Spa Jets

[TooleCW]

In the process of building our pool/spa. Thoughts on standard 1.5” wall fitting & 1.5” spa jet w/ blower vs. the larger 2” & 2.5” Venturi systems?

 

[mas985]

Welcome to the forum. In general, larger pipe is always better but there are other factors that may have a much larger impact on jet performance.

Please describe the entire design:

• Distance from pump to spa
• Pipe size used for suction and return lines back to pump
• Number of spa jets
• Spa jet nozzle orifice diameter
• Elevation difference between spa water level and the pump
• Pump make/model used for the jets

Also, there are a couple of ways to plumb a spa/jet system.

Higher performance configuration:


Lower performance configuration:



Also, a blower is not always necessary if the spa is designed properly. Unless the spa plumbing runs uphill to the pump, a Hartford loop is usually necessary near the spa to make sure the air pipe does not fill with water. Otherwise a blower is required to clear the air line when the jets are started.