Calcolatore Unità di Carico Idraulico Gratuito
Conta le unità di carico idraulico per il dimensionamento dei tubi dell'impianto.
Total Fixture Units
15.5 WSFU
Total Fixture Units vs Toilets (Flush Valve)
Formula
## Fixture Unit Method Each plumbing fixture is assigned a unit value based on its flow demand. The total WSFU determines minimum pipe size per code tables. A quick estimate for peak demand in GPM uses the Hunter curve approximation: **GPM = 5 x sqrt(WSFU)**.
Esempio Risolto
2 toilets, 3 sinks, 2 showers, 1 dishwasher, 1 washer.
- 01Toilets: 2 x 2.5 = 5
- 02Sinks: 3 x 1 = 3
- 03Showers: 2 x 2 = 4
- 04Dishwasher: 1 x 1.5 = 1.5
- 05Washer: 1 x 2 = 2
- 06Total = 15.5 WSFU
- 07Peak GPM = 5 x sqrt(15.5) = 19.7 GPM
Domande Frequenti
What is a fixture unit?
A fixture unit (FU) is a relative measure of the probable hydraulic demand of a plumbing fixture. One fixture unit originally equaled about 7.5 GPM, but modern codes use tables rather than a direct conversion.
Are these values code-compliant?
This calculator uses typical residential WSFU values. Always verify against your local plumbing code (IPC, UPC, or local amendments) for the final design.
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