Watts Vacuum Breaker Assembly
The Vacuum Breaker is used with solar pool heater collectors to break the vacuum, by letting air into the system, and allow the solar panels to drain when the pump is turned off.
Instructions:
Step 1. Seal all threads with Teflon tape (tape not included).
Step 2. Screw the vacuum breaker into the 90º threaded adapter.
Step 3. Screw the 90º threaded adapter into the 1-1/2" x 1/2" Adapter
Note: If using a 1-1/2" x 3/4 Adapter instead, you must first screw it into the 3/4" x 1/2" adapter before screwing into the 90º adapter.
Step 4. Insert the vacuum breaker assembly in place of the lower or upper end cap and tighten with hose clamp.
For proper drainage to occur, the feed line must run downhill to the 3-way valve. The 3-way valve must be open or “non-positive seal.” A positive seal may be converted by removing the seal from the diverter or drilling a 3/16” hole in the center of the diverter inside the 3-way valve. You may also leave the “positive seal” 3-way valve open slightly to achieve the same results.
A typical solar panel roof kit should look like the diagram below when finished. It may vary based on the actual layout.
1 - Watts Vacuum Breaker
2 - 90º Threaded Adapter
3 - 3/4 x 1/2" Adapter [Needed only if using the 1-1/2 x 3/4" Adapter]
4 - 1-1/2 x 1/2" or 1-1/2 x 3/4 Pipe to Vacuum Breaker Adapter
When needing to isolate the solar, and still run the pump, an isolation ball valve will need to be installed on the solar feed line to the solar to achieve total shutdown capabilities.
PRINT » Installation Instructions [PDF Format]
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