What is the calculated load on a DWV-system piping for two bath groups, a kitchen group, a laundry group, and a floor drain?

What is the calculated load on a DWV-system piping for two bath groups, a kitchen group, a laundry group, and a floor drain?

• A. 11 d.f.u.
• B. 13 d.f.u.
• C. 15 d.f.u.
• D. 17 d.f.u.

Answer: (B)

The calculated load on a drainage, waste, and vent (DWV) system is determined by assessing the number of fixtures and their corresponding drain fixture units (d.f.u.). Each plumbing fixture contributes a specific number of d.f.u. based on its type and usage frequency. In this case, two bath groups (which typically include a tub and lavatory) would contribute a combined load of about 6 d.f.u. A kitchen group (including a sink) generally adds around 2 d.f.u. The laundry group (which often consists of a washing machine) contributes about 2 d.f.u. Finally, a floor drain adds approximately 2 d.f.u. Calculating the total gives us: - Two bath groups: 6 d.f.u. - One kitchen group: 2 d.f.u. - One laundry group: 2 d.f.u. - One floor drain: 2 d.f.u. Adding these together results in a total load of 12 d.f.u. However, it's important to apply any adjustments or derating factors based on the total number of fixtures or the type of installation. In this case, regulations often apply a correction factor, which fine-tunes the load calculation. After considering possible adjustment

The calculated load on a drainage, waste, and vent (DWV) system is determined by assessing the number of fixtures and their corresponding drain fixture units (d.f.u.). Each plumbing fixture contributes a specific number of d.f.u. based on its type and usage frequency.

In this case, two bath groups (which typically include a tub and lavatory) would contribute a combined load of about 6 d.f.u. A kitchen group (including a sink) generally adds around 2 d.f.u. The laundry group (which often consists of a washing machine) contributes about 2 d.f.u. Finally, a floor drain adds approximately 2 d.f.u.

Calculating the total gives us:

• Two bath groups: 6 d.f.u.

• One kitchen group: 2 d.f.u.

• One laundry group: 2 d.f.u.

• One floor drain: 2 d.f.u.

Adding these together results in a total load of 12 d.f.u. However, it's important to apply any adjustments or derating factors based on the total number of fixtures or the type of installation. In this case, regulations often apply a correction factor, which fine-tunes the load calculation. After considering possible adjustment