Allows air to enter the solar pool heating system when the pool pump is turned off and facilitate water drainage from the panels. This is especially important when winterizing your panels to prevent freeze damage. 

Compatibility: SunLink Pro solar pool heater panels.

WHAT'S INCLUDED:

• (1) Vacuum Relief Valve (PN: 85539)
  

The sale of this product is subject to the terms and conditions of sale: https://www.solarpoolsupply.com/pages/terms-conditions.