Listed in our glossary are many of the common words and phrases for swimming pool and spa equipment, chemicals, water testing and part replacement. How many times have you tried to explain a problem to your pool tech and just couldn't find the right words? Now with a little practice, you can be an expert! Or if he tells you "your impeller is stuck," you can see exactly what an impeller is and what it does! You can browse the terms alphabetically or search for a term using the form.