Fourth quarter 2019 sales for the segment of $523.1 million were essentially flat with the fourth quarter of 2018. Incremental sales of approximately $14 million from the Water-Right acquisition and growth in water treatment sales were offset by lower boiler volumes and lower contractual formula pricing associated with a portion of water heater sales based on lower steel costs.
Fourth quarter 2019 segment earnings of $128.4 million were essentially flat with segment earnings in the same quarter in 2018. The net favorable impact to profits from lower steel costs was offset by the unfavorable impact from the lower boiler volumes. As a result, fourth quarter 2019 segment margin of 24.5 percent was essentially the same as fourth quarter 2018.
Rest of World segment
Sales of this segment of $935.8 million in 2019 declined 20 percent compared with segment sales of $1.2 billion in 2018. China sales declined 19 percent in local currency, primarily related to weakerend-market demand, elevated channel inventory levels, as well as a higher mix ofmid-price products. The weaker Chinese currency unfavorably impacted translated sales by approximately $39 million. India sales grew approximately 13 percent in constant currency compared with 2018.
Rest of World earnings of $40.2 million in 2019 declined from $149.3 million in 2018. The impact to profits from lower China sales and a higher mix ofmid-price products, which have lower margins, more than offset the benefits to profits from lower SG&A expenses and material costs in that region. Weaker China currency translation negatively impacted earnings by approximately $3 million. As a result of these factors, segment margin of 4.3 percent declined significantly from segment margin of 12.7 percent in 2018.
Fourth quarter 2019 Rest of World segment sales of $234.3 million declined 21 percent compared with the same quarter in 2018. China sales declined 23 percent in local currency, primarily related to weak consumer demand, elevated channel inventory levels, as well as a higher mix ofmid-price products. The weaker Chinese currency unfavorably impacted translated sales by approximately $4 million.
Fourth quarter 2019 Rest of World earnings of $1.5 million declined from $39.5 million in the fourth quarter of 2018. Earnings were lower primarily due to the unfavorable impact to profits from lower China sales, a higher mix of lower margin products, and charges in China associated with customer programs to reduce channel inventory levels and head count reduction.