Question

the lowest quality shower stall base on this list is
one - piece fiberglass
three - piece fiberglass
china
mortar bed ceramic
metal
question 13
overflows should not be found on
bathtubs
basins
kitchen sinks
whirlpool baths
lavatories

Explanation:

1. For the first question, three - piece fiberglass is often considered lower quality compared to other materials for shower stall bases as it may have more seams which can lead to leaks and durability issues. One - piece fiberglass is more seamless, and materials like china, mortar bed ceramic, and metal are generally more durable and of higher quality.
2. For the second question, overflows are typically found in bathtubs, basins, lavatories, and whirlpool baths to prevent water from overflowing the fixture. Kitchen sinks usually do not have overflows as they are designed for different usage and are less likely to be left unattended with running water to the point of overflowing.

Answer:

1. three - piece fiberglass
2. kitchen sinks