 2021 Section 1201

Sump Volume:

Emptying Time:

minutes

Static Head:

Application:

Fire Protection Pump Sizing

Reference: NFPA 14 (2023) & BFP Standards

Required Flow:

L/s

Total Dynamic Head:

Pump Efficiency:

Building Type:

Rainwater Pump Sizing

Reference: PGBC 2015 Requirements

Required Flow:

L/s

Total Dynamic Head:

Pump Efficiency:

Usage Type:

Special Systems & Code References

Designing per: RNPCP 2021 (Philippines) - Special Systems

Fire Protection — Standpipe

Reference: NFPA 14 (2023) & BFP Standards

Number of Standpipes:

Flow per Standpipe:

L/s

Duration:

minutes

Building Height:

Rainwater Tank Sizing

Reference: PGBC 2015 Requirements

Roof Area:

m²

Annual Rainfall:

mm/yr

Collection Efficiency:

Daily Water Demand:

L/day

Sewage Treatment Plant (STP) Design

Reference: DENR DAO 2016-08

Daily Wastewater Flow:

m³/day

BOD5 Influent:

mg/L

Treatment Type:

Effluent Quality:

Drainage Fixture Unit (DFU) Tables

Reference: RNPCP 2021 Table 7-3

Select Code Standard: