Revision 4 reflects the following changes:
Reformatted to InDesign from Quark. Additional Metric and Celsius data added as needed to text, figures, and tables. Text clarity
improved throughout using improved word choice to avoid ambiguity or incompleteness. Introduction revised on page 5. Figures 5
revised on page 13. Figure 6 revised on page 14. Figure 7 revised on page 15. Figure 8 revised on page 16. Illustrated Parts List
added starting on page 21. Table B: Removed flow rates of 70-80 GPM.
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