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Building Design and Construction Handbook - Merritt - Ventech!

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TABLE 14.4 Fixture Units <strong>and</strong> Trap <strong>and</strong> Connection Sizes for Plumbing Fixtures<br />

14.22<br />

Fixture type<br />

Fixture-unit value<br />

as load factors<br />

Private Public<br />

Domestic water<br />

Min size of<br />

connections, in<br />

Cold<br />

water<br />

Hot<br />

water<br />

Fixture-unit value<br />

as load factors<br />

Drainage<br />

Min size of trap,<br />

in<br />

Bathtub† (with or without overhead shower 2 4 1<br />

⁄2<br />

1<br />

⁄2 2 1 1 ⁄2<br />

Bidet 2 4 1<br />

⁄2<br />

1<br />

⁄2 2 1 Nominal 1 ⁄2<br />

Combination sink <strong>and</strong> tray 3 1<br />

⁄2<br />

1<br />

⁄2 2 1 1 ⁄2<br />

Combination sink <strong>and</strong> tray with food-disposal unit 4 3 11 ⁄2<br />

Dental unit or cuspidor 1 3<br />

⁄8 1 1 1 ⁄4<br />

Dental lavatory 1 2 1<br />

⁄2<br />

1<br />

⁄2 2 1 1 ⁄4<br />

Dishwasher, domestic 2 2 11 ⁄2<br />

Drinking fountain 1 2 3<br />

⁄8 1 1 1 ⁄4<br />

Floor drains‡ 1 2 2<br />

Kitchen sink 2 4 1<br />

⁄2<br />

1<br />

⁄2 2or3 1 1⁄2 Kitchen sink, domestic, with food-waste grinder 3 2 11 ⁄2<br />

Lavatory� 1 3<br />

⁄8<br />

3<br />

⁄8 1 1 Small P.O. 1 ⁄4

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