Pool plumbing can be confusing. Solar pool heating valves can add to that confusion. If you want to learn how to turn off and isolate your solar pool heating system with manual valves, you’ve come to the right place. The images and videos below show you how to turn the valves correctly to change the flow of water in your system.

To prevent pump damage, you must bypass the solar loop before isolating the system for service or repair. This article focuses on high-quality two-way and three-way valves installed by Fafco Solar. It applies to valves made by Pentair, Praher, Jandy, and Hayward – all work basically the same way. Note that this does not apply to basic red, gray, or blue handled ball valves, which are far inferior to the valves shown. Ball valves have different handle orientations, so this article should not be followed for those systems.

For more information on how these valves work, here is another video.

Note that the OFF tab on the valve handle always points to the pipe that is blocked. Your system may or may not have labels, but the important thing to remember is that the OFF tab is where the gate that stops water flow is located. 


Your valve configuration may be different, on the ground rather than the wall, or may not contain all of the pictured valves. If you have any questions about how to turn off and isolate your solar pool heating system, call Fafco Solar at (239) 574-1500.